In-plane global stability of hot-rolled stainless steel channel section beam-columns about minor axis

被引：0
|
作者：
Ran H. [1 ,2 ]
Jian L. [1 ]
Ma Y. [3 ]
Sun Y. [4 ]
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
[4] Department of Civil Engineering, Xi’an Jiaotong-Liverpool University, Suzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷 / 06期
关键词：
beam-columns; global stability; hot-rolled channel sections; stability load-carrying capacity; stainless steel; static experiment;
D O I：
10.14006/j.jzjgxb.2022.0004
中图分类号：
学科分类号：
摘要：
To investigate the global stability and load-carrying capacities of hot-rolled S30408 (EN1.4301) austenitic stainless steel channel section beam-columns about minor axis, 18 beam-column specimens under combined compression and minor-axis bending were tested. The initial geometric imperfections, loading eccentricities and residual stresses of the beam-column specimens were measured prior to the member tests. The finite element (FE) software ABAQUS was used to develop FE models for hot-rolled stainless steel channel section beam-columns, and the numerical models were validated against the test results and then employed to perform parametric studies. The effects of initial geometric imperfections and residual stresses on the behavior of hot-rolled stainless steel channel section beam-columns were evaluated. The obtained test and FE results were then adopted to assess the accuracy of the relevant design rules stipulated in the current Chinese standard CECS 410: 2015 ‘Technical specification for stainless steel structures’. Finally, an improved approach was proposed for the design of hot-rolled stainless steel channel section beam-columns under minor-axis combined loading. The results reveal that all the 18 tested beam-column specimens fail in a combination of minor-axis flexural buckling and in-plane bending, CECS 410: 2015 results in overall conservative predictions of the load resistance, the ratio of the test and FE results to the code design rules is 1.31 in the positive loading eccentricity cases, and is 1.21 but with some unsafe predictions in the negative loading eccentricity cases (i. e. tensile bending stresses occur in flange tips). The proposed design approach is proved to be able to give accurate resistance predictions for hot-rolled stainless steel channel section beam-columns under minor-axis combined loading. The ratio of the test and FE results to the proposed design approach is 1.07 for the positive loading eccentricity cases, and is 1.05 for the negative loading eccentricity cases. © 2023 Science Press. All rights reserved.
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页码：160 / 171
页数：11
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