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1
Danatzko, Joseph M., Halil Sezen, and Qian Chen. "SUSTAINABLE DESIGN AND ENERGY CONSUMPTION ANALYSIS FOR STRUCTURAL COMPONENTS." Journal of Green Building 8, no. 1 (April 2013): 120–35. http://dx.doi.org/10.3992/jgb.8.1.120.
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The engineering community has been striving to design more sustainable buildings in an attempt to reduce both environmental impact and energy use during all phases of design, construction and operation. Design professionals currently have very limited guidance or tools to incorporate life-cycle and sustainability concepts into their designs. After reviewing the capabilities and limitations of four current life cycle analysis (LCA) computer programs, this research has selected the Athena Impact Estimator v4.0 to perform parametric studies of structural members made up of different construction materials. The energy consumption values are calculated and compared for columns, beams, concrete suspended slabs, precast double-tee sections and various other floor types. While Athena did offer some insights based on its LCA results, this research has concluded that existing LCA and sustainability analysis programs have too few options to meet the current needs of design professionals. A more accurate, sophisticated whole-building LCA tool needs to be developed to assess sustainable properties of design alternatives and to produce the most sustainable structural systems.
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WILLIAMS, ROM, A. C. CASSELL, and L. F. BOSWELL. "A COMPUTER DESIGN AID FOR PRESTRESSED CONCRETE BOX BEAMS." Proceedings of the Institution of Civil Engineers - Structures and Buildings 94, no. 1 (February 1992): 61–72. http://dx.doi.org/10.1680/istbu.1992.18144.
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WILLIAMS, R. O. M., A. C. CASSELL, L. F. BOSWELL, and P. WALDRON. "DISCUSSION. A COMPUTER DESIGN AID FOR PRESTRESSED CONCRETE BOX BEAMS." Proceedings of the Institution of Civil Engineers - Structures and Buildings 99, no. 2 (May 1993): 237–38. http://dx.doi.org/10.1680/istbu.1993.23382.
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Mokhtar, Abdel‐Salam A., and Amin Ghali. "Computer Analysis and Design of Concrete Beams and Grids." Journal of Structural Engineering 114, no. 12 (December 1988): 2669–91. http://dx.doi.org/10.1061/(asce)0733-9445(1988)114:12(2669).
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Akhras, George, and John A. Fedoruk. "A prototype knowledge-based expert system for the design and detailing of reinforced concrete beams." Canadian Journal of Civil Engineering 18, no. 6 (December 1, 1991): 1005–12. http://dx.doi.org/10.1139/l91-123.
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Most computer programs developed for reinforced concrete beam design either analyze a given cross section for load capacity or offer a limited solution from which the engineer must continue toward the final design. These programs are very useful in performing many tedious calculations. However, they generally do not offer assistance in areas of design that require intuitive reasoning, experiential knowledge, rules of thumb, and sound engineering judgement. This type of heuristic knowledge has been incorporated into a prototype knowledge-based expert system for reinforced concrete beam design and detailing called BeamEx. BeamEx interacts with the user to advise and establish suitable parameters required for the comprehensive design of rectangular simply supported and continuous beams. It incorporates heuristic rules drawn from the governing Canadian codes and textbooks to design alternative suitable beams which are presented in graphical form. It is shown that a knowledge-based system approach can be used effectively in engineering design by encapsulating domain expertise in a program to complement and check the experience of the users in design. Key words: knowledge-based expert system, reinforced concrete, beams, design, detailing.
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Bacinskas, Darius, Deividas Rumsys, Aleksandr Sokolov, and Gintaris Kaklauskas. "Deformation Analysis of Reinforced Beams Made of Lightweight Aggregate Concrete." Materials 13, no. 1 (December 19, 2019): 20. http://dx.doi.org/10.3390/ma13010020.
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In the present trend of constructing taller and longer structures, the application of lightweight aggregate concrete is becoming an increasingly important advanced solution in the modern construction industry. In engineering practice, the analysis of lightweight concrete elements is performed using the same algorithms that are applied for normal concrete elements. As an alternative to traditional engineering methods, nonlinear numerical algorithms based on constitutive material models may be used. The paper presents a comparative analysis of curvature calculations for flexural lightweight concrete elements, incorporating analytical code methods EN 1992-1 and ACI 318-19, as well as a numerical analysis using the constitutive model of cracked tensile lightweight concrete recently proposed by the authors. To evaluate the adequacy of the theoretical predictions, experimental data of 51 lightweight concrete beams of five different programs reported in the literature were collected. A comparison of theoretical and experimental results showed that the most accurate predictions are obtained using numerical analysis and the constitutive model proposed by the authors. In the future, the latter algorithm can be used as a reliable tool for improving the design standard methods or numerical modeling of lightweight concrete elements subjected to short-term loading.
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Elbadry, Mamdouh M., and Amin Ghali. "Analysis of time-dependent effects in concrete structures using conventional linear computer programs." Canadian Journal of Civil Engineering 28, no. 2 (April 1, 2001): 190–200. http://dx.doi.org/10.1139/l00-093.
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Analysis of the time-dependent changes in displacements, internal forces, and reactions at the supports in continuous reinforced concrete structures cast, prestressed, and loaded at different stages is frequently needed in design to satisfy the serviceability requirements. The time-dependent parameters considered in the analysis are creep and shrinkage of concrete, relaxation of prestressed steel, sequence of construction, and changes in structural system and support conditions. A procedure of analysis is presented using conventional linear analysis computer programs. The analysis procedure is explained through examples to demonstrate its simplicity and applicability.Key words: analysis, computer program, creep, displacement, frames, precast concrete, prestressed concrete, relaxation, shrinkage, time-dependent.
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Bujnak, Jan, Peter Michalek, and Wieslaw Baran. "Experimental and theoretical investigation of composite truss beams." MATEC Web of Conferences 174 (2018): 04001. http://dx.doi.org/10.1051/matecconf/201817404001.
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The design specifications of composite trusses are only partially included in the European standards. However this construction system can be considered as one of the most economical for building and bridge structures. To create an interaction between steel and concrete, it is necessary to prevent the relative slip at the steel and concrete interface using the shear connectors. But the local effects of a concentrated longitudinal shear force between steel truss chord and concrete slab, as special task, should be appropriately examined. The finite element analyses can be used to investigate numerically this structural system behaviour, exploiting several computer procedures. The experimental research has tested these procedures. The outputs of this study are presented in the paper.
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JARZABEK, STAN, HONGYU ZHANG, SHEN RU, VU TUNG LAM, and ZHENXIN SUN. "ANALYSIS OF META-PROGRAMS: AN EXAMPLE." International Journal of Software Engineering and Knowledge Engineering 16, no. 01 (February 2006): 77–101. http://dx.doi.org/10.1142/s0218194006002689.
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Meta-programs are generic, incomplete, adaptable programs that are instantiated at construction time to meet specific requirements. Templates and generative techniques are examples of meta-programming techniques. Understanding of meta-programs is more difficult than understanding of concrete, executable programs. Static and dynamic analysis methods have been applied to ease understanding of programs — can similar methods be used for meta-programs? In our projects, we build meta-programs with a meta-programming technique called XVCL. Meta-programs in XVCL are organized into a hierarchy of meta-components from which the XVCL processor generates concrete, executable programs that meet specific requirements. We developed an automated system that analyzes XVCL meta-programs, and presents developers with information that helps them work with meta-programs more effectively. Our system conducts both static and dynamic analysis of a meta-program. An integral part of our solution is a query language, FQL in which we formulate questions about meta-program properties. An FQL query processor automatically answers a class of queries. The analysis method described in the paper is specific to XVCL. However, the principle of our approach can be applied to other meta-programming systems. We believe readers interested in meta-programming in general will find some of the lessons from our experiment interesting and useful.
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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 (July 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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Liang, Xiao, and Sri Sritharan. "Use of unstressed strands for connections of precast concrete members." PCI Journal 66, no. 3 (2021): 49–66. http://dx.doi.org/10.15554/pcij66.3-03.
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Precast concrete members need to be connected effectively to form an integral structural system. Use of unstressed strands provides a cost-effective and practical solution to reinforce the connection regions of precast concrete members, especially for precast concrete bridge girder applications. With the limited understanding of bonding characteristics for unstressed strands, a combination of experimental and analytical programs, which focused on unstressed strands as a connection between precast concrete girders and cap beams for seismic applications, was designed to investigate the fundamental load-transfer characteristics of unstressed strands anchored in grout and concrete based on pullout tests. The relationship between strand stress and loaded-end displacement was developed, and the bond stress of unstressed strands embedded in concrete and grouted duct was examined. The average bond stress of unstressed strands anchored in concrete and grouted duct is recommended to be five and seven times the square root of concrete compressive strength, respectively. The results of this research provide qualitative embedment length requirements to design connections between precast concrete members using unstressed strands.
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Hartono, Widi, Sugiyarto, Sofa Marwoto, and Budi Laksito. "Computer Program for Reinforced Concrete Bar Bending Schedulling to Increase Efficiency of Reinforcement." Applied Mechanics and Materials 845 (July 2016): 332–37. http://dx.doi.org/10.4028/www.scientific.net/amm.845.332.
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The construction project consists of several components, one of them is a reinforced concrete. Reinforced concrete construction contributes to 30% of the total budget or 80% of the total civil work. Meanwhile, judging from the proportion provided by the use of steel reinforcement reaches 45% of the contribution of the use of reinforced concrete. The use of steel reinforcement that is not planned well lead to cost overruns and the resulting increase in waste production. The waste is unlikely to be used again because the length does not qualify the existing needs. In terms of environmentally wasteful use of steel reinforcement is not aligned with the slogan green construction. According to the Environmental Product Declaration (EPD) in 2012 the production of steel reinforcement produces CO2 gas 430 kg CO2 eq /ton. On the other hand, local contractors in Surakarta never planning the use of steel reinforcement. Contractors plans and cuts of reinforcement. It increase potential construction waste due to inaccurate planning. Therefore in this study are create a computer program to design a model of bending reinforcing steel. Finally, steel reinforcement planning are better obtained. This program is applied to create a Visual Programming software, ACAD, Crystal Report, and Microsoft Database. Visual Programming is used as a place store of scripts and programs to connect database and Crystal Report. Microsoft database used to store data and Crystal Report are employed to display the results of the program. Furthermore, scheduling program of bar bender can be created. the time of production of reinforcement detailed is faster. By inputing a cross-section measurements and information reinforcement used various bending of reinforcement pieces are produced automatically. Crystal Report output can be made a flexible and attractive form to look at as well as the ability to transfer to other programs such as MS Word, Excel and PDF. Output can display different forms of reinforcement pieces with illustrated picture and the required amount of steel reinforcement in accordance with the dimensions and types.
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Li, Zhong-Xian, Bo Zhong, Yanchao Shi, Yang Ding, and Yifei Hao. "A computationally efficient numerical model for progressive collapse analysis of reinforced concrete structures." International Journal of Protective Structures 10, no. 3 (June 13, 2019): 330–58. http://dx.doi.org/10.1177/2041419619854768.
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Although marked advancements have been achieved to improve the computer power, progressive collapse analysis of large-scale reinforced concrete structures is still time-consuming or even impractical. In this study, a numerical model is proposed for efficient progressive collapse analysis of reinforced concrete structures. Recent advancements that can accurately and efficiently model the mechanical behavior of structural components are incorporated in the numerical model of reinforced concrete structure. The beams/columns, joint regions, and slabs are modeled by enhanced fiber beam element, macrojoint model, and layered shell element, respectively. In this way, the shear failure of beams/columns, failure of joints, and resistance contribution from floor slab can be taken into account for progressive collapse analysis of reinforced concrete structures. A six-story reinforced concrete frame structure is modeled using the approach proposed in this study. The progressive collapse of the structure is analyzed under column removal and direct blast loading scenarios. For comparison purpose, other popularly used finite element models are also adopted to carry out numerical simulations. The proposed model is proven to yield accurate simulation results with the least cost of time among all models. Based on the proposed model, parametric simulations are performed to investigate effective measures to improve the structural resistance to progressive collapse. It is found that increasing longitudinal reinforcement ratio in beams and columns can increase the catenary action capacity, but hardly increases the compressive arch action capacity. Moreover, the steel mesh reinforcement at top layer of slabs plays a significant role in resisting progressive collapse of reinforced concrete structures, which should be considered in design to resist progressive collapse.
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Taric, Mirsad, and Emir Maslak. "Impact of the number of coupling points on values of composite beams deformations." Facta universitatis - series: Architecture and Civil Engineering 9, no. 3 (2011): 511–23. http://dx.doi.org/10.2298/fuace1103511t.
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Technological development, thanks to which high-performance materials were produced, allowed engineers to design elegant structures, which in the total load have smaller share of dead weight. All this gave an opportunity to bridge the large spans. Technological development is accompanied by the development of powerful computer software that is able to, in the phase of construction modelling, include many parameters. Thanks to that, designers have a better insight into how elements behave under load, and they are able to choose how to use material and exploit their good characteristics. Composite structures, formed by coupling of steel and concrete, rank among the modern structures. Their advantage lies in the fact that the steel part of the cross-section takes part in tensile stresses transfer, while the concrete part, because of its massiveness, takes part in compressive stress transfer. Redistribution of stresses in one composite cross-section depends on many factors. In this paper, using finite element method, the influence of number coupling points on the deformation of simply supported beam, with a composite cross-section was analyzed. The span of the beam is 5m.
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Kelpša, Šarūnas, Gediminas Rinkevičius, Tadas Zingaila, Mindaugas Augonis, and Vadimas Kitovas. "Coefficient of Moment of Inertia for Ribbed RC Slab Beams." Mechanics 25, no. 3 (July 1, 2019): 178–86. http://dx.doi.org/10.5755/j01.mech.25.3.22691.
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During the design process of monolithic ribbed slabs, engineers face a common issue how to correctly evaluate stiffness of the beams. When Bar and Plate elements are used for analysis of the slabs, the neutral axis of those members are in the same level, therefore the stiffness of (T) shape cross-section is not considered correctly in the calculations. In this case the internal forces are obtained incorrectly as well as deflections of the beams are overestimated. A simple method is discussed in this paper, which allows engineers to calculate internal forces and deformations of mentioned type slabs more accurately with FEM programs by using Bar and Plate elements. The method is based on Bar elements moment of inertia adjustment. After the comparative analysis of differences between moment of inertia of (T) and (+) shape cross-sections as well as deflection discrepancies, the adjustment coefficient expression is presented. In order to reflect the actual behaviour of ribbed slabs even more accurately the influence of shear deformations is also considered. In this case not only the member geometry but the material properties, loading scheme and even supports are taken into account in the calculations of the adjustment coefficient. Selection of the most appropriate (effective) flange width of (T) shape cross-section is also analysed in this paper. Comparative calculations were done using different effective flange widths beff calculated by EC2 (Eurocode 2), “STR” (Lithuanian Construction Technical Regulations) and ACI (American Concrete Institute) methods. In order to assess the reliability of the proposed calculation method and the calculation results all plates were also analysed using Solid elements. Application of the presented expressions of moment of inertia coefficient will allow engineers to evaluate stiffness of (Γ) and (T) shape cross section beams simply, fast and accurately enough for most of structural engineering calculations.
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Aloisio, Angelo. "Aspects of Vibration-Based Methods for the Prestressing Estimate in Concrete Beams with Internal Bonded or Unbonded Tendons." Infrastructures 6, no. 6 (June 2, 2021): 83. http://dx.doi.org/10.3390/infrastructures6060083.
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The estimate of internal prestressing in concrete beams is essential for the assessment of their structural reliability. Many scholars have tackled multiple and diverse methods to estimate the measurable effects of prestressing. Among them, many experimented with dynamics-based techniques; however, these clash with the theoretical independence of the natural frequencies of the forces of internally prestressed beams. This paper examines the feasibility of a hybrid approach based on dynamic identification and the knowledge of the elastic modulus. Specifically, the author considered the effect of the axial deformation on the beam length and the weight per unit of volume. It is questioned whether the uncertainties related to the estimate of the elastic modulus and the first natural frequency yield reasonable estimates of the internal prestressing. The experimental testing of a set of full-scale concrete girders with known design prestressing supports a discussion about its practicability. The author found that the uncertainty in estimating the natural frequencies and elastic modulus significantly undermines a reliable estimate of the prestressing state.
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Jian, Zhang, Jia Chao, and Tian Jiawei. "Nonlinear Performance of Concrete Beam Reinforced with Prestressed Hybrid Cfrp/Gfrp Composite Sheet." Advanced Composites Letters 27, no. 5 (September 2018): 096369351802700. http://dx.doi.org/10.1177/096369351802700505.
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The consolidation technology of prestressed hybrid fibre CFRP/GFRP sheet takes full advantages of the initiative of the prestressed reinforcement and force transferring of the composite materials features, which belongs to relatively advanced reinforcement strategies in reinforcement area. This paper derives nonlinear composite element and shell element to simulate concrete beam and the prestressed hybrid fibre CFRP/GFRP sheet. Besides, the characters of nonlinear concrete beams are described by the Owen yielding criterion and the Hinton crushing criterion. Meanwhile, the three-dimensional prestressing effects of the composite CFRP/GFRP materials have been realized and the nonlinear finite element computer program of reinforced system has been compiled. In order to determine the best stress condition of prestressed hybrid fibre CFRP/GFRP composite materials, the optimal hybrid CFRP/GFRP ratio is achieved through the systematic calculation based on two main properties which take the strength and ductility properties into consideration. The results show that the optimal CFRP/GFRP hybrid ratio is one of the major factors to impact its mechanical properties of the reinforced structure which has been strengthened by the prestressed hybrid fibre CFRP/GFRP sheet. And the theoretical method and calculation model that determine the optimal hybrid CFRP/GFRP ratio in this paper is reasonable and reliable. The research conclusions can be used as a reference in practice construction design.
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SARMENTO, C. V. S., A. O. C. FONTE, L. J. PEDROSO, and P. M. V. RIBEIRO. "From numerical prototypes to real models: a progressive study of aerodynamic parameters of nonconventional concrete structures with Computational Fluid Dynamics." Revista IBRACON de Estruturas e Materiais 13, no. 3 (June 2020): 628–43. http://dx.doi.org/10.1590/s1983-41952020000300012.
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Abstract The practical evaluation of aerodynamic coefficients in unconventional concrete structures requires specific studies, which are small-scale models evaluated in wind tunnels. Sophisticated facilities and special sensors are needed, and the tendency is for modern and slender constructions to arise with specific demands on their interaction with the wind. On the other hand, the advances obtained in modern multi-core processors emerge as an alternative for the construction of sophisticated computational models, where the Navier-Stokes differential equations are solved for fluid flow using numerical methods. Computations of this kind require specialized theoretical knowledge, efficient computer programs, and high-performance computers for large-scale calculations. This paper presents recent results involving two real-world applications in concrete structures, where the aerodynamic parameters were estimated with the aid of computational fluid dynamics. Conventional quad-core computers were applied in simulations with the Finite Volume Method and a progressive methodology is presented, highlighting the main aspects of the simulation and allowing its generalization to other types of problems. The results confirm that the proposed methodology is promising in terms of computational cost, drag coefficient estimation and versatility of simulation parameters. These results also indicate that mid-performance computers can be applied for preliminary studies of aerodynamic parameters in design offices.
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Liang, Huiqi, Wenbo Xie, Peizi Wei, Yang Zhou, and Zhiqiang Zhang. "The Effect of the Decorative Surface Layer on the Dynamic Properties of a Symmetric Concrete Slab." Symmetry 13, no. 7 (June 29, 2021): 1174. http://dx.doi.org/10.3390/sym13071174.
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In the past few years, the immense advances in building materials and construction techniques have inspired the development of large span, light, and flexible structures with low damping. The low frequency and low damping properties of the mentioned structures result in the problem of serviceability caused by human-induced vibrations. An evaluation of the serviceability of a structure requires obtaining the modes and natural frequencies of the structure via the finite element method (FEM). In the design stage, the structural model considers the contribution of involved elements made to the stiffness of the whole structure, such as beams, slabs, and columns, while the decorative surface layer above the floor is often regarded as an additional mass, regardless of its contribution to the stiffness of the floor slab. In this study, the dynamic properties of a symmetric concrete slab were tested with an ambient excitation method to obtain the dynamic properties of the original empty structure and the structure decorated with a tiled surface, a marble surface, and a terrazzo surface, respectively. The results show that the first-order natural frequencies of floor slabs decorated with tile, marble, and terrazzo finishes are decreased compared to the original empty structure, while the second- and third-order ones are increased, which indicates that it is improper to treat decorative finishes purely as an additional mass. By equating the decorative layer to a certain thickness of additional concrete layer in the finite element model, it is found that, if the decorative surface layer is equated to a 29–31mm thick additional layer and the weight of the equivalent additional layer is the same as that of the actual decorative surface, the simulation results will be in good agreement with the measured results. Moreover, the test results indicate that the first-order shape function of the structure is symmetric and its second- and third-order shape functions are antisymmetric, which is consistent with the results of simulations under FEM method. This provides a basis for designers to evaluate the contribution of the additional layers in structural serviceability analysis.
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Rusin, R. M. "POSTMODERN AS AN ARCHITECTURAL PRACTICE." UKRAINIAN CULTURAL STUDIES, no. 1 (6) (2020): 89–94. http://dx.doi.org/10.17721/ucs.2020.1(6).17.
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Of all movements in art and architecture history, postmodernism is perhaps the most controversial. Postmodernism was an unstable mix of the theatrical and theoretical. It was visually thrilling, a multifaceted style that ranged from the colourful to the ruinous, the ludicrous to the luxurious. What they all had in common was a drastic departure from modernism's utopian visions, which had been based on clarity and simplicity. The modernists wanted to open a window onto a new world. Postmodernism, by contrast, was more like a broken mirror, a reflecting surface made of many fragments. Its key principles were complexity and contradiction. In the architecture of postmodernism in the 1970s and 1990s saw widespread experimentation with architectural styles from the past that modernism had excluded. Postmodernism lived up to its central aim: to replace a homogenous idiom with a plurality of competing ideas and styles. Postmodernism shattered the established ideas about style. It brought a radical freedom to art and architecture, through gestures that were often funny, sometimes confrontational and occasionally absurd. Most of all, the architecture of postmodernism brought a new self-awareness about style itself. When architects began using high-powered software created for the aerospace industry, in the design phase, computer programs can organize and manipulated the relationships of a building's many interrelated parts. In the building phase, algorithms and laser beams define the necessary construction materials and how to assemble them. Combining new ideas with traditional forms, postmodernist buildings may startle, surprise, and even amuse. Familiar shapes and details are used in unexpected ways. Buildings may incorporate symbols to make a statement or simply to delight the viewer. The main characteristics of postmodernism in its various manifestations are highlighted, such as absolute relativism, the denial of truth as a metaphysical false value, the existence of which is nonsense, a manifestation of a totalitarian type of thinking.
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Uglova, Evgenia, and Olga Shilo. "Analysis of the criteria for calculating non-rigid pavements in conditions of intense traffic flow." Russian journal of transport engineering 5, no. 3 (September 28, 2018). http://dx.doi.org/10.15862/14sats318.
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Domestic methods of designing and calculating non-rigid pavements were modified in parallel with changes in the load-carrying capacity of vehicles and an increase in the average traffic intensity of cars. With the increase in the level of costs for the construction and repair of road clothes, the level of responsibility for design has increased. However, more often at the operational stage, early defects of asphalt-concrete layers are detected and premature reduction of the bearing capacity of the structure as a whole. This only indicates that the prediction of the service life in the design of traditional methods is not reliable. The reasons for this may be several: erroneous determination of the number of cycles of the annual loading of the structure, a distorted or ineffective consideration of the climatic conditions of operation of the road-building materials of the layers, an inaccurate technique for determining the maximum permissible and emerging deformations, and also accumulating them during operation. As a result, the issues of construction of road clothes, requirements for them and the design of highways in general are being revised. Obviously, the traditional method of calculation, as a minimum, can not be considered universal. The authors presented a new approach to calculating the strength of non-rigid pavements by the criterion of accumulation of fatigue damages of asphalt-concrete layers, which can provide reliable prediction of the pavement life cycle, because it is based on the multifactorial influence of external environmental impact. Modeling such a multifactor process as the life cycle of a design is a complex computational task. Active integration of computer technologies into modern life and construction processes allows solving this task with the help of a computer, by developing application programs. At the department of «Highways» DSTU developed a software package Pavement Life Cycle, able to make calculations based on a new criterion for calculating non-rigid road clothes. The article is part of the dissertation research of the second author.