Journal articles: 'Lira software'

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А. Sokolova. "STEEL STORAGE TANK SIMULATING USING BUNDLED SOFTWARE LIRA." Bridges and tunnels: Theory, Research, Practice, no. 7 (April 16, 2016): 43–47. http://dx.doi.org/10.15802/bttrp2015/66711.

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Purpose. In this article application for analysis of steel storage tank loaded with hydrostatic presser and with unilateral bottom-base constraint is observed. Linear work of construction material was considered in order to verify offered finite-element model. Methodology. Geometrical model of steel tank with a capacity of 100 000 m3 was built in compliance with standardized tank dimensions. Cylindrical shell was modeled with uniform mesh layout. Winkler’s foundation model with one coefficient of soil reaction ( kN/sm3) was used. Two conditions:accuracy of calculation, which requires a big amount of nodes; applied analysis, which limit node quantity - were taken into account while shell model discretization. Findings. Comparison of principal deflected mode components, defined by numerical computing and the known analytical method was carried out. It was found that bending moment and displacement distribution character in cylindrical shell, defined by numerical computing and by the known analytical method are qualitatively similar. Undetected bottom uplift was revealed. Originality. Assumptions, which are used in analytical methods, such as: half-infinite beam bottom modeling and bidirectional bottom-base connection - were eliminated in this tank model. Practical value. A numerical tank model applicable for deflected mode analysis of plate-sell junction in nonlinear formulation was suggested.

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DUBINCHYK, O. I., and L. O. NEDUZHA. "JUSTIFICATION OF THE STRESS-STRAIN STATE OF THE PILE FOUNDATION USING SOFTWARE COMPLEXES." Bridges and tunnels: Theory, Research, Practice, no. 20 (December 1, 2021): 13–18. http://dx.doi.org/10.15802/bttrp2021/245247.

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Purpose. Bridge supports with a high pile caps require more attention when calculating their strength due to the difficult operating conditions of the piles. The purpose of the scientific article is to substantiate the stress-strain state of the pile foundation of the bridge structure using software computing systems SCAD and LIRA-CAD. Methodology. An analysis of software used to automate the design of foundations was conducted. The main parameters of SCAD and LIRA-CAD software packages are yielded. With their help, finite-element models of the pile foundation of the bridge support with a high pile cap were built. The developed models maximally reflect the properties of the soil base and foundation, its pile cap and piles, geometric characteristics and the influence of the finite elements meshing is considered. Calculations were performed in SCAD and LIRA-CAD software packages with monitoring of the calculation process. Findings. During the numerical analysis of the pile foundation of the bridge structure with a high pile cap, vertical displacements, force factors (normal forces and bending moments) in the piles and stresses in the body of the support and piles were determined. Based on these results, an analysis was performed, which is combined with a comparison of the obtained results. Implementation of SCAD and LIRA-CAD software allows to significantly reduce design time, to reduce project costs, to improve the quality and efficiency of investments. Originality. A comparison of the stress-strain state obtained during the numerical analysis of SCAD and LIRA-CAD software, which proved the difference in the approach to modeling in these complexes, was conducted. Practical value. The results of substantiation of the stress-strain state of the pile foundation with the use of software complexes made it possible to verify the design solution of all elements of the foundation of the bridge structure with a high pile cap.

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Makeev, S. A., N. G. Silina, A. A. Komlev, and M. A. Stupin. "Verification of lira-sapr calculation of i-beams with two symmetry axes for general stability in transverse bending in the plane with maximum stiffness." E3S Web of Conferences 413 (2023): 05005. http://dx.doi.org/10.1051/e3sconf/202341305005.

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The paper considers verification of calculation of split I-beams with two symmetry axes on the general Eulerian stability at transverse bending in the plane of maximum stiffness in the software package (PC) LIRA-SAD. Calculations for various loads are given. Numerical calculation results in PC LIRA-SAP are compared with calculation by analytical formulas of S.P. Timoshenko and V.Z. Vlasov. Conclusions about calculation accuracy in PC LIRA-SAD in comparison with analytical formulas analysis are made.

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Pidlutskyi, Vasyl, Oleksandr Piatkov, and Vasyl Behan. "Investigation of the stress-strain state of foundation structures in determining the vertical stiffness of piles using different software systems." Bases and Foundations, no. 47 (December 22, 2023): 15–28. http://dx.doi.org/10.32347/0475-1132.47.2023.15-28.

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The results of numerical modeling of the interaction between a multi-storey building on a pile foundation and the soil base in the "Lira-SAPR" software are presented. A comparison of the stress-strain state of foundation structures was performed using different methods for determining vertical stiffness (Rz) in single-node FE 57 (this element is designed to model the behavior of a pile together with the surrounding soil, similar to FE 56, and can implement the interaction with the "SOIL" system). Piles were modeled by a chain of single-node FE 57 connected by vertical bars. In the first variant, the calculation of the building was performed in the "Lira-SAPR" software. To determine the vertical stiffness in FE 57, a soil model with physical-mechanical characteristics was created, and layering was defined according to the engineering-geological cross-section in the "SOIL" system. The calculation of vertical stiffness took into account mutual influence and the model of the conditional foundation. In the second variant, the determination of vertical stiffness (Rz) in FE 57 was carried out using the "Plaxis 3D" software. The overall model of above-ground structures, foundations, and all necessary loads were created in the "Lira-SAPR" software. Subsequently, an export to "Plaxis 3D" was performed, where the soil was previously modeled as a three-dimensional soil mass (with characteristics and strengths of layers similar to those created in the "SOIL" system) using the "Hardening soil" behavior model. After the import into "Plaxis 3D," the analysis of the "Soil-Foundation-Structure" system was conducted, and the obtained values of vertical stiffness (Rz) in FE 57 were exported back to "Lira-SAPR". After the export of "refined" values of vertical stiffness to "Lira-SAPR", a general static analysis and comparison of the stress-strain state of foundation structures with the first calculation variant was performed. It was established that the vertical stiffness in FE 57 in the first variant is higher than in the second, accordingly, the total displacements for the first variant are smaller. The importance of using the connection between "Lira-SAPR" and "Plaxis 3D" or other specialized geotechnical software complexes was demonstrated to obtain more accurate results of the interaction of the "Soil-Foundation-Structure" system due to the possibility of using nonlinear soil models to better describe the behavior of the foundation.

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Ksenofontova, Tatyana. "The role of digital technologies in the formation of specialists training in construction." SHS Web of Conferences 98 (2021): 05035. http://dx.doi.org/10.1051/shsconf/20219805035.

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Media space and digital technologies occupy ever increasing area in everyday life, including design and construction of engineering structures of various purposes. Training of future specialists specializing in construction is not an exclusion. Nowadays education involves elements of real design and construction activity, such as using modern software complexes in education, which allow to study future specialty at early stage. Thus, it is possible to form required competences of future specialists for their further activity. This article analyzes experience of teaching digital technologies exemplified by the use of modern software complex: LIRA-SAPR (OOO LIRA-SAPR, Kiev).

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Рощина, Светлана, Svyetlana Roina, Михаил Лукин, Mikhail Lukin, Алексей Грибанов, and Aleksey Gribanov. "Calculation deformability of composite beams based on numerical studies in the software package Lira 9.2." Construction and Architecture 2, no. 1 (2014): 64–67. http://dx.doi.org/10.12737/3392.

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The problems of calculating deformability composite beams in the software package Lira 9.2 based on real wood work under load are considered. The calculation in the nonlinear formulation using the well-known Belyankin - Prager chart is performed.

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Geraymovich, Yuriy, Isaak Yevzerov, and Dmitriy Marchenko. "THE NEW PHYSICALLY NONLINEAR FINITE ELEMENTS IN SOFTWARE PACKAGE LIRA 10.8." International Journal for Computational Civil and Structural Engineering 15, no. 1 (2019): 61–66. http://dx.doi.org/10.22337/2587-9618-2019-15-1-61-66.

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The new physically nonlinear finite elements, based on the theory of elastic plasticity, are proposed for bending rods and plates. These new elements can be used for static and dynamic problems, including seismic. The iterative method is used for static problems, the finite differences method - for dynamic.

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Shkryl, Oleksii, Yurii Maksymiuk, Volodymyr Dolgoshey, and Vladyslav Buchko. "Determination of stress intensity coefficients using PC LIRA CAD." Strength of Materials and Theory of Structures, no. 112 (April 17, 2024): 132–38. http://dx.doi.org/10.32347/2410-2547.2024.112.132-138.

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Today, the issue of involving fracture mechanics approaches to the calculation of structures with cracks is becoming more and more relevant. For the most part, the implementation of such approaches is carried out using software complexes in which the finite element method is implemented. Among them, such software complexes as Abaqus, Ansys, Nastran stand out, where the implementation of fracture mechanics approaches is constantly being improved. However, the cost of licenses for the use of such complexes, especially in the conditions of Ukraine, does not allow most researchers to fully use such programs. Therefore, it is relevant to study the possibility of applying fracture mechanics approaches in software complexes, the use of which is free. In construction, a significant number of structures are isotropic bodies. Operation of most of them is accompanied by elastic deformations. If there are cracks in them, the load-bearing capacity is assessed using stress intensity factors (SIF). This article examines the possibility of determining the TIN based on the results of the specified stress-strain state obtained with the help of the free software package "PC LIRA-SAPR 2016 R5 (non-commercial)". The calculation of SIF is performed by a direct method based on the determined distribution of displacements and stresses around the crack tip. The crack is modeled by setting appropriate boundary conditions. Implementation of the direct method is performed in 2 ways. According to the 1st method, the SIF calculation is performed in the apical area according to the values of stresses and displacements. According to the 2nd method, the SIF is calculated by moving the node closest to the top of the crack. Approbation of the approaches was carried out on the test problem of tension of a plate with a central crack. A study of the influence of the dimensionality of the discrete model and the types of finite elements both outside the apex region and in the apex region itself was conducted. The obtained results showed the possibility of obtaining reliable SIF values in this software complex in two ways, subject to compliance with certain rules for building a discrete model.

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Melnyk, Ihor, Taras Prystavskyi, Volodymyr Partuta, and Danylo Yakymiv. "FEATURES OF THE CONSTRUCTION AND STRESS-STRAIN STATE OF CROSS REINFORCED CONCRETE BEAMS." Spatial development, no. 8 (June 28, 2024): 315–27. http://dx.doi.org/10.32347/2786-7269.2024.8.315-327.

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The article substantiates the relevance and necessity of experimental and theoretical studies of reinforced concrete structures under biaxial compression.To address this task, three main types of test specimens with intersecting beam arrangements were designed, manufactured, and studied. Additionally, four types of regular beams, which make up the intersecting beams, as well as cubes and prisms for determining the actual deformation and strength characteristics of concrete, were produced.In the central part of the beams in the pure bending zone, only the lower working reinforcement was provided, which was determined based on verification calculations to ensure failure occurs in the compressed concrete. Outside the pure bending zone, upper and transverse reinforcement was provided to prevent failure in inclined sections.The geometric dimensions of the test specimens were determined considering the design of the existing power stand and the technical characteristics of the testing equipment.The behavior of the test specimens was also modeled using the "LIRA" software suite. The experimental deflection values were compared with the deflections in the percentage load range obtained in the "LIRA" software suite. The comparison shows satisfactory convergence between the experimental deflection values and those obtained in the "LIRA" software suite.The main results of the research are as follows:For the first time, experimental studies of intersecting reinforced concrete beams were conducted. Experimental deflection values (as an integral measure of deformations) of linear and intersecting beams were obtained. The stress-strain state of the test specimens was modeled using volumetric elements and the actual mechanical characteristics of concrete and reinforcement. The "LIRA" software suite provides satisfactory convergence with the experimental deflection values, which is an important integral measure of the overall deformations of bent reinforced concrete specimens. Biaxial compression affects the deformation characteristics of concrete.

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Yevhenii, Klymenko, Kos Zeljko, Grynyova Iryna, and Polianskyi Kostiantyn. "Investigation of Residual Bearing Capacity of Inclined Sections of Damaged Reinforced Concrete Beams." Croatian Regional Development Journal 1, no. 1 (2020): 14–26. http://dx.doi.org/10.2478/crdj-2021-0002.

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Abstract The article reports on the results of the numerical and the laboratory tests to determine the effect of concrete damages near support areas in compressed zone of the reinforced concrete beams on their residual bearing capacity of inclined sections. According to the experimental plan, 15 single-span freely supported experimental samples with dimensions of 100×200×1200 mm made with different artificial damages within the shear span aν (1d, 2d, and 3d) were tested. The numerical test of prototypes was performed in software complex LIRA-SAPR 2017. The results of laboratory and numerical experiments showed good convergence regarding the bearing capacity, however, the nature of the fracture in samples B11-B14 did not match. Empirical - conducting laboratory experiments on samples using modern methods of measurement; numerical modelling – using software complex LIRA-SAPR 2017; analysis and statistical processing of the obtained research results; comparison of the obtained results; abstraction; generalization; deduction; formulation of the main conclusions and recommendations. The analysis found that the bearing capacity decreases with increased area of damage and shear span. Conducting the calculations in software complex LIRA-SAPR allows to predict the work elements and determine the bearing capacity with good accuracy, but in comparison with the real data there still are some differences in the character of destruction.

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Deineka, Vitalii, Pavlo Vegera, and Zinovii Blikharskyi. "SIMULATION INFLUENCE OF UNEVEN DAMAGE OF REINFORCED CONCRETE BEAM IN LIRA-FEM." Theory and Building Practice 2024, no. 1 (2024): 130–40. http://dx.doi.org/10.23939/jtbp2024.01.130.

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This article divulges the outcomes of theoretical investigations into non-uniformly damaged reinforced concrete beams, employing the LIRA-FEM software suite. The manifestation of defects and damages poses operational risks for buildings and structures. The objective of this study is to scrutinize the consequences of irregular damage occurrence in reinforced concrete beams, holding significant practical relevance for the determination of the stress-strain condition in reinforced concrete elements. To facilitate these theoretical inquiries, finite element modeling within the LIRA-FEM software suite is employed. Through the modeling results, stress levels were juxtaposed against ultimate stress thresholds, elucidating the deformability of unevenly damaged reinforced concrete beams. The study's significance lies in its potential to enhance the safety of building structures, mitigating risks during operational phases.

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Zeki Akarsu, Mahmut. "The Impact of the Turkish Presidential System on the Turkish Lira." Journal of Banking and Financial Economics 1/2021, no. 15 (2021): 14–24. http://dx.doi.org/10.7172/2353-6845.jbfe.2021.1.2.

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The political system always has a significant impact on economic indicators. Currency exchange is one of the indicators, which is influenced directly or indirectly by political developments. Investors and economic agents make investment decisions by not only economic outcomes but also political developments. Turkey is one of the countries, which can be an example of a domestic currency losing value significantly due to undemocratic political actions since the 2017 referendum. Therefore, in this study, the impact of the new presidential system on the Turkish Lira is investigated using the Bayesian structural time-series model in R software. According to the literature search, this study is the first article that analyzes how much the Turkish Lira decoupled negatively from peers and how badly the Turkish presidential system harms the Turkish Lira. According to the result, the undemocratic and unorthodox economic and political implementations cause the Turkish Lira to have dropped sharply and have decoupled negatively from other currencies significantly.

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Makeev, S. A., N. G. Silina, A. A. Komlev, and M. A. Stupin. "Engineering methodology for calculation of corrugated beams for bending and torsion. Flat bend form stability." E3S Web of Conferences 413 (2023): 05007. http://dx.doi.org/10.1051/e3sconf/202341305007.

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An engineering design procedure for calculating bending with torsion in corrugated beams, including finding the critical load of general stability, implemented in the commonly used MS Excel spreadsheet and verified in the LIRA-SAPR software package, has been proposed. The method makes it possible to take into account the beams section variability and corrugation parameters, to estimate the loading eccentricity effect, availability of supporting ribs and reinforcements of the compressed chord from the bending plane. Calculation results of particular design solutions for corrugated beams with definition of critical loads at transverse bending are given. Results of test calculation of a bent channel beam with calculation of stress-strain state parameters and its verification with the LIRA-SAP software package are given.

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Panchenko, S. P., A. A. Chaban, S. N. Krasnoperov, and M. L. Golovakha. "Application of «lira» software complex for research of anterior cruciate ligament stress." Bulletin of Prydniprovs’ka State Academy of Civil Engineering and Architecture, no. 2 (October 24, 2018): 46–53. http://dx.doi.org/10.30838/j.bpsacea.2312.290818.46.91.

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Huslysta, H. Ye, and D. O. Bannikov. "The significant valuation including non-lineal aspects in the “Building –Soiled array” system with its strain-stress state definition." Science and Transport Progress, no. 37 (June 25, 2011): 155–60. http://dx.doi.org/10.15802/stp2011/9463.

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The article is devoted to consideration of soil and reinforced concrete physical nonlinearity, structural nonlinearity and genetic nonlinearity at numerical simulation of system «structure–soil massif» by using the structural engineering analysis software LIRA.

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V. P. KUPRIY, O. L. TIUTKIN, and P. YE. ZAKHARCHENKO. "ANALYSIS OF FEATURES OF APPLIED SOFTWARE “LIRA” IN CALCULATIONS OF NON-CIRCULAR TUNNEL LININGS." Bridges and tunnels: Theory, Research, Practice, no. 12 (May 21, 2019): 41–50. http://dx.doi.org/10.15802/bttrp2017/167404.

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Purpose. The article examines the effect on the stress-strain state of the parameters of the finite-element model created in the “Lira” software package in a numerical analysis of non-circular outlined tunnels. Methodology To achieve this goal, the authors developed finite element models of the calotte part of the mine during the construction of a double track railway tunnel using “Lira” software. In each of the models in the “Lira” software package, the interaction zone with temporary fastening was sampled in a specific way. After creation of models, their numerical analysis with the detailed research of his results was conducted. Findings. In the finite element models, the values of deformations and stresses in the horizontal and vertical axes, as well as the maximum values of the moments and longitudinal forces in the temporary fastening were obtained. A comparative analysis of the obtained values of the components of the stress-strain state with a change in the parameters of the finite element model was carried out. The graphs of the laws of these results from the discretization features of the two models were plotted. The third finite element model with a radial meshing in the zone of interaction of temporary support with the surrounding soil massif was investigated. Originality It has been established that in the numerical analysis of the SSS of a tunnel lining of a non-circular outline, its results substantially depend on the shape, size and configuration of the applied finite elements, on the size of the computational area of the soil massif, and also on the conditions for taking into account the actual (elastic or plastic) behavior of the soil massif. Practical value. The features of discretization and the required dimensions of the computational area of the soil massif were determined when modeling the “lining – soil massif” system, which provide sufficient accuracy for calculating the parameters of the stress-strain state of the lining.

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Et al., Alimov Xikmat Tairovich. "Calculation Of A Multi-Storey Building Unfinished Construction Established In A Seismic Area 8 Points." Psychology and Education Journal 58, no. 1 (2021): 779–88. http://dx.doi.org/10.17762/pae.v58i1.829.

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The work contains the results of a survey of a multi-storey administrative building of unfinished construction with subsequent reconstruction. The data obtained in the calculation of the building using the LIRA 9.6 software package have been verified.

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Koval, P. M., A. E. Fal, and A. P. Verovka. "IMPACT OF THE TEMPERATURE-UNSPLIT SPANS ON STIFF CHARACTERISTICS OF FRAMEWORKS." Science and Transport Progress, no. 33 (August 25, 2010): 122–26. http://dx.doi.org/10.15802/stp2010/13186.

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Natural tests of existing temperature-unsplit spans are described. The data obtained during test and theoretical computations are analyzed; the constructive factor is determined. The comparison of theoretical computations of spatial models in the LIRA SOFTWARE is carried out.

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Kovalov, Andrii, Roman Purdenko, Yurii Otrosh, Vitalii Tomenko, Evhen Kachkar, and Roman Maiboroda. "ASSESSMENT OF FIRE RESISTANCE OF FIREPROOF STEEL BEAMS." Journal of Donetsk Mining Institute 51, no. 2 (2022): 43–53. http://dx.doi.org/10.31474/1999-981x-2022-2-43-53.

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Purpose. Development of a computer model for the study of fire resistance of steel structures protected by fire-resistant coatings, using the example of a fire-resistant steel beam created in the LIRA-SAPR software complex (Ukraine). Methods. Finite element method, application of computational methods of numerical modelling of the LIRA-SAPR software complex, mathematical modelling of thermal processes of non-stationary thermal conductivity. Results. A computer model was developed in the LIRA- SAPR software complex, with the help of which thermal engineering calculation of the beam was carried out. The model makes it possible to evaluate the fire resistance of both unprotected and fire-protected steel beams, to take into account the properties of the beam material and the material of the fire-resistant coating. The peculiarity of modelling the non-stationary heating of a fire-resistant steel beam is to specify the thermophysical characteristics of the fire-resistant coating when solving the problem of non-stationary thermal conductivity. The results of the calculated determination of the fire resistance of the fire-resistant steel beam were compared with experimental data. As a result, a satisfactory convergence of the results of the calculation and experimental study of fire resistance was established (the error is no more than 12%). The results of the experimental determination of the fire resistance of unloaded beams under fire conditions of the standard fire temperature regime were analysed. The accuracy of the developed computer model was evaluated with the results of the experiment. Scientific novelty. A finite-element model of a fire-resistant steel beam has been developed in the LIRA- SAPR software complex, which allows calculating the fire resistance limits of beams protected by fire-resistant coatings with scientifically justified parameters with sufficient accuracy for engineering calculations. Practical significance. It consists in creating the basis for the calculated assessment of fire resistance of building structures protected by fire-resistant coatings by creating computer models capable of performing fire resistance calculations. Due to this, there should be a significant reduction in the cost of work on fire resistance assessment and, as a result, an increase in the effectiveness of measures to increase the fire resistance of building structures.

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Bilyk, Serhii, Olha Bashynska, and Oleksii Bashynskyi. "Determination of changes inthermal stress state of steel beams in LIRA-SAPR software." Strength of Materials and Theory of Structures, no. 108 (May 30, 2022): 189–202. http://dx.doi.org/10.32347/2410-2547.2022.108.189-202.

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Abstract. In this article, the authors conducted a study of the stress-strain and temperature state of the steel frame of the building.Verification analysis of steel section for fire resistance in the homeland software package is carried out.The obtained results were compared with the results of a similar analysis in a foreign software package.The analysis of the dynamic problem of thermal conductivity of the cross section of the beam is carried out.The basic equations for solving the boundary problem of nonstationary thermal conductivity are given.Also, the algorithm of realization of analysis of temperature deformations on section of a steel beam by finite element method is given.The process of designing analytical model of structural elements and analysis of the stress-strain state when operating temperature is changed is considered.The analysis of kinematic and static characteristics of the calculated model under study is carried out.Based on the obtained analysis results, the temperature fields of the beam at certain time intervals are determined.Due to the uneven distribution of temperature in the cross section of the element, temperature deformations are occured.Also, due to the limitation of deformations by external connections, their appearance is accompanied by the development of temperature stresses.Therefore, the study of the peculiarities of thermal deformations in steel structures has considerable practical importance.Due to the urgency of the problem of determining thermal stresses and strains in structures, it is necessary to clarify and improve existing calculation methods, which can not sufficiently take into account changes in time of physical and mechanical characteristics of steel.Therefore, the authors of the article calculated the coefficients of reduction of the physical properties of the section and performed a static analysis of the structure. The change of the stress-strain state of the floor elements under the influence of fire is shown.The results of the analysis showed the importance of taking into account the influence of temperature on the strength and deformation characteristics in the calculation of structures.The authors of the article developed and presented an algorithm for analysing the strength of steel structures for flexibility, taking into account the thermal conduction analysis and the fire resistance analysis.

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Daniel, Olila. "Factors Influencing Utilisation of Immunisation Services among Children Under Five Years in Lira Municipality Lira District Northern Uganda." IDOSR JOURNAL OF EXPERIMENTAL SCIENCES 10, no. 3 (2024): 18–38. http://dx.doi.org/10.59298/idosr/jes/103.18.38.

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This study investigated the factors influencing the utilization of immunization services among children under 5 years in Lira Municipality, Lira district, Northern Uganda. Utilizing a community-based cross-sectional design with quantitative data collection methods, 380 mother-infant pairs were randomly selected from residents of Lira Municipality. Univariate, bivariate, and multivariate logistic regression analyses were conducted using STATA software version 14.0 to identify significant factors affecting immunization service utilization. The study found that 77.63% (295/380) of children under 5 years utilized immunization services, with the highest utilization observed among male children (82.71%). Factors significantly influencing utilization included mothers' education level (aOR 7.46, 95%CI 2.17 – 25.65, P=0.001), religion (Muslims vs. Christians: aOR 0.15, 95%CI 0.07 – 0.32, P<0.001), rudeness of health workers (aOR 3.50, 95%CI 1.73 – 7.06, P<0.001), awareness of subsequent immunization schedules (aOR 0.38, 95%CI 0.20 – 0.70, P=0.002), possession of a child immunization card (aOR 0.34, 95%CI 0.19 – 0.63, P=0.001), and understaffing at health facilities (aOR 2.87, 95%CI 1.43 – 5.78, P=0.003). The study highlights the importance of addressing these factors to improve immunization coverage, which currently falls below the global target recommended by WHO and UNICEF. Keywords: Immunization services, Children, Under-Vaccinated, Unvaccinated, Mothers, No versus Yes.

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Okello Simon Peter, Irene Ayugi ,. Micheal Manyange, Nyambane David. "Taxpayers’ Awareness and Tax Compliance in Local Governments, A Case of Lira District." IDOSR JOURNAL OF HUMANITIES AND SOCIAL SCIENCES 8, no. 2 (2023): 28–36. http://dx.doi.org/10.59298/idosrjhss/2023/12.1.5200.

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The study aimed to investigate the relationship between taxpayers' awareness and tax compliance in local government, specifically in Lira district. The research objectives included establishing the relationship between understanding tax laws, knowledge of tax regulations, and knowledge of tax obligations. The study used a correlational research design, using questionnaires and interviews for data collection. The sample size was determined using purposive and simple random sampling techniques. The data was analyzed using SPSS software, and 172 respondents participated. The findings showed a positive correlation between understanding tax laws and tax compliance. In other wards, understanding tax laws contributes to tax compliance. Knowledge of tax regulations and policies also positively correlates with tax compliance. Finally, knowing tax rights and obligations positively correlates with tax compliance. The study recommends that the compliance of taxpayers in Lira district be improved through tax training, seminars, and workshops aimed at enhancing tax laws, regulations, and obligations. This would help maximize tax payers' compliance. Keywords: Taxpayers ‘Awareness, Tax compliance, Lira district.

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Biloshytska, Nataliia, Mykola Biloshytskyi, Zakhar Tatarchenko, and Bohdan Diachuk. "MATHEMATICAL MODELING OF CONSTRUCTION WORK CONSTRUCTIONS IN COMPLEX CONDITIONS OF CHEMICAL PRODUCTION." Urban development and spatial planning, no. 81 (August 31, 2022): 59–69. http://dx.doi.org/10.32347/2076-815x.2022.81.59-69.

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The article deals with the conduct of a numerical experiment on study of the stress-strain state of building structures according to using developed mathematical models. Research methodology consists in the use of one of the most advanced BIM technologies in the world, namely of the LIRA 10.10 software complex © 2013-2021 LIRA Soft, for creating adequate mathematical models of an industrial building taking into account the most likely difficult operating conditions: loads, seismic and operational impacts, progressive collapse. Calculations have been made progressive collapse, where the initial calculation scheme is taken as the main scheme of the shelf. To determine the most dangerous part of the building in in the event of an emergency situation, a set of calculations was carried out with the sequential removal of each support column. From the analysis of calculations, calculation schemes were determined, in which the greatest forces arise from a special combination of loads. Later, these schemes were adopted basic for emergency calculations. Conducted mathematical modeling the work of building structures in difficult chemical conditions production using modern BIM technology, such as PC LIRA 10.10, allows you to get the necessary reliable data on the operation of real buildings thanks to the use of world experience in design, construction and operation of construction structures, buildings and structures during creation software product.

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Glushkova, Olga. "MODELING OF CONSTRUCTION SITES AND PROGRAM CALCULATION OF PROGRESSIVE DESTRUCTION." Interexpo GEO-Siberia 7 (2019): 49–55. http://dx.doi.org/10.33764/2618-981x-2019-7-49-55.

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The importance of the use of three-dimensional modeling for solving applied problems in construction is presented, the necessity of taking into account the progressive destruction in the calculations of building structures is substantiated. An overview of the existing methods of modeling and calculating the progressive destruction of building structures on the example of software systems SCAD Office and LIRA-CAD and comparison of the results. Special features of each software package.

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Koval, P. M., A. E. Fal, and S. M. Marchuk. "FEATURES OF DESIGNING PRECAST-MONOLITHIC BRIDGE SPANS." Science and Transport Progress, no. 33 (August 25, 2010): 127–30. http://dx.doi.org/10.15802/stp2010/13187.

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The calculation results for assembling monolithic spans are described. The data obtained during calculations are analyzed; the necessity of calculation of spans of this type at a few stages of including separate elements into work is determined. The comparative calculation of spatial models in the LIRA SOFTWARE is conducted.

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Zhuravskyi, Oleksandr, and Andriy Gorobetc. "Experimental and theoretical studies of biaxially prestressed steel-fiber-concrete slabs." USEFUL online journal 2, no. 3 (2018): 10–14. http://dx.doi.org/10.32557/useful-2-3-2018-0003.

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The article presents the results of experimental and theoretical studies of strength and deformability of steel-fiber concrete double-sided pre-stress slabs under the action of transverse loading. The simulation of such plates in the software complex LIRA-SAPR was performed taking into account the physical nonlinearity of materials.

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Saiyan, Sergey, and Alexander Paushkin. "Numerical Study of the Shear Stress Distribution in an I-Beam in the Load Application Zone." Materials Science Forum 974 (December 2019): 659–64. http://dx.doi.org/10.4028/www.scientific.net/msf.974.659.

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A study on the Saint-Venant principle implementation for a rigidly clamped I-beam loaded with various loads at the free end was carried out. When using the software package LIRA SAPR, the tangential stresses perturbations zones are determined in order to compare their distribution with the materials resistance solution.

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Krakovsky, Mikhail B., and Igor N. Tikhonov. "Implementation of calculations of normal sections of reinforced concrete structures in software packages." Concrete and Reinforced Concrete 620, no. 1 (2024): 5–13. http://dx.doi.org/10.37538/0005-9889-2024-1(620)-5-13.

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Introduction. In previous publications, the authors examined the features of calculating the strength of normal sections of reinforced concrete structures associated with the possibility of using two approaches – the nonlinear deformation model (NDM) and the method of limiting forces (MLF). Using specific examples, the results obtained with both approaches are compared. Cases of significant discrepancies in the consumption of selected reinforcement have been identified, trends have been explained, and the physical essence of the phenomenon has been analyzed. Calculations were performed according to the OM SNiP Reinforced Concrete program.  Aim. To analyze the implementation of features when using various computer programs for calculations of reinforced concrete structures, identify differences in results, establish their physical cause, evaluate economic aspects and problems, and make the necessary recommendations.  Materials and methods. The studies were performed for three types of structures. The first type included four sections of elements under two stress states: off-center compression (rectangular and annular) and oblique offcenter compression (rectangular and I-beam). The second type of structures included columns and pylons of a projected and constructed reinforced concrete building. The third type was an illustrative example – the T-section of the bent element at different operating moments and percentages of reinforcement. Calculations of the first type of structures were carried out by the authors by the OM SNiP Reinforced Concrete program, as well as the program developers of the Ing+, Arbat, Lira-SAPR, Lira 10, STARK ES programs. The calculation of structures of the second type was carried out by the authors by the OM SNiP Reinforced Concrete program and the designers by the Lira-SAPR 2022 program. The test example was calculated by the authors according to the OM SNiP Reinforced Concrete program.  Results. When calculating according to the NDM, a significant unjustified overspending of the required reinforcement was revealed compared to the calculation according to the MLF. In an illustrative example, the overspend is 220 %.  Conclusions. The general state of calculations of reinforced concrete structures should be recognized as requiring adjustments. To obtain a multibillion-dollar economic effect, it is proposed to provide in SP 63.13330.2018 two equal approaches to the calculation of normal sections of reinforced concrete structures - NDM and MLF. It is advisable to develop a document with a set of reference examples that allows you to get the same results for different programs with the same source data.

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Romaniuk, V. V., V. V. Supruniuk, and L. I. Bezniuk. "CALCULATION OF INTERMEDIATE SUPPORTING PARTS OF INSEPARABLE PERFORATED BEAMS IN THE SOFTWARE COMPLEX «LIRA»." Modern structures of metal and wood, no. 25 (August 2021): 130–38. http://dx.doi.org/10.31650/2707-3068-2021-25-130-138.

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Due to the simplicity of design and manufacture, as well as reliability during operation, beams are one of the most common elements used in industrial, civil and public construction. The most rational cross-section of metal beams are rolled I-beams with inclined or parallel inner faces of the shelves, the predominant use of which is due to the value of the core distance, which is twice as much the same value for a rectangular section and almost three times for a round section. This figure is even higher for perforated profiles obtained from conventional rolling beams, which allow you to compose sections with increased values of moments of inertia and moments of resistance without increasing material consumptions. For inseparable beams, an additional significant factor influencing on their bearing capacity, is the structural design of the intermediate support part. The aim of these researches is to study the stress-strain state of inseparable perforated beams of I-beam profile of different heights in areas near the intermediate support, the design of which is made without a transverse stiffening rib placed on the axis of the support, and with unwelded holes to the left and right of the support under the action of evenly distributed load in the software complex "Lira". The objectives of the study are to establish the actual values of stresses and strains in the characteristic cross sections of the inseparable perforated I-beam, which occur on the intermediate support, and perform a comparative analysis of numerical studies obtained in the software complex "Lira" for intermediate support node beams of different heights for actions of different magnitudes of loads. The analysis of the obtained diagrams of normal stresses was carried out, which showed that for the proposed design of the support part of the beam, the cross-sections with holes directly to the left and right of the support are calculated. The conclusion about necessity of carrying out further experimental-theoretical researches of various types of support parts of beams for the purpose of development of a complex technique of their calculation and recommendations on definition of rational scope of application of each of them is formulated.

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Purdenko, Roman, Roman Maiboroda, Nina Rashkevich, and Yurii Otrosh. "Development of a Numerical Model of the "Soil-Foundation-Building" System." Applied Mechanics and Materials 924 (December 30, 2024): 191–99. https://doi.org/10.4028/p-5oeggb.

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The aim of this work is to develop a numerical model and perform numerical simulations of avalanche-like collapse of buildings and structures in case of fire and explosions, taking into account the peculiarities of soil performance and its properties. The LIRA-SAPR software is a promising tool for calculations and modelling.

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Zhuravskyi, Oleksandr, and Dmytro Smorkalov. "Investigation of single- and double-layer slabs supported on four sides." USEFUL online journal 2, no. 4 (2018): 44–55. http://dx.doi.org/10.32557/useful-2-4-2018-0005.

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Presented method and results of experimental research of deflection of single-layer and two-layer slabs influenced by short-term lateral load. Proposed method of calculation based on the limit equilibrium method, calculation of slab deflections values by LIRA-CAD bundled software. The comparison of experimental and theoretical results of the calculation of deflections slabs.

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Nguyễn, Hiệp Đồng. "Tính toán chuyển vị ngang của khung phẳng bê tông cốt thép có kể đến phi tuyến vật liệu bằng phần mềm Lira-Sapr 2017". Vietnam Institute for Building Science and Technology 2022, vi.vol4 (2022): 3–10. http://dx.doi.org/10.59382/j-ibst.2022.vi.vol4-1.

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The horizontal load greatly affects the horizontal displacement of the top of the reinforced concrete frame, especially for the frame with small stiffness. In high-rise buildings, it is necessary to check whether the horizontal displacement of the top of the building and the story drift is satisfied or not. This paper introduces the investigation of the influence of lateral loads on the horizontal displacement of the top of the reinforced concrete flat frame with regard to material nonlinearities using Lira-Sapr software. Therefrom, comment on the difference between the analysis of reinforced concrete frames with regard to material nonlinearity with the analysis according to the elastic.

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Bayaliev, A. J., T. K. Makulov, and D. Niyazali u. "DEVELOPMENT OF A METAL FRAME FOR A SPORTS COMPLEX IN THE FORM OF A YURT." Herald of KSUCTA n a N Isanov, no. 2-2020 (July 6, 2020): 268–74. http://dx.doi.org/10.35803/1694-5298.2020.2.268-274.

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This article describes the development of a metal frame for a sports complex in the form of a yurt. For the calculation, constant and variable loads are specified that correspond to a given region (the metal structure's own weight, payload, snow cover load and seismic effects). The calculation was performed on the Lira 9.6 software package.

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Chepurnenko, Anton, Dmitriy Vysokovskiy, Elizaveta Rusakova, Vladimir Vanja, and Serdar Yazyev. "Axisymmetric bending of a circular three-layer plate taking into account creep." E3S Web of Conferences 281 (2021): 01005. http://dx.doi.org/10.1051/e3sconf/202128101005.

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The article discusses a method for calculating three-layer plates, in which a lightweight viscoelastic material acts as a middle layer. The technical theory of three-layer structures is used. The derivation of the resolving equation, the numerical and analytical solution of the problem, as well as comparison with the solution in the LIRA software package are presented.

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Lapina, Anastasia, Ivan Zotov, Anton Chepurnenko, and Batyr Yazyev. "Calculation of beams with corrugated wall on the stability of a flat bending shape." E3S Web of Conferences 97 (2019): 04067. http://dx.doi.org/10.1051/e3sconf/20199704067.

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The article presents the method of calculating beams with a corrugated wall on the stability of a flat bending shape. The problem reduces to a differential equation of fourth order with respect to the twist angle. The solution is performed numerically by the finite difference method. A comparison of the results with the software package LIRA is presented.

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Pidgurskyi, Mykola, Ivan Pidgurskyi, Mykola Stashkiv, et al. "Peculiarities of studying the stress-strain state of structural steel perforated beams using the finite element method." Scientific journal of the Ternopil national technical university 111, no. 3 (2023): 126–38. http://dx.doi.org/10.33108/visnyk_tntu2023.03.126.

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The advantages and disadvantages of perforated beams are analyzed, the areas of their application during construction and reconstruction of buildings and structures are given. A comparative assessment of the stress-strain state of cellular beams using a modified mesh of elements was carried out using the finite element method in the specialized software packages ANSYS, SolidWorks, LIRA.

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Akullu, Cissy, Joseph Katende, Wopotela D. Kisombo, and Ambrose Asiimwe. "IMPACT OF LUMBER SPINE PAIN ON THE QUALITY OF LIFE AND WORK PERFORMANCE AMONG HEALTH WORKERS WITH OCCUPATIONAL EXPOSURE AT LIRA REGIONAL REFERRAL HOSPITAL-LIRA CITY.A CROSS-SECTIONAL STUDY." SJ Orthopaedic Research Africa 1, no. 11 (2024): 7. https://doi.org/10.51168/23dv8175.

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Background: Objectives: To find out the impact of lumber spine pain on the quality of life and work performance among health workers with occupational exposure at Lira Regional Referral Hospital-Lira City. Methods: The study employed a descriptive, cross-sectional study design to find quantitative data. self-administered questionnaires and structured interviews were used to obtain data. The data was captured and analyzed using statistical package for social science (SPSS) version 20 software, summarized in frequency, and percentages, and presented in tables and charts. Results: Of 45 health workers who were interviewed,35 (77.8%) reported always experiencing work-related stress, 5 (11.1 %) reported that they never, and 5(11.1%) experienced it rarely. Based on respondents’ ratings of their psychological well-being, the highest 20 (44.4%) rated as fair with 5 (11.1%) rated poor, excellent 10(22.2%), and 10(22.2) rated good. When interviewed about whether they were aware of the potential risks of lumber spine pain associated with their occupation,32 (71.1%) reported not being aware and 13 (28.9%) reported awareness. Conclusion: The impact of lumber spine pain on the quality of life and work performance among health workers with occupational exposure at Lira Regional Referral Hospital-Lira City always experiencing work-related stress, being unsatisfied with the job tasks, and reduced psychological well-being Recommendation: The government should recruit more Health Workers, and lower the working hours to ensure all health workers get adequate resting periods before they can resume work

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Lira, Edvaldo Santos de, and Walison Paulino de Araújo Costa. "Investigating students’ engagement and motivation within the context of the Pedagogical Residence Program." Revista Linguagem em Foco 15, no. 1 (2023): 111–31. http://dx.doi.org/10.46230/2674-8266-15-7920.

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This article aims at reflecting on how the Pedagogical Residence Program (PRP) clears the way for residents to be conscious of the importance of promoting activities which students could be motivated and engaged in. As such, an analytical eye is turned upon six reflective reports, written by two residents, participants of the Spanish/English Group from the Department of Modern Foreign Languages at Federal University of Paraíba. In these reports, the residents discussed a sequence of activities that they proposed to a high school group. It is investigated how students’ motivation and engagement are described in their writings, as well as how residents employed strategies to get the students involved in the activities. The discussion relies on concepts, such as motivation (BROPHY, 2010; BROWN, 2000; DORNYEI, 1994; GARDNER, 1985; MITCHELL; SCHUSTER; JIN, 2020), class observation, the Pedagogical Residence Program (ANDRADE; SANTOS; FONSECA, 2019; BIAZI; GIMENEZ; STUTZ, 2011; LIRA; LIMA; MEDRADO, 2019; LIRA; MEDRADO; COSTA, 2020), and second language learning (LORENZUTTI, 2014; CUNHA, 2016). Results suggest that, although the residents faced challenges, they could create strategies which helped the students to feel motivated and, consequently, to engage in the activities proposed. Finally, it was also possible to observe the development of the residents’ sense of responsibility for a reflective teaching attitude that regarded students as active beings, taking their needs into consideration from planning to evaluation.

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Anday S, Issaias, Rynkovskaya Marina, Habte D. Yohannes, and Rahel L. Kahsay. "Structural Performance Comparison of Structural Systems Using LIRA and ETABS." E3S Web of Conferences 410 (2023): 03010. http://dx.doi.org/10.1051/e3sconf/202341003010.

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This paper investigates a comparison of structural systems of high rise (96m of 30 stories) buildings subjected to gravity load and wind load of speed 90mph. Three structural systems, Moment frame system, Shear wall system, and Tube-in-Tube system of identical base area and loadings are structurally designed, in ETABS and LIRA software. Linear wind response analysis was carried out as per ASCE 7-05. Parameters like fundamental time period, Maximum story displacement, Maximum column axial load and Vertical floor displacement are considered in this study. As per the findings, the maximum story displacement is found to be within the allowable limiting value. Tube-in-Tube system shows a better performance from the other systems for minimizing the story displacement. The modal time period, vertical displacement and Maximum column axial load values are also minimum in Tube -in-tube system.

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LAVROVA, Olga, and Marina ZHELTOVA. "EXAMINATION OF THE STATE OF THE CULTURAL HERITAGE OBJECT OF THE ST. JOHN THE EVANGELIST CATHEDRAL IN SARANSK." Expert Theory and Practice, no. 3(26) (September 30, 2024): 63–66. https://doi.org/10.51608/26867818_2024_3_63.

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The article considers an examination of the state of the cultural heritage object, St. John the Evangelist Cathedral in Saransk. The examination showed damage to the supporting structures of the vault. Calculation of damaged structures was carried out using the LIRA-FEM software complex. Based on the analysis of the calculation results, recommendations for strengthening the structural elements of the building are given.

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Bobalo, Taras, Yaroslav Blikharskyy, Pavlo Krainskyi, and Myhailo Volynets. "Computer Modelling of RC Beams Reinforced with High Strength Rebars and Steel Plate." Quality Production Improvement - QPI 1, no. 1 (2019): 304–10. http://dx.doi.org/10.2478/cqpi-2019-0041.

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Abstract The use of computers provides the opportunity to analyse and design complex structures, taking into account the geometric and physical nonlinearity of construction materials. In the article the study of stress-strain state of mixed steel-concrete beams, were presented. The results of this study showed that the method of calculation according to designe codes gave satisfactorily results of calculated strength compared with experiments. However, these methodes do not provide complete information of structural performance at all levels of load. For a more complete study of the stress-strain state and the physical nature of the processes occurring in steel-concrete structures reinforced with a mixed reinforcement, the calculation method using “Lira” software complex is proposed. The method of calculation is based on the finite element method. The calculation is made taking into account physical nonlinearity and real diagrams of σ-ε of materials using the nonlinear deformation law №14 of “Lira” software complex. The proposed method of calculation allows to determine the values of bearing capacity, the development of deformations and the beginning of crack formation, as well as stresses at all load levels.

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Andreev, Vladimir, and Lyudmila Polyakova. "Calculation of radial inhomogeneity cylindrical shell when exposed to high temperatures by numerical-analytical method and fem." E3S Web of Conferences 135 (2019): 01037. http://dx.doi.org/10.1051/e3sconf/201913501037.

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The purpose of the work is to compare two calculation methods using the example of solving the axisymmetric thermoelasticity problem. The calculation of a thick-walled cylindrical three-layer shell on the temperature effect was carried out by the numerical-analytical method and the finite element method implemented in the LIRA-CAD software package. In the calculation, a piecewise linear inhomogeneity of the shell due to its three-layer structure and continuous inhomogeneity caused by the influence of a stationary temperature field is taken into account. The numerical-analytical method of calculation involves the derivation of a resolving differential equation, which is solved by the sweep method, it is possible to take into account the nonlinear nature of the deformation of the material using the method of successive approximations. To solve this problem by the finite element method, a similar computational model of the shell was constructed in the LIRA-CAD software package. The solution of the problem of thermoelasticity for an infinite cylinder (under conditions of a plane deformed state) and for a cylinder of finite length with free ends is given. Comparison of the calculation results is carried out according to the obtained values of ring stresses.

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Kotenko, M. P., I. F. Razveeva, S. A. Ivanchenko, and A. A. Fedchishena. "Regulation of the Natural Oscillations Parameters of a Building Spatial Frame in the LIRA Software." Modern Trends in Construction, Urban and Territorial Planning 1, no. 2 (2022): 33–39. http://dx.doi.org/10.23947/2949-1835-2022-1-2-33-39.

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Introduction. In recent years many researchers have become interested in applying the various types of finite element method to studying of the buildings oscillation problems. In recent decades the finite element method is being successfully used for natural oscillations analysis along with the physical modeling. The scaled physical modeling and experimental approaches are also suitable for solving the complex problems. The main aim of our research is to identify the dependence of dynamic characteristics of a building frame on geometric characteristics of the frame elements. The objective of this research is to make an analysis and overview of the topic, to determine the scientific deficit, to conduct numerical and experimental studies, to formulate conclusions, to model and analyse the results. The scientific novelty consists in the possibility to use the obtained data on building frame natural oscillations depending on the geometric characteristics of the frame elements as an optimal rigidness ratio. The practical significance of the research consists in development of specific analytical relations for choosing a building frame design solution with an optimal natural frequencies parameter to be used in design and construction practice.Materials and methods. The creation and calculation of the finite element model was carried out in the LIRA software package.Results. As a result of calculation the frequencies and periods of building frame natural oscillations were obtained.Discussion and conclusions. Based on the results of the building natural oscillations analysis the conclusion was made that by changing the frame elements rigidity it’s possible to select its dynamic characteristics to find the optimal design solution of structures.

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Romashkina, Maryna, Bohdan Pisarevskyi, and Olekii Zhuravlyov. "Analysis of the building on the air shock wave by direct dy-namic method (with LIRA-FEM soft-ware)." Building constructions. Theory and Practice, no. 14 (July 2, 2024): 147–60. http://dx.doi.org/10.32347/2522-4182.14.2024.147-160.

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Calculation of the impact of air shock waves on buildings is extremely important for our country, which is in a state of war. Studying the structural safety and survivability of load-bearing reinforced concrete structures under influence is an important task, especially for critical infrastructure facilities. A blast scenario can be carried out directly in an FEA program as a time history analysis evaluate varying levels of structural damage and to minimize loss of life.The article is devoted to the features of the calcula-tion of buildings under the influence of air shock waves using the finite element method using the LIRA-FEM software complex. The features of ex-plosive loads, typical shock wave parameters, and the order of analysis for explosive loads are taken into consideration. The primary distinctions be-tween shock or explosion impacts and regular loads are explained. In-depth consideration is given to the problems of determining shock wave parameters and how they affect structures. Also included are the techniques for evaluating structures for explosive impacts.Using LIRA-FEM software, a preliminary analysis of the explosion resistance of a one-story building with a metal frame and sheet metal wall infill is carried out. It is demonstrated how to define impulse loads from a shock wave to the side walls, roofs, rear walls, and walls facing the explosion. The article describes the peculiarities of the "Time History Analysis" system in the LIRA-FEM program for ex-plosion dynamics problems.This analysis helps in the assessment of risks in the design of protective structures, development of pro-ject solutions and conducting research in the field of explosion safety.

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Omelian, Maksym. "Finite-element two-stage modelling of stress-strain state parameters of a planar truss with parallel chords." Mechanics and Advanced Technologies 8, no. 4(103) (2024): 405–12. https://doi.org/10.20535/2521-1943.2024.8.4(103).315657.

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This paper investigates a planar truss with parallel belts made of VCt3ps steel. The stress-strain state (SSS) of such a truss is studied using a two-stage numerical modelling method based on the application of LIRA-SAPR 2016 R5 and ANSYS Workbench 14.5 software packages.The main problem is to improve the accuracy of determining the parameters of the stress-strain state of flat trusses, which will reduce their material consumption and design complexity. This will facilitate the optimization of manufacturing processes in construction and engineering.The paper proposes a two-stage modelling methodology that involves the use of two software packages. At the first stage, a finite-element model is created in LIRA-SAPR, where the preliminary parameters of the SSS are determined. At the second stage, this model was detailed in ANSYS Workbench. Critical zones in the truss nodes where stresses are maximum were identified, which is key for further design.The modelling efficiency is due to the integration of data from both software packages. This makes it possible to compensate for the limitations of each of them separately, in particular in modelling nodes with stress concentrations. The methodology provides visibility of the stress-strain state parameters, which contributes to the effective analysis of the data obtained.The work demonstrates the effectiveness of a two-stage approach to modelling the stress-strain state, which has made it possible to achieve efficiency in determining the parameters of the stress-strain state of a truss. The combination of LIRA-CAD and ANSYS allows to effectively take into account both the overall strength characteristics of the structure and local deformations and stress concentration zones.The results of the study can be applied in the construction of industrial and public buildings, bridges, as well as in other industries, including mechanical engineering, where parallel girders are used. The methodology ensures the optimisation of material costs and labour costs during design, which is critical for large-scale engineering projects.

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Timchenko, R. O., D. A. Krishko, and V. O. Savenko. "Simulation of the contact interaction of the retaining wall with the base using the LIRA 9.6 software package." Mining Journal of Kryvyi Rih National University, no. 106 (2019): 36–42. http://dx.doi.org/10.31721/2306-5435-2019-1-106-36-42.

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Barabash, Maria S., Anatol V. Pikul, and Olga Bashynska. "THE MODELING OF STRUCTURAL ENFORCEMENT BY COMPOSITE MATERIALS ON “LIRA-SAPR”." International Journal for Computational Civil and Structural Engineering 13, no. 1 (2017): 34–41. http://dx.doi.org/10.22337/2587-9618-2017-13-1-34-41.

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This paper provides detailed suggestions for process of modeling the structural reinforcement by composite materials on the software package "LIRA-SAPR". It provides the implementation of bearing capacity checks for reinforced elements on the program called "ESPRI". The article offers an algorithm for calculation the construction objects in case of the changing of design situation, taking into account the modeling of the composite structure reinforcement. It considers the modeling process of reinforcement of structures using classical methods, such as using of metal casing. In the article you can also find a numerical modeling example of the frame structure reinforcement, with the selection and verification of the composite material. It considered the process of modeling the bearing capacity increasing with using the classical methods, namely the increase of the metal hooping. The article investigates the example of a numerical simulation of the frame bearing capacity increasing with the selection and verification of the composite material. Using the finite element method a mathematical model of the frame structure was constructed. In the frame work it was taken into account the occurrence of the bearing capacity increasing by composite materials in some elements. It compared the kinematic characteristics and effort that have arisen within the frame design model with static analysis, also taking into account physical nonlinearity in the calculation and enhancing certain elements reinforced with composite material. Also in this paper we describe a method of modeling the bearing capacity increasing with using the metal hooping.The calculation of reinforced element is made on the program called ESPRI, followed by an analysis of the overall calculation model work on the software package "LIRA-SAPR". The result of the article is a comparison and analysis of the stress-strain state of the considered computational model for various problem formulations. The results could be used for wider application in the study of methods for increasing the bearing capacity of buildings and structures.

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Barabash, M. S., I. V. Genzerskyi, А. V. Pikul А.V., and О. Yu Bashynska. "METHODS OF MODELING OF COMPOSITE MATERIALS AND COMPOSITE STRUCTURES ON «LIRA-SAPR»." ACADEMIC JOURNAL Series: Industrial Machine Building, Civil Engineering 1, no. 48 (2017): 129–37. http://dx.doi.org/10.26906/znp.2017.48.786.

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This paper provides detailed suggestions for the process of structural reinforcement modeling by composite materials on the software package «LIRA-SAPR». It also provides the implementation of bearing capacity checks for reinforced elements on the program called «ESPRI». The article offers an algorithm for calculation of the construction objects in case of design situation changing, considering the modeling of the composite structure reinforcement. It considered the modeling process of reinforcement of structures using classical methods, such as using of metal casing. It also investigated a numerical modeling example of the frame structure reinforcement, with the selection and verification of the composite material.

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Krasnitskyi, Petro, and Maksym Lobodanov. "NONLINEAR MODELING AND ANALYSIS OF DAMAGED REINFORCED CONCRETE BEAMS USING ANSYS AND LIRA-SAPR SOFTWARE PACKAGES." Theory and Building Practice 2024, no. 2 (2024): 39–49. http://dx.doi.org/10.23939/jtbp2024.02.039.

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This article presents a comparative analysis of the nonlinear behavior of a reinforced concrete beam with damaged reinforcement in the tension zone under a gradually increasing load until failure. The experimental beam, measuring 2100 mm × 200 mm × 100 mm, consists of a 20 mm diameter rebar in the tension zone, two 6 mm diameter rebars in the compression zone, and 6 mm diameter stirrups spaced 75 mm apart for transverse reinforcement. Nonlinear calculations were performed using ANSYS and LIRA-SAPR, with identical initial conditions applied to both models for accurate comparison. The study focuses on key aspects such as result accuracy, ease of use, and time required for nonlinear calculations, including material and geometric nonlinearity. By highlighting the strengths and weaknesses of each software, the research offers insights for engineers and researchers working on complex structural modeling of reinforced concrete.

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Puch-Solis, Roberto, and Tim Clayton. "Evidential evaluation of DNA profiles using a discrete statistical model implemented in the DNA LiRa software." Forensic Science International: Genetics 11 (July 2014): 220–28. http://dx.doi.org/10.1016/j.fsigen.2014.04.005.

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Journal articles on the topic 'Lira software'

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