Global stability of laser-welded stainless steel I-section columns

被引：0
|
作者：
Ran H. [1 ,2 ]
Chen Z. [1 ]
Ma Y. [3 ]
机构：
[1] School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an
[2] Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education (XAUAT), Xi’an
[3] China Northwest Architecture Design and Research Institute Co., Ltd, Xi’an
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷 / 01期
关键词：
axially compressed member; FEA; laser welding; load-carrying capacity; residual stress; stainless steel; static test;
D O I：
10.14006/j.jzjgxb.2021.0593
中图分类号：
学科分类号：
摘要：
To investigate the global stability and load-carrying capacities of laser-welded austenitic stainless steel I-section columns, ten laser-welded stainless steel slender I-section specimens under axial compression were tested, and the failure mode and load-carrying performance were analyzed. The results showed that all the ten tested column specimens failed in a combination of local buckling and flexural buckling. Meanwhile, based on the residual stress test, the existing residual stress pattern of laser-welded stainless steel I-section was verified. The finite element model was validated against the test results and then employed to perform parametric studies, where the effects of initial geometric imperfections and residual stress on the behavior of laser-welded stainless steel I-section columns under axial compression were evaluated. The results revealed that the residual stress is the primary influencing factor on the behavior of the columns. The obtained test and FE results were then adopted to assess the accuracy of the relevant design rules given in the current Chinese standard CECS 410: 2105. Considering the influence of the residual stress pattern, the calculation coefficients of the global stability design formula for axial compression members in CECS 410: 2015 were revised. The CECS 410: 2015 design approach with the proposed calculation coefficients was shown to offer accurate resistance predictions for laser-welded stainless steel I-section columns under axial compression. © 2023 Science Press. All rights reserved.
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页码：121 / 131
页数：10
相关论文
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