柱翼缘宽厚比对钢框架倒塌储备能力的影响  

INFLUENCE OF THE COLUMN FLANGE WIDTH-THICKNESS RATIO ON SEISMIC COLLAPSE MARGIN OF STEEL FRAMES

作　　者：朱磊[1] 何若全[1] 冯进[1] 

机构地区：[1]苏州科技学院土木工程学院,江苏苏州215011

出　　处：《钢结构》2013年第8期10-14,共5页Steel Construction

基　　金：国家自然科学基金资助项目(51178285)

摘　　要：运用ABAQUS软件的曲壳单元对考虑柱翼缘屈曲的单层钢框架结构进行增量动力分析,分析了柱翼缘宽厚比对钢框架结构抗倒塌储备能力的影响。结果表明:柱翼缘宽厚比不大于12时结构抗倒塌储备能力较好,大于12时结构抗倒塌储备能力较差;不出现塑性铰范围内的翼缘宽厚比可适当放宽。分析结果可供工程设计参考。ABAQUS shell element was used to do the incremental dynamic analysis of the single-story steel frames which consider the local buckling of the column flange. The influence of column flange width-thickness ratio on the seismic collapse margin was studied. The results show that while the column flange width-thickness ratio less than 12 the seismic collapse margin is good; and the seismic collapse margin is poor when it is greater than 12. Also they show that the flange width-thickness ratio of the non-plastic hinge range of the column can be increased properly. The results can be used for engineering design reference.

关 键 词：单层钢框架 翼缘宽厚比 局部屈曲 抗倒塌储备 

分 类 号：TU391[建筑科学—结构工程]