考虑局部稳定影响的不锈钢圆管短柱轴压承载力试验研究  

Experimental study on local stability of stainless steel tubular stub columns under axial compression

作　　者：柳子涵 杨璐 袁焕鑫[3] 代鹏[1,2] LIU Zihan;YANG Lu;YUAN Huanxin;DAI Peng(The Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Centre of High-rise and Large-span Prestressed Steel Structures,Beijing University of Technology,Beijing 100124,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]北京工业大学北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124 [3]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《建筑结构学报》2023年第12期225-232,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51922001);国家自然科学基金创新研究群体项目(51421005)。

摘　　要：为研究不锈钢轴心受压圆管的局部稳定承载性能,对9根奥氏体型不锈钢圆管短柱、7根双相型不锈钢圆管短柱以及作为对比的3根Q355圆钢管短柱进行轴心加载试验,得到了不锈钢轴压短柱的破坏模式和局部稳定承载力。研究发现短柱均发生局部失稳破坏,径厚比是影响轴心受压短柱承载力的重要因素。将局部稳定承载力试验结果与欧洲不锈钢结构设计规范EN 1993-1-4、美国冷成型钢结构设计规范AISI S100-2016、美国钢结构建筑规范ANSI/AISC 360、美国不锈钢建筑结构规范ANSI/AISC 370-21中的设计方法进行对比,结果表明:对于径厚比较小的不锈钢圆管短柱,四种规范的预测承载力较为保守;对于部分径厚比较大的不锈钢圆管短柱,规范预测承载力偏于危险。To study the local stable bearing capacity of stainless steel axially compressed tubular tubes,nine austenitic,seven duplex and three Q355 tubular stub columns for comparison were tested under axial loading,and the failure mode and local stable bearing capacity of stainless steel stub columns were analyzed.The results indicate that all stub columns have local buckling,and the diameter to thickness ratio has considerable effect on the load-carrying capacity of axially compressed stub columns.The test bearing capacity were compared with the bearing capacity design method in European design manual for structural stainless steel EN 1993-1-4,North American specification for the design of cold-formed steel structural members AISI S100-2016,American specification for structural steel buildings ANSI/AISC 360,and specification for structural stainless steel buildings ANSI/AISC 370-21.The results show that the predicted values of bearing capacity about smaller diameter and thickness ratio in the four codes are conservative,and the predicted values of some members with large diameter and thickness ratio are not conservative.

关 键 词：不锈钢圆管 局部稳定 静力试验 轴压承载性能 

分 类 号：TU391[建筑科学—结构工程] TU317.1