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Structural Engineering and Mechanics Volume 24, Number 3, October20 2006 , pages 323-347 DOI: https://doi.org/10.12989/sem.2006.24.3.323 |
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Simulations of the hysteretic behavior of thin-wall cold-formed steel members under cyclic uniaxial loading |
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Jun Dong, Shiqi Wang and Xi Lu
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| Abstract | ||
| In this paper, the hysteretic behaviors of channel and C-section cold-formed steel members (CFSMs) under cyclic axial loading were simulated with the finite element method. Geometric and material nonlinearities, Bauschinger effect, strain hardening and strength improvement at corner zones were taken into account. Extensive numerical results indicated that, as the width-to-thickness ratio increases, local buckling occurs prematurely. As a result, the hysteretic behavior of the CFSMs degrades and their energy dissipation capability decreases. Due to the presence of lips, the hysteretic behavior of a C-section steel member is superior to that of its corresponding channel section. The intermediate stiffeners in a C-section steel member postpone the occurrence of local buckling and change its shapes, which can greatly improve its hysteretic behavior and energy dissipation capability. Therefore, the CFSMs with a large width-to-thickness ratio can be improved by adding lips and intermediate stiffeners, and can be used more extensively in residential buildings located in seismic areas. | ||
| Key Words | ||
| hysteretic behavior; thin-wall cold-formed steel members; cyclic loading; finite element method; cold-formed steel framed residence. | ||
| Address | ||
| Jun Dong; Research Institute of Steel Structures, Nanjing University of Technology, Nanjing, 210009, China Shiqi Wang; Metallurgical Design Institute of Shandong Province, Jinan, 250014, China Xi Lu; Research Institute of Steel Structures, Nanjing University of Technology, Nanjing, 210009, China | ||