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Gotowe bibliografie tematyczne / Beam stiffness

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Gotowa bibliografia na temat „Beam stiffness”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Beam stiffness"

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Zhu, Xiujie, Chao Xiong, Junhui Yin, Dejun Yin, and Huiyong Deng. "Equivalent stiffness prediction and global buckling analysis using refined analytical model of composite laminated box beam." Science and Engineering of Composite Materials 26, no. 1 (2019): 465–81. http://dx.doi.org/10.1515/secm-2019-0030.

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Abstract The analytical model applicable to calculate the equivalent stiffnesses of composite box beam has been refined. The calculation of equivalent stiffness coefficients of composite laminated box beam is simplified and the connection between shear-deformable beam theory and classical laminate theory is established. The equivalent stiffness analytic formulas expressed by beam cross-section geometry and laminate stiffness coefficients are obtained. These analytical formulas are suitable for composite laminated box beam with circumferential uniform stiffness, and accounts for bending- transv

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Tan, Hui Feng, and Zhen Yong Du. "Research on Equivalent Bending Stiffness of Conical Inflated Beam." Applied Mechanics and Materials 229-231 (November 2012): 444–48. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.444.

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The conical inflated beams have steady bending stiffness before wrinkles appear according to experimental load-deflection curve, then the deflection distribute function is derived based on the differential function of deflection with variable bending stiffness. The equivalent bending stiffness is presented while the conical inflated beam equates to cylindrical inflated beam, according to the deflection formula of beam, the model of equivalent bending stiffness of conical inflated beams is obtained. Comparing the equivalent bending stiffness of conical inflated beams between theoretical model a

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Luo, Ji Man, Yue Liu, Bin Li, and Xiao Wei Sun. "Study on the Influence of Different Supporting Point Stiffness on External Suspension Tower Crane and Supporting Structure." Advanced Materials Research 1025-1026 (September 2014): 991–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1025-1026.991.

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Supporting system of external suspension tower crane is the key factor which impairs the safety of the tower cranes. In this article, the problem is studied about the influence of different supporting point stiffness on the force of the tower crane external suspension. Based on the structural mechanics theory, the displacement of the lower statically indeterminate beam and the horizontal displacement of the upper statically indeterminate truss are solved firstly, then the stiffness of the supporting point on the lower beam and the entirety stiffness of the upper horizontal combination struts c

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Li, Yeou Fong, and Shu Ting Kan. "The Mechanical Behavior of the Hybrid FRP Beam." Advanced Materials Research 365 (October 2011): 119–24. http://dx.doi.org/10.4028/www.scientific.net/amr.365.119.

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This paper presents the mechanical behaviors of hybrid fiber reinforced plastic (HFRP) composite beams. There are two methods were proposed to increase the stiffness of pultruded glass fiber reinforced plastic (GFRP) beam and change the failure mode. The first method is to infill the epoxy mortar into the GFRP beam. The second method is hand layout the GFRP beam by using carbon fiber with different direction fibers to increase the stiffness of the GFRP beam. Three-point bending test was conducted to obtain the force-displacement relationship, stiffness, failure strength and failure mode of the

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Muhtar. "The Prediction of Stiffness Reduction Non-Linear Phase in Bamboo Reinforced Concrete Beam Using the Finite Element Method (FEM) and Artificial Neural Networks (ANNs)." Forests 11, no. 12 (2020): 1313. http://dx.doi.org/10.3390/f11121313.

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This paper discusses the reduction of the stiffness of bamboo reinforced concrete (BRC) beams to support the use of bamboo as an environmentally friendly building material. Calculation of cross-section stiffness in numerical analysis is very important, especially in the non-linear phase. After the initial crack occurs, the stiffness of the cross-section will decrease with increasing load and crack propagation. The calculation of the stiffness in the cross-section of the concrete beam in the non-linear phase is usually approximated by giving a reduction in stiffness. ACI 318-14 provides an alte

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Zhou, Mi, and Yue Zhang. "The Experimental Study on Fracture and Damage Mechanism of RC T-Beam." Key Engineering Materials 452-453 (November 2010): 661–64. http://dx.doi.org/10.4028/www.scientific.net/kem.452-453.661.

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In order to research the stiffness degradation mechanism of RC T-beam under the condition of different damage and get the influence law of damage degree on dynamic characteristics of single beam, the dilapidated static and dynamic test on four pieces of RC simple T-beams is explained in the paper. Under different degree of damage these parameters of four pieces of RC simple T-beams with two kinds of reinforcement ratio, such as crack, mid-span deflection, basic frequency, dynamic stiffness, static stiffness are measured. The frequency and stiffness variation of RC T-beam is obtained. The funct

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Dr., R. M. Sawant, and A. Saudagar A. "Review on Structural Performance of Haunch Reinforced Concrete Beams." Journal of Civil and Construction Engineering (e-ISSN: 2457-001X) 5, no. 3 (2019): 43–49. https://doi.org/10.5281/zenodo.3463220.

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Beams are the most important part of any reinforced concrete structural frame as they carry bending moments and shear force coming from the member supported on it. Generally, beams used in construction of RCC frame structure are prismatic in section and more specifically rectangular in section. As there are many advantages of such beam in short span and medium span beam, they become very much thicker, weighted and bulky for the long span. Thus, they become inefficient and uneconomical. The haunch beam having varying cross-sectional area will be more efficient and economical for large span beam

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Fossat, Pascal, Madhurima Kothakota, Mohamed Ichchou, and Olivier Bareille. "Dynamic Bending Model Describing the Generation of Negative Stiffness by Buckled Beams: Qualitative Analysis and Experimental Verification." Applied Sciences 13, no. 16 (2023): 9458. http://dx.doi.org/10.3390/app13169458.

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This work addresses the dynamic modeling of a negative stiffness absorber consisting of an assembly of curved beams. Design rules are derived from the orders of magnitude of stiffness and elastic energy stored by the negative stiffness elements. Although static and dynamic performances are widely documented using equivalent spring–mass system equations of motion, this paper presents a modeling approach based on beam dynamics to predict the behavior by incorporating the generation of negative stiffness with prestressed Euler beams. The static behavior is first recalled to feed the dynamic beam

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Chen, Hai Xia. "Analysis of Slab and Beam’s Moment Influenced by Stiffness Ratio." Applied Mechanics and Materials 166-169 (May 2012): 329–32. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.329.

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In this paper ,taking industrial factory building , the size of 33 * 19.8 m2 for example, analyzes Integral reinforced concrete floor system under the loads by Finite element analysis software ANSYS. In the calculation process, beam element is beam4, slab element is shell63, Changing the line stiffness ratio of beam and slab, main beam and secondary beam, researches of moment on the main beam and the secondary beam by means of line stiffness ratio. It is showed that , when the value of line stiffness ratio is more than 10, mid-span moment is fewer obviously with the Increasing K ; when the val

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R, Manimaran. "Composite Delta Beam for Slim Floor Construction." International Journal for Research in Applied Science and Engineering Technology 12, no. 3 (2024): 382–88. http://dx.doi.org/10.22214/ijraset.2024.58811.

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Abstract: The structural behaviour of the composite Flush Beam for slim floor as a whole has been investigated. The deformation behaviour of the structural members Steel beams with trapezoidal cross-sections and specially punched webs were developed as composite beams in slim floors. The estimation of the flexural stiffness and bending capacity of composite slim beams is rather complicated, because the influence of many factors should be taken into account. These factors include variable section dimensions, Profile of the beam, stiffness of the beam and interaction between steel and concrete.

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Rozprawy doktorskie na temat "Beam stiffness"

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Ahmed, Ishtiaque. "Semi-rigid action in steel frames." Thesis, University of Sheffield, 1992. http://etheses.whiterose.ac.uk/3025/.

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Andersson, Patrik. "Finite Element and Dynamic Stiffness Analysis of Concrete Beam-Plate Junctions." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198509.

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Measurements and predictions of railway-induced vibrations are becoming a necessity in today’s society where land scarcity causes buildings to be put close to railway traffic. The short distances mean an increased risk of the indoor vibration and noise disturbances experienced by residents. In short, the scope of the project is to investigate the transmission loss and vibration level decrease across various junction geometries. The junctions are modelled in both the Finite Element Method (FEM) and the Dynamic Stiffness Method (DSM). Resonances are avoided when possible by using semi-infinite b

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Muthirevula, Neeharika. "Cross-Sectional Stiffness Properties of Complex Drone Wings." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/73988.

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The main purpose of this thesis is to develop a beam element in order to model the wing of a drone, made of composite materials. The proposed model consists of the framework for the structural design and analysis of long slender beam like structures, e.g., wings, wind turbine blades, and helicopter rotor blades, etc. The main feature consists of the addition of the coupling between axial and bending with torsional effects that may arise when using composite materials and the coupling stemming from the inhomogeneity in cross-sections of any arbitrary geometry. This type of modeling approach all

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Melandri, Giovanni. "Study of a novel solution to obtain controllable stiffness for beam-like elements." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20196/.

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La presente tesi tratta dello studio di concetti volti all'ottenimento di strutture meccaniche a rigidezza variabile per applicazioni in ambito di ricerca scientifica, in particolare per una futura applicazione in un robot aereo ad ala battente, al fine di studiare l'interazione tra ala elastica ed aria. Vengono riassunti i metodi per ottenere rigidezza variabile ed, in seguito ad una fase di confronto basato su requisiti ed obiettivi di progetto, vengono scelte due soluzioni. Il lavoro mostra che il concetto "sliding segments" funziona bene per una trave composta da un'asta interna ed un tu

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Schniepp, Timothy John. "Design Manual Development for a Hybrid, FRP Double-Web Beam and Characterization of Shear Stiffness in FRP Composite Beams." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34550.

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Fiber-reinforced polymeric (FRP) composites are being considered for structural members in bridge construction as lighter, more durable alternatives to steel and concrete. Extensive testing and analysis of a pultruded, hybrid double web beam (DWB) developed for use in bridge construction has been conducted at Virginia Tech. A primary purpose of this testing is the development of a structural design guide for the DWB, which includes stiffness and strength data. The design manual also includes design allowables determined through a statistical analysis of test data. Static testing of the beam

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K, C. Ashim. "SLAB AND TRANSVERSE BEAM STIFFNESS EFFECT ON THE SEISMIC DESIGN OF MOMENT FRAME STRUCTURE." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2817.

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Structures experience a dynamic nature of the load, different from ordinary design loads during earthquake excitation. The response of the structure to earthquake loads depends on the properties of its structural as well as non-structural components. The objective of this study is to examine the effect of the slab and transverse beams on the dynamic response of the structure using the seismic design provisions of the latest building design codes. Structural analysis and design (Staad.Pro) software is used in this study to perform seismic analysis of four building models having identical sectio

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Espinosa, Diego Alejandro. "Moment-dependent pseudo-rigid-body models for beam deflection and stiffness kinematics and elasticity." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002943.

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Hayes, Michael David. "Structural Analysis of a Pultruded Composite Beam: Shear Stiffness Determination and Strength and Fatigue Life Predictions." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11066.

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This dissertation is focused on understanding the performance of a particular fiber-reinforced polymeric composite structural beam, a 91.4 cm (36 inch) deep pultruded double-web beam (DWB) designed for bridge construction. Part 1 focuses on calculating the Timoshenko shear stiffness of the DWB and understanding what factors may introduce error in the experimental measurement of the quantity for this and other sections. Laminated beam theory and finite element analysis (FEA) were used to estimate the shear stiffness. Several references in the literature have hypothesized an increase in the e

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Gupta, Sayan. "Vibration Analysis Of Structures Built Up Of Randomly Inhomogeneous Curved And Straight Beams Using Stochastic Dynamic Stiffness Matrix Method." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/224.

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Uncertainties in load and system properties play a significant role in reliability analysis of vibrating structural systems. The subject of random vibrations has evolved over the last few decades to deal with uncertainties in external loads. A well developed body of literature now exists which documents the status of this subject. Studies on the influence of system property uncertainties on reliability of vibrating structures is, however, of more recent origin. Currently, the problem of dynamic response characterization of systems with parameter uncertainties has emerged as a subject of inte

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Gupta, Sayan. "Vibration Analysis Of Structures Built Up Of Randomly Inhomogeneous Curved And Straight Beams Using Stochastic Dynamic Stiffness Matrix Method." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/224.

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Uncertainties in load and system properties play a significant role in reliability analysis of vibrating structural systems. The subject of random vibrations has evolved over the last few decades to deal with uncertainties in external loads. A well developed body of literature now exists which documents the status of this subject. Studies on the influence of system property uncertainties on reliability of vibrating structures is, however, of more recent origin. Currently, the problem of dynamic response characterization of systems with parameter uncertainties has emerged as a subject of inte

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Książki na temat "Beam stiffness"

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Smith, Ralph C. A fully Galerkin method for the recovery of stiffness and damping parameters in Euler-Bernoulli beam models. Institute for Computer Applications in Science and Engineering, 1991.

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Townsend, John S. Dynamic characteristics of a vibrating beam with periodic variation in bending stiffness. National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1987.

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Smith, Ralph C. A fully Galerkin method for the recovery of stiffness and damping parameters in Euler-Bernoulli beam models. National Aeronautics and Space Administration, Langley Research Center, 1991.

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Banks, H. Thomas. Computational methods for the identification of spatially varying stiffness and damping in beams. ICASE, 1986.

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Hamidan, Mohsen Azari. Torsinal stiffness of I section beams. UMIST, 1994.

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Roland, Hernandez, and Forest Products Laboratory (U.S.), eds. Strength and stiffness of reinforced yellow-poplar glued-laminated beams. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1997.

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Roland, Hernandez, and Forest Products Laboratory (U.S.), eds. Strength and stiffness of reinforced yellow-poplar glued-laminated beams. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1997.

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Strength and stiffness of reinforced yellow-poplar glued-laminated beams. U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1997.

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Treatise on the Strength, Flexure, and Stiffness of Cast Iron Beams and Columns. Creative Media Partners, LLC, 2023.

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Treatise on the Strength, Flexure, and Stiffness of Cast Iron Beams and Columns. Creative Media Partners, LLC, 2023.

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Części książek na temat "Beam stiffness"

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Gooch, Jan W. "Cantilever-Beam Stiffness." In Encyclopedic Dictionary of Polymers. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_1890.

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Fang, Miaomiao, Yuqi Wang, Jiaxin Liu, and Fan Sun. "Research on Support Damage of Highway Bridge Based on Midas." In Lecture Notes in Civil Engineering. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1260-3_30.

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AbstractDuring the operation of highway bridges, the bearing stiffness will decrease with the service life, and the mechanical properties will also change. In order to study the influence of stiffness damage on bearing. In this paper, a continuous beam bridge is selected for finite element model analysis, and the effects of stiffness damage on bearing force and bearing offset under the conditions of concrete shrinkage and creep and 30 °C temperature difference are comprehensively considered. The results show that the bearing stiffness damage has little influence on the vertical displacement, h

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Xu, Zhi-wei, Li-xia Lin, Nan-hong Ding, and Lei Chen. "The External Prestress Effect of Curved Tendons on the Natural Vibration Characteristics of Steel Beams." In Advances in Frontier Research on Engineering Structures. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8657-4_46.

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AbstractIn order to explore the external prestress effect of the curved tendons on the stiffness and natural vibration characteristics of the steel beam, this paper deduced the calculation equation of the natural frequency on the external prestressed simply supported steel beam of the curved arrangement, which was based on the Hamilton principle. The natural frequency is calculated by combining the example of I-shaped simply supported steel beam, which was analyzed and verified by establishing the finite element model. The results show that: the calculation of the equation is well demonstrated

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Sharma, Narayan, and Dipak Kumar Maiti. "Stochastic Frequency Analysis of Variable Stiffness Laminated Composite Beam." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6490-8_51.

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Ferreira, M., N. Peixinho, V. Carneiro, P. Ribeiro, J. Meireles, and D. Soares. "Stiffness and Damping Properties of a Composite Beam Design." In Materials Design and Applications III. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68277-4_8.

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Zhang, Jianxun, Pengchong Zhang, Huicun Song, and Lei Zhu. "Transverse Vibration Characteristics of Clamped-Elastic Pinned Beam Under Compressive Axial Loads." In Advances in Frontier Research on Engineering Structures. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8657-4_47.

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AbstractBased on the Bernoulli–Euler theory, the vibration characteristics of a clamped-elastic pinned beam under the elastic constraint and the compressive axial loads are derived and verified by finite element method. The results of examples show that the natural frequency of the beam decreases with loads increase and the frequency increases with the increase of the elastic constraint stiffness. When the constraint stiffness increases from 104 to 108 N/m, the first-order natural frequency becomes 4.24 times, the second-order natural frequency becomes 2.19 times, and the third-order natural f

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Khante, Suraj, and Pranav Nimkar. "Identification of Enhanced Stiffness of Beam by EMI Frequency Shift Technique." In Lecture Notes in Civil Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6463-5_11.

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Rosso, Marco M., Stefanos Sotiropoulos, Rita Greco, and Giuseppe Carlo Marano. "Steel Frames Optimization Considering Beam-Column Joint Stiffness and Geometric Constraints." In Lecture Notes in Civil Engineering. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-44328-2_14.

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Mukherjee, Paulomi, Lokesh Kant Sao, and Devesh Punera. "Flexural–Torsional Couplings in Thin-Walled Beam Sections Having Variable Stiffness." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9390-9_39.

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Wang, Y., S. M. Liao, Y. B. Liu, and J. C. Sun. "Longitudinal non-uniform equivalent stiffness beam model of prestressed shield tunnels." In Tunnelling into a Sustainable Future – Methods and Technologies. CRC Press, 2025. https://doi.org/10.1201/9781003559047-65.

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Streszczenia konferencji na temat "Beam stiffness"

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Walters, Laura, Hamid Reza Nasiri, Fei Tong, Lydell Wiebe, and Thomas Tannert. "IMPACTS OF BEAM HANGER ROTATIONAL STIFFNESS ON COLUMN RESISTANCE OF POST-AND-BEAM FRAMES." In World Conference on Timber Engineering 2025. World Conference On Timber Engineering 2025, 2025. https://doi.org/10.52202/080513-0484.

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Fei, Jinghao, Debao Chen, Hongkang Pan, and Chul‑Woo Kim. "Application of Neural Operator for Damage Identification of a Simply Supported Beam." In IABSE Symposium, Tokyo 2025: Environmentally Friendly Technologies and Structures: Focusing on Sustainable Approaches. International Association for Bridge and Structural Engineering (IABSE), 2025. https://doi.org/10.2749/tokyo.2025.1227.

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<p>This study presents the Modal-Stiffness Fourier Neural Operator (MS-FNO), a novel data-driven model for damage localization and quantification in structural health monitoring (SHM). The MS- FNO leverages modal shape response data to predict stiffness loss distributions. Validated on both numerical (NUM-Set) and experimental (EXP-Set) datasets, the model achieved exceptional accuracy, with relative L2Loss of 0.0011 on the NUM-Set and effective identification of relative stiffness loss (RSL) on the EXP-Set across various damage scenarios. The MS-FNO demonstrated robustness in localizing

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KATGERI, Anirudh R. "Variable stiffness characteristics of tapered curved beam." In Mechanical Engineering for Sustainable Development. Materials Research Forum LLC, 2025. https://doi.org/10.21741/9781644903438-41.

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Abstract. Variable Stiffness Actuators (VSA) are modern mechanical systems, designed to exhibit varying stiffness/compliance characteristics in response to the external forces. It is an essential sub-system in the fields of robotics, biomechanics and prosthetics. Key elements of VSAs are springs, cables, pneumatic units, variable transmission mechanisms etc., playing a crucial role in providing a reliable and effective performance. A Miniature type straight and curved leaf-springs are more commonly used elements. The development and demonstration of varying stiffness characteristic of non-tape

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Kahrobaiyan, M. H., M. Zanaty, and S. Henein. "An Analytical Model for Beam Flexure Modules Based on the Timoshenko Beam Theory." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67512.

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Short beams are the key building blocks in many compliant mechanisms. Hence, deriving a simple yet accurate model of their elastokinematics is an important issue. Since the Euler-Bernoulli beam theory fails to accurately model these beams, we use the Timoshenko beam theory to derive our new analytical framework in order to model the elastokinematics of short beams under axial loads. We provide exact closed-form solutions for the governing equations of a cantilever beam under axial load modeled by the Timoshenko beam theory. We apply the Taylor series expansions to our exact solutions in order

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Rivin, Eugene I., and Panchal Pankach. "Stiffness Enhancement of Metallic Beam-Like Components." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-0153.

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Abstract Stiffness is an important design criterion. Since bending deformations of structural components are much larger than tension/compression deformations under comparable loads, enhancement of bending stiffness of beam-like components is an important problem. Conventional techniques for stiffness enhancement (beefing up, optimization, use of high Young’s modulus materials) frequently do not achieve the desired results. The paper describes a novel approach to bending stiffness enhancement based on the inverse buckling effect. The beam is composed of the structural external member having an

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Fu, Jiaming, Han Lin, Wei Xu, and Dongming Gan. "A Novel Variable Stiffness Compliant Robotic Link Based on Discrete Variable Stiffness Units for Safe Human-Robot Interaction." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-89825.

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Abstract Variable stiffness manipulators balance the trade-off between manipulation performance needing high stiffness and safe human-robot interaction desiring low stiffness. Variable stiffness compliant links provide a solution to enable this flexible manipulation function in human-robot co-working scenarios. In this paper, we propose a novel variable stiffness link based on discrete variable stiffness units (DSUs). A DSU is a parallel guided beam that can adjust stiffness discretely by changing the cross-sectional area properties of the hollow beam segments. The variable stiffness link (nam

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Sarıahmet, Melike, and Oğuzhan Toğay. "A Design Perspective on the Stability of Timber Beams Under Lateral Torsional Buckling." In 7th International Students Science Congress. Izmir International guest Students Association, 2023. http://dx.doi.org/10.52460/issc.2023.015.

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Lateral torsional buckling (LTB) of timber beams is an important out-of-plane behavior mode due to large depth/width ratios and long span lengths, as in steel beams. A beam that is subjected to a lateral torsional buckling failure would deform under an applied load or moment until the critical moment (Mcr) is reached, after that, a slight increase in the applied moment will create large out-of- plane deformations, and the beam will buckle by deflecting laterally and twisting. If the compression zone of the beam is braced by using out-of-plane nodal lateral bracing, these deformations can be pr

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Sarıahmet, Melike, and Oğuzhan Toğay. "A Design Perspective on the Stability of Timber Beams Under Lateral Torsional Buckling." In 7th International Students Science Congress. Izmir International guest Students Association, 2023. http://dx.doi.org/10.52460/issc.2023.015.

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Lateral torsional buckling (LTB) of timber beams is an important out-of-plane behavior mode due to large depth/width ratios and long span lengths, as in steel beams. A beam that is subjected to a lateral torsional buckling failure would deform under an applied load or moment until the critical moment (Mcr) is reached, after that, a slight increase in the applied moment will create large out-of- plane deformations, and the beam will buckle by deflecting laterally and twisting. If the compression zone of the beam is braced by using out-of-plane nodal lateral bracing, these deformations can be pr

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Fu, Jiaming, and Dongming Gan. "A Reconfigurable Variable-Stiffness Parallel Beam for Compliant Robotic Mechanisms Towards Safe Human Interaction." In ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/detc2021-70226.

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Abstract To co-work with humans, robotic mechanisms need to have variable stiffness with high rigidity for performance and low compliance for safe interactions. This paper introduces a reconfigurable variable-stiffness parallel beam (VSPB) which can be used in both robotic joints and links for variable compliance. The VSPB is a compliant cantilever mechanism with hollow parallel beams in the middle and solid connections at both ends. Stiffness adjusting can be realized by changing the cross-sectional area property of the hollow beam segment discretely through a bistable mechanism block or cont

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Ramaratnam, Arun, Nader Jalili, and Matt Grier. "Piezoelectric Vibration Control of Translational Flexible Beams Using Switched Stiffness." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41217.

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A switch-shunt stiffness method for vibration attenuation of flexible beams undergoing translational base motion with a laminated piezoelectric patch attachment is presented. The piezoelectric actuator, bonded on the top surface of the flexible beam, is switched between open and short circuit configurations. This results in a variable equivalent stiffness which, in turn, can remove energy from the overall system by directly affecting the stored potential energy in the flexible beam. Initially, a single degree of freedom system is considered for validation of the switched stiffness method. The

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Raporty organizacyjne na temat "Beam stiffness"

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Hajj, Ramez, Marshall Thompson, Renan Santos Maia, et al. Updates to Mechanistic-Empirical Design Inputs for Illinois Flexible Pavements. Illinois Center for Transportation, 2024. http://dx.doi.org/10.36501/0197-9191/24-010.

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This study reviews the Illinois Department of Transportation’s full-depth asphalt, limiting strain criterion, and asphalt over rubblized concrete design procedures, considering technological advancements in hot-mix asphalt—namely, the increased use of recycled materials and modified asphalt binders. The researchers evaluated the current |E*| algorithm by conducting laboratory tests with four mix designs and seven asphalt binders of different Superpave performance grades. They compared predictive models, including the current Illinois modulus algorithm as well as the Witczak, Hirsch, and newly

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MECHANICAL BEHAVIOR AND CATENARY ACTION OF RESTRAINED STEEL BEAM UNDER FIRE. The Hong Kong Institute of Steel Construction, 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.8.

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To investigate the mechanical behavior and catenary action of restrained steel beam under fire, experiments were performed on five H-section restrained steel beams exposed to ISO-834 standard fire. At first, mechanical property tensile tests were performed on 3 room-temperature specimens and 8 high-temperature specimens, and variation laws of the material properties of steel materials with temperature rising were investigated by the high-temperature steady-state tests. Through the fire experiments, the temperature data, mid-span deflections and failure modes of all specimens were obtained. The

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EXPERIMENTAL STUDY ON CYCLIC BEHAVIOR OF BLIND-BOLT JOINT CONNECTING STEEL BEAM AND RECTANGULAR TUBE COLUMN. The Hong Kong Institute of Steel Construction, 2023. http://dx.doi.org/10.18057/ijasc.2023.19.2.1.

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An experimental investigation on the cyclic behavior of the joints for steel H-shaped beams to steel rectangular tube columns using end-plate and blind bolts is conducted in this paper. The load-bearing capacity, rotation stiffness and hysteretic behavior of the joints are studied. In terms of the types of beams (pure steel beam and composite steel beam with concrete slab) and columns (pure steel rectangular tube column and concrete-filled steel rectangular tube column), a total of four different joints are tested and compared. It is found that filling concrete in rectangular tube columns can

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STRESS RESPONSE AND INITIAL STIFFNESS OF SIDE PLATE CONNECTIONS TO WCFT COLUMNS. The Hong Kong Institute of Steel Construction, 2021. http://dx.doi.org/10.18057/ijasc.2021.17.3.9.

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To study the mechanism of load transfer in double-side-plate connections between I-beams and wall-type concrete-filled steel tubular columns, a pseudo-static experiment and finite element analysis were conducted for two full-scaled specimens. The results revealed that the primary load was transmitted along an S-shaped path in the side plate, and the primary strain occurred in an X-shaped region between the left and right steel beam flanges. The shear force in the steel beam web was transmitted first to the side plate centre and then to the joint area, where the side plate, steel tube web, and

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NONLINEAR ANALYSIS OF REINFORCED BEAM-COLUMN JOINTS WITH HIGH STRENGTH STEEL SINGLE-RIBBED PLATES. The Hong Kong Institute of Steel Construction, 2025. https://doi.org/10.18057/ijasc.2025.21.2.5.

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In recent years, with the continuous development and wide application of high-strength steel in the field of construction, the research on the performance optimization of beam-column joints in high-strength steel structures has become increasingly important. This study aims to investigate the hysteretic performance of high-strength steel single-ribbed reinforced beam-column joints. Based on high strength steel properties test and tensile test of welded joint plate, two reference groups are established: high-strength steel common beam-column joints and ordinary steel single-ribbed reinforced be

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NUMERICAL ANALYSIS AND EVALUATION OF EFFECTIVE SLAB WIDTH OF COMPOSITE CONTINUOUS BEAMS WITH SEMI-RIGID JOINT. The Hong Kong Institute of Steel Construction, 2021. http://dx.doi.org/10.18057/ijasc.2021.17.4.1.

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The characterization of the structural behavior of composite beams is directly affected by the determination of the effective slab width. Various codes propose their own definitions of the effective width based on the beam span and the slab width parameters. However, the evaluation of the effective width may be influenced by other parameters. The aim of this work is to determine the most important factors affecting effective width for continuous composite beams with semi-rigid joints using numerical simulations. A three-dimensional finite element model of a composite continuous beam using expl

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STUDY ON THE STATIC BEHAVIOR OF COLD-FORMED STEEL FABRICATED BEAM-COLUMN JOINT. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.310.

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This paper presents a new built-up beam-column joint with a spacer employed between channel sections under monotonic loading to study its static behavior. A validated finite element model was used to simulate the cold-formed steel (CFS) joint's moment-rotation behavior and failure mode by utilizing ABAQUS. It accounts for both material and geometrical nonlinearity. The model was further adopted to investigate the influence of bolt arrangement, spacing of intermediate connecting plates, diaphragms and various beam-column stiffness ratios on the joint behavior. The results indicate that the bolt

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RETROFIT EFFECT AND FLEXURAL CAPACITY OF H-SECTION BEAM- THROUGH BEAM-COLUMN CONNECTIONS FOR STEEL MODULAR FRAMES. The Hong Kong Institute of Steel Construction, 2025. https://doi.org/10.18057/ijasc.2025.21.2.4.

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Beam-through steel beam-column configurations are distinct from traditional column-through steel structures because they discontinue columns at each floor by bolting upper and lower columns to floor beam flanges. It facilitates modular manufacturing and floor/modular erection, which provides more opportunities for low to mid-level steel structures. Compared to its constructability superiority, beam-through configurations typically create a weaker beam-column joint than traditional beam-column connections adopted in the current building codes. In a numerical approach, this study investigates th

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ROTATIONAL STIFFNESS MODEL FOR SHALLOW EMBEDDED STEEL COLUMN BASES. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.308.

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Embedded steel column bases are normally idealized as fixed boundary condition in the analysis of steel frameworks. In practice, the embedded column bases sometimes have embedded depth notably smaller than that recommended by the structural design codes. In such a case, the fixed boundary assumption may overestimate the stiffness of the bases to a large extent. In light of this, this paper proposes a theoretical model for the accurate prediction of the rotational stiffness of the shallow embedded steel column bases, with the combined effects of key influencing factors, including the axial load

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EXPERIMENTAL AND NUMERICAL INVESTIGATION ON SEISMIC PERFORMANCE OF RING-BEAM CONNECTION TO GANGUE CONCRETE FILLED STEEL TUBULAR COLUMNS. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.9.

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This paper presents an investigation on seismic performance of a ring-beam connection that is used to connect reinforced gangue concrete (RGC) beam to coal-gangue concrete-filled steel tubular (GCFST) column. Two specimens, including an interior connection with two beams and an exterior connection with one beam, were designed and fabricated for experimental tests under full-reversing cyclic loads at beam ends. In addition, finite element models which corresponded to tested specimens were developed using ABAQUS to conduct numerical simulations of the composite connection subjected to the combin

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