冷弯不锈钢方矩管腹板压跛极限承载力  

Web Crippling Capacity of Cold-Formed Stainless Steel SHS and RHS

作　　者：战科江 李海汀 王淼[1,2] 周锋[3] 赵金城[1,2] ZHAN Kejiang;LI Haiting;WANG Miao;ZHOU Feng;ZHAO Jincheng(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure,Shanghai Jiao Tong University,Shanghai 200240,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]上海交通大学上海市公共建筑和基础设施数字化运维重点实验室,上海200240 [3]同济大学土木工程学院,上海200092

出　　处：《上海交通大学学报》2023年第12期1619-1630,共12页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(52008243);上海市青年科技英才扬帆计划(20YF1419600)资助项目。

摘　　要：为研究国产冷弯不锈钢方矩管局部承压下的腹板压跛极限承载力,采用有限元软件Abaqus建立了有限元模型,基于试验结果验证了模型的准确性;进一步通过224组参数分析算例计算了不同材料、截面尺寸、承压长度的冷弯不锈钢方矩管在各典型荷载工况下的腹板压跛极限承载力;基于参数分析算例结果,对既有腹板压跛设计方法的适用性进行了评估.结果表明:我国《冷弯型钢结构技术规范》(征求意见稿)计算公式对冷弯不锈钢方矩管的腹板压跛极限承载力预测精度较差,美国《冷弯不锈钢结构设计规范》(SEI/ASCE 8-22)及文献中直接强度法的计算结果准确且安全,可用于国产冷弯奥氏体和双相型不锈钢方矩管的腹板压跛极限承载力验算.This paper investigates the ultimate capacities of domestic cold-formed stainless steel square and rectangular hollow sections(SHS and RHS)undergoing web crippling.The finite element(FE)software Abaqus was employed during the investigation.It verifies the validity of FE models against experimental results available in the literature and performs an extensive parametric study comprised of 224 FE analyses to obtain the web crippling capacities of cold-formed stainless steel SHS and RHS,considering various materials,cross-sectional dimensions,bearing lengths and loading conditions in the parametric study.Based on the obtained FE results,the applicability of existing web crippling design provisions to domestic cold-formed stainless steel SHS and RHS is evaluated.The results indicate that the technical code of cold-formed steel structures(exposure draft)cannot be used for the studied cold-formed stainless steel SHS and RHS.On the other hand,it is shown that the American Specification SEI/ASCE 8-22 and proposed direct strength method(DSM)can lead to safe and accurate design predictions.Therefore,the SEI/ASCE 8-22 and DSM can be used to predict the capacities of domestic cold-formed stainless steel SHS and RHS undergoing web crippling.

关 键 词：不锈钢 冷弯型钢 腹板压跛 局部承压 设计方法 

分 类 号：TU392[建筑科学—结构工程]