多层冷弯薄壁型钢组合墙体-钢框架混合结构的推覆性能分析  

Pushover Performance Analysis of Multi-storey Cold-formed Thin-walled Steel Composite Wall-steel Frame Hybrid Structure

作　　者：褚云朋[1] 钟燕 伏金蓉 侯鸿杰 CHU Yunpeng;ZHONG Yan;FU Jinrong;HOU Hongjie(College of Civil Engineering and Architecture,Southwest University of Science and Technology Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《西南科技大学学报》2021年第4期38-44,53,共8页Journal of Southwest University of Science and Technology

基　　金：国家自然科学基金项目(51278236);四川省科技厅基础研究项目(2019YJ0322)。

摘　　要：冷弯薄壁型钢组合墙体-钢框架多层混合结构上下层墙体间及墙体与框架间传力均不连续,是抗震的薄弱部位。提出一种层间加强连接部件,以提高墙体与框架的协同工作能力。对层间加强部件进行竖向轴压试验及水平荷载数值模拟分析,得到加强部件的承载能力及性能最优部件,同时建立了4~6层加入层间加强部件的基于墙体简化力学模型的混合结构,并对其进行Pushover分析。结果表明:(1)层间加强部件中的GHJ系列试件的竖向及水平承载力均略高于GHJB系列试件,破坏前有较大的变形,属于延性破坏,且具有较强的耗能能力;(2)多层混合结构Pushover分析表明结构在多遇地震以及7,8度罕遇地震作用下层间位移角均满足限值要求,位移角超过限值时也无倒塌现象,结构进入中等破坏后,在地震持续作用下需经损伤积累才发生倒塌等严重破坏。The force transmission between the upper and lower walls and between the wall and the frame of the cold-formed thin-walled steel composite wall-steel frame multi-storey hybrid structure is not continuous,which becomes the weak part of seismic resistance. A strengthening connection component between layers was proposed to improve the cooperative work ability of composite wall and steel frame. And then,vertical axial compression test and horizontal load numerical simulation analysis were carried out on the interlayer strengthening component to obtain the bearing capacity and select the optimal structural components. Next,a hybrid structure with interlayer strengthening components in 4-6 stories were established,and Pushover analysis was carried out. The results show that:( 1) The vertical and horizontal bearing capacities of the GHJ specimens of the interlayer strengthening components are slightly higher than those of the GHJB specimens. Besides,the GHJ specimens have a strong energy dissipation capacity and a large deformation before failure,which belongs to ductile failure.( 2) Pushover analysis of multi-storey hybrid structure shows that the interlayer displacement angle of the structure meets the limit requirements under frequent earthquakes and rare earthquakes of 7 and 8 degrees,and there is no collapse when the displacement angle exceeds the limit value. After the structure enters medium damage,it will take a long time to accumulate damage before serious damage occurs.

关 键 词：多层墙体-钢框架混合结构 层间加强连接部件 承载性能 PUSHOVER分析 

分 类 号：TU973[建筑科学—结构工程]