考虑蜂窝梁腹板屈曲的框架节点滞回性能分析  

Analysis on Hysteric Behavior of Frame Joints Considering the Cellular Beam Web Buckling

作　　者：贾连光[1] 刘勐[1] 史文学[2] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]营口职业技术学院,辽宁营口115000

出　　处：《沈阳建筑大学学报（自然科学版）》2016年第6期961-969,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51578346)

摘　　要：目的找出低周往复荷载作用下蜂窝梁腹板局部屈曲对框架节点滞回性能的影响规律.方法采用理论分析、试验以及有限元相结合的方法,研究不同腹板高厚比的蜂窝梁框架节点的地震破坏机理、骨架曲线、刚度退化、延性以及耗能能力,得出不同腹板高厚比对蜂窝梁框架节点滞回性能的影响规律.结果腹板高厚比对蜂窝梁框架节点的滞回性能影响显著,随着腹板高厚比的增大,蜂窝梁框架节点滞回性能变差;当高厚比达到一定值后,蜂窝梁腹板产生屈曲,框架节点的滞回性能会迅速变差.结论为保证蜂窝梁框架节点具备良好的滞回性能,应严格限制高厚比.This paper is in order to study the frame joints hysteric behavior considering the cellular beam web buckling under the low-cycle repeated load, by the method of combine theoretical analy- sis, experiment and finite element. Through analyzing cellular beam frame joints hysteric behavior with different web depth-thickness ratio, comparing different members seismic failure mechanism, skeleton cures, stiffness degradation, ductility and energy dissipation capacity, the influence law of members with different web depth-thickness ratio web buckling for joints hysteric behavior was ob- tained. The results of research show that the web depth-thickness ratio had large influence on cellu- lar beam frame joints hysteric behavior, with the increase of the web depth-thickness ratio, the hys- teric behavior of cellular beam frame joint will get worse, after the web depth-thickness ratio reac- hing a certain value, the cellular beam web get buckling and the hysteric behavior of frame joints would decrease rapidly. In order to ensure that cellular beam frame joints have good hysteric be- havior, the web thickness ratio should be limited strictly.

关 键 词：框架节点 蜂窝梁腹板高厚比 腹板屈曲 滞回性能 

分 类 号：TU392[建筑科学—结构工程]