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Steel and Composite Structures Volume 24, Number 4, July20 2017 , pages 425-439 DOI: https://doi.org/10.12989/scs.2017.24.4.425 |
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Static behavior of steel tubular structures considering local joint flexibility |
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Yamin Wang, Yongbo Shao and Yifang Cao
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| Abstract | ||
| As a thin-walled structure, local joint flexibility (LJF) in a tubular structure is prominent, and it may produce significant effect on the static performance for the overall structure. This study presents a simplified analytical model to analyze the static behavior for a steel tubular structure with LJF. The presented model simplifies a tubular structure into a frame model consisted of beam elements with considering the LJFs at the connections between any two elements. Theoretical equations of the simplified analytical model are deduced. Through comparison with 3-D finite element results of two typical planar tubular structures consisted of T- and Y-joints respectively, the presented method is proved to be accurate. Furthermore, the effect of LJF on the overall performance of the two tubular structures (including the deflection and the internal forces) is also investigated, and it is found from analyses of internal forces and deformation that a rigid connection assumption in a frame model by using beam elements in finite element analysis can provide unsafe and inaccurate estimation. | ||
| Key Words | ||
| tubular structure; local joint flexibility (LJF); simplified analytical model; theoretical equations; static behavior | ||
| Address | ||
| (1) Yamin Wang, Yongbo Shao: School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, P.R. China; (2) Yifang Cao: Center for Infrastructure Engineering, School of Computing, Engineering and Mathematics, Western Sydney University, NSW 2751, Australia. | ||