开孔冷弯薄壁型钢柱局部-畸变相关屈曲稳定性能研究  

Study on Stability Behavior of Cold-formed Thin-walled Steel Columns with Holes Under Local-distortional Interactive Buckling

作　　者：姚永红[1] 胡治中 YAO Yonghong;HU Zhizhong(Anhui University of Science and 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：《洛阳理工学院学报（自然科学版）》2021年第4期15-19,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金(51508001).

摘　　要：为研究腹板开孔冷弯薄壁型钢柱在局部-畸变相关屈曲作用下的受压稳定性能,采用有限元软件对已有试验结果进行数值模拟,研究了孔洞的存在及相应孔径变化对构件极限承载力及屈曲失效模式的影响。结果表明:孔洞的存在破坏了结构的几何连续性,导致极限承载力降低;孔径的增大会使屈曲失效模式发生改变,部分构件还出现了孔径增大而承载力略有上升的现象。In order to study the compression stability behavior of cold-formed thin-walled steel columns with web openings under local-distortional interactive buckling,the finite element software is used to simulate the existing test results to verify the reliability of the model.And the influence of the holes and their hole diameters on the ultimate bearing capacity and buckling failure mode are studied.The results show that the holes destroy the geometric continuity of the structures and reduce the ultimate bearing capacity.And the buckling failure mode changes with the increase of the hole radius,and some components have the characteristic of the hole radius increased and the ultimate bearing capacity improved.

关 键 词：冷弯薄壁型钢 孔洞 力学性能 相关屈曲 

分 类 号：TU392.1[建筑科学—结构工程]