开口冷弯厚壁型钢轴压构件抗震性能研究  

Research on the seismic behaviors of opening cold-formed thick-walled steel under the axial cyclic loading

作　　者：付小超[1] 李元齐[1] 沈祖炎[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《河北工程大学学报（自然科学版）》2016年第3期1-7,共7页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金项目(51178330)

摘　　要：为研究开口冷弯厚壁型钢构件在轴向滞回荷载作用下的抗震性能,首先选取了3根壁厚t〉6 mm的冷弯内卷边槽钢进行轴向滞回试验,然后建立相关的ANSYS有限元模型进行模拟计算,在与试验结果对比的基础上,选取了不同的腹板宽厚比（h/t=25-90）、绕弱轴长细比（λy=30-90）的构件进行参数化分析计算。研究结果表明：宽厚比、长细比是影响冷弯型钢抗震性能的两个主要因素,宽厚比（h/t）越大抗震性能越差,长细比（λy）越大抗震性能同样也越差,设计时应尽量避免选择长细比和宽厚比均较大的构件。In order to investigate the hysteretic behaviors of opening cold- formed thick- walled steel members under the axial cyclic loading,three cold- formed steel columns were tested. On the basis of compared with the test results,a finite element method（ FEM） in ANSYS was established. The influence of width- thickness ratio（ h / t） rang from 25 to 90 for web and slenderness ratio about the weak axis y（ λy） rang from 30 to 90 of such members were investigated by FEM. Analysis results indicated that the width- thickness ratio and the slenderness ratio about the weak axis y are the most important factors to affect the hysteretic behaviors. So,the cold- formed steels which with great width- thickness ratio（ h / t） and great slenderness ratio（ λy） should be avoided in designing,because they will lead to poor seismic performance.

关 键 词：冷弯厚壁型钢 滞回 抗震性能 宽厚比 长细比 

分 类 号：TU392.1[建筑科学—结构工程]