超高轴压比新型自分缝组合剪力墙抗震性能试验及承载力分析  

Seismic behavior and load bearing capacity of innovative adaptive-slit composite shear walls under ultra-high axial compression ratio

作　　者：管民生[1,2] 李祥 曾庆立 沙蒙 肖茜 杜宏彪[1] Guan Minsheng;Li Xiang;Zeng Qingli;Sha Meng;Xiao Qian;Du Hongbiao(.Cllege of Ciul and Transportation Engineering,Shenzhen University,Shenzhen 518060,China;Key Laboratory of Coastal Urban Resilient Infrastructures(ME),Shenzhen University,Shenzhen 518060,China;Shenzhen Li Peng Structural Engineering Technology Co.Ltd,Shenzhen 518000,China)

机构地区：[1]深圳大学土木与交通工程学院,广东深圳518060 [2]深圳大学滨海城市韧性基础设施教育部重点实验室,广东深圳518060 [3]深圳市力鹏工程结构技术有限公司,广东深圳518000

出　　处：《建筑科学》2022年第9期104-113,共10页Building Science

基　　金：国家自然科学基金重大项目资助(52090082)。

摘　　要：自分缝剪力墙是一种在大震时自动分缝形成若干大剪跨比分体墙的新型剪力墙,可有效改善剪力墙的抗震性能。为研究自分缝组合剪力墙的抗震性能,完成了4片新型自分缝组合剪力墙试验,研究了超高轴压比下自分缝组合剪力墙在低周往复荷载作用下的破坏模式、滞回耗能及截面应变分布规律。试验结果表明:新型自分缝组合剪力墙利用钢管与管外混凝土之间的粘结滑移失效可实现地震作用下的自动分缝,其破坏过程经历了整体墙、带缝整体墙、分缝墙三个阶段。新型自分缝组合剪力墙承载能力高,延性和耗能能力显著提升,有效避免了剪力墙发生脆性剪切破坏,表明其在超高轴压比下具有良好的抗震性能。在试验和理论分析的基础上,提出了自分缝剪力墙压弯承载力计算公式,计算结果与试验结果吻合较好。An adaptive-slit composite shear wall is the innovative shear wall that can automatically be divided into several large shear span walls during large earthquakes, which can effectively improve the seismic behaviors of shear walls. In order to investigate the seismic behaviors of the adaptive-slit composite shear wall, cyclic tests on four shear wall specimens with ultra-high axial compression ratio are carried out to examine the failure mode, hysteretic energy dissipation, and strain distribution along the wall base section. The test results show that the vertical slits can be formed in the innovative composite shear wall under cyclical loading through the bond-slip failure between the steel tube and the outer concrete, and the failure process goes through three stages: integral wall, integral wall with slits, and slit wall. The innovative adaptive-slit composite shear wall has higher bearing capacity, and improved ductility and energy dissipation capacity. Moreover, the brittle shear damage of the shear wall is effectively avoided by the formation of the slits, which indicates the good seismic behavior of the adaptive-slit composite shear wall with ultra-high axial compression ratio. Based on the experimental and theoretical analysis, the calculation formula of the compression-bending bearing capacity of the adaptive-slit shear wall is proposed, and the calculation results are in good agreement with the experimental results.

关 键 词：超高轴压比 自分缝组合剪力墙 拟静力试验 抗震性能 压弯承载力 

分 类 号：TU398.2[建筑科学—结构工程]