新型带竖向缝隙的矩形钢管排柱剪力墙及其抗侧性能  

A NOVEL STEEL-TUBE SHEAR WALL WITH SLITS AND ITS LATERAL-LOAD-RESISTANT BEHAVIOR

作　　者：张倩婧 张磊[1] 童根树[1] ZHANG Qian-jing;ZHANG Lei;TONG Gen-shu(Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学土木工程系

出　　处：《工程力学》2019年第12期153-164,共12页Engineering Mechanics

基　　金：中央高校基本科研业务费项目(2017FZA4020)

摘　　要：针对传统薄钢板剪力墙以及带竖缝钢板剪力墙存在的问题,提出了一种新型带竖向缝隙的矩形钢管排柱剪力墙。基于机构控制法,设计了新型剪力墙的典型算例,并进行了弹性屈曲、弹塑性抗侧和滞回性能分析。结果表明:新型剪力墙的一阶弹性屈曲均为钢管壁的局部屈曲,且临界荷载远大于弹塑性极限承载力;新型剪力墙具有优异的弹塑性抗侧性能,延性系数可达20以上;弹塑性滞回性能曲线饱满,耗能能力佳。在此基础上,提出了新型剪力墙的弹性抗侧刚度、屈服荷载和极限抗侧承载力等关键性能参数的计算方法,同时对截面宽厚比、连接焊缝的高度等构造措施提出了要求。To overcome the deficiencies of traditional thin plate steel shear walls and steel-plate shear walls with slits,the present study proposed a steel-tube shear wall with slits(SSWS),a novel wall that is composed of a row of rectangular steel tubes with slits in between.The study first introduced the mechanisms of a SSWS in lateral load resistant behavior,based on which typical SSWS specimens for numerical analysis were designed.Subsequently,finite element analyses were performed on these typical specimens subject to lateral loads.The results show that the elastic buckling of a SSWS was always controlled by the local buckling of the steel tube section.The nonlinear analyses concerning both the geometric and material nonlinearities indicate that a SSWS is very ductile at the inelastic stage with the ductility coefficient being greater than 20 for some of these specimens.Good energy dissipation of the SSWS was also found in the cyclic loading analysis.Based on these analyses,simple solutions to the elastic stiffness,the yield load and the ultimate load for a SSWS in shear were proposed.The requirements for the section of steel tubes and connections between adjacent steel tubes to ensure good shear performance of a SSWS were also discussed.

关 键 词：钢板剪力墙 钢管排柱剪力墙 竖缝剪力墙 抗侧性能 延性 

分 类 号：TU391[建筑科学—结构工程]