开孔冷弯薄壁槽钢柱偏载稳定性能研究  

Stability behavior of cold-formed thin-walled channel column with holes under eccentric compression

作　　者：姚永红[1] 黄金炳 YAO Yong-hong;HUANG Jin-bing(School of Civil Engineering&Architecture,Anhui University of Science&Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001

出　　处：《河南城建学院学报》2022年第3期8-13,共6页Journal of Henan University of Urban Construction

基　　金：国家自然科学基金项目(51508001)。

摘　　要：为研究开孔冷弯薄壁卷边槽钢柱在偏载作用下的稳定性能,通过有限元方法对既有试验进行模拟分析以验证其可靠性,分析了孔洞、偏心距对试件的承载力、荷载位移曲线及屈曲失效模式的影响。结果表明:孔洞、偏心距的存在,改变了构件的屈曲失效模式,从而导致构件的极限承载力降低,使荷载位移曲线上升段斜率及下降幅度发生改变。此外,试件受正向偏心荷载时的承载力下降幅度大于受负向偏心荷载时,试件受正向偏心荷载时会出现承载力上下波动的现象。In order to study the stability of cold-formed thin-walled lipped channel columns with openings under eccentric load,a large-scale universal software was used to simulate and analyze the existing tests to verify their reliability,then the influence of the hole and eccentricity on the load-bearing capacity,load-displacement curve and buckling failure mode was analyzed.The results show that the existence of holes and eccentricity changes the buckling failure mode of the members,and then reduces the ultimate bearing capacity of the members,and changes the slope and the descending range of the load-displacement curve.In addition,the load-carrying capacity of the specimen under positive eccentric load decreases more than that under negative eccentric load,and the load-carrying capacity of the specimen will fluctuate.

关 键 词：冷弯薄壁型钢 腹板开孔 偏心受压 屈曲模式 力学性能 

分 类 号：TU392.1[建筑科学—结构工程]