Q550GJC焊接H形钢柱截面宽厚比限值分析  

ANALYSIS OF WIDTH TO THICKNESS RATIO LIMITATION OF Q550GJC HIGH STRENGTH WELDED H-SECTION STEEL COLUMNS

作　　者：雷轶群 陈水荣[1,2] 

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]中国京冶工程技术有限公司,北京100088

出　　处：《钢结构》2016年第2期18-23,17,共7页Steel Construction

基　　金："十二五"国家科技支撑计划项目(2012BAJ13B01)

摘　　要：为研究屈服强度为550 MPa及以上的钢构件的局部屈曲,考虑到构件局部屈曲与其截面的板件宽厚比有密切联系,借助ANSYS有限元分析软件,对Q550GJC高强度焊接H形钢柱截面板件在地震作用下的宽厚比限值进行分析。通过考虑构件的材料非线性、几何非线性、初始几何缺陷和焊接残余应力等影响,对钢柱进行压弯滞回计算,得到构件的骨架曲线,并从中计算出构件的延性系数。结果表明:得到的Q550GJC焊接H形钢柱截面板件在地震作用下的宽厚比限值符合GB 50011—2010《建筑抗震设计规范》的规定。Local buckling of steel column had close relation with the width to thickness ratio of the section. For the study of local buckling of high strength steel,especially the one with yielding point over 550 MPa,the general-purpose finite element analysis software ANSYS was used to analyze the column performance of H-section steel to study the width to thickness ratio limitation under the situation of earthquake. The influences of material nonlinearity,geometric nonlinearity,initial geometric imperfection and residual stress were considered in the finite element models and these models were used to do the hysteretic analysis. After the hysteretic curve was got,the skeleton curve from it was obtained. Then the ductility factors from the skeleton curve were calculated and finally the conclusions showed that the width to thickness ratio limitation of high strength welded H steel columns allowed to the recent code by analyzing the ductility factors.

关 键 词：高强度钢材 有限元 宽厚比限值 残余应力 滞回曲线 延性系数 

分 类 号：TU391[建筑科学—结构工程]