带可更换摩擦耗能器组合剪力墙抗震性能试验研究  

Experimental study on seismic performance of combined shear wall with replaceable friction dampers

作　　者：汪梦甫[1] 曾雨薇 WANG Mengfu;ZENG Yuwei(College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《地震工程与工程振动》2020年第6期36-46,共11页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51578225,52078203)。

摘　　要：研究了一种带有可更换双钢板长孔螺栓板式摩擦耗能器组合摇摆剪力墙,利用预应力筋提供自复位能力,墙角设置可更换摩擦耗能构件,实现摇摆、自复位、可更换和耗能等4种机制的合理应用。完成了1片2组可更换构件的组合剪力墙的拟静力试验,得到了墙角构件更换前后该剪力墙的破坏模式、滞回曲线、承载力、变形能力、耗能能力和刚度退化等抗震性能指标。试验结果表明:与传统钢筋混凝土带钢板暗支撑现浇剪力墙相比,文中提出的剪力墙损伤显著减小,墙身裂缝较少,卸载后残余变形较小,自复位性能良好;承载力和刚度比传统现浇墙低,但变形能力明显增强,屈服位移、峰值位移以及极限位移均显著增大,表现了良好的变形能力和延性;通过墙角构件的更换使得震后修复更加容易,也节约了修复经济成本。In this paper,a composite rocking shear wall equipped with replaceable plate-type friction dampers with sliding long holes and high strength bolts is proposed.Furthermore,the self-centering ability of the proposed shear wall is provided by unbonded prestressed steel tendons inside the wall,the lateral load is mainly resisted by shear steel dowel,and energy dissipation is mainly dependent on replaceable friction dampers installed at the wall toes and the energy-dissipation steel bars which welded with the concealed steel plate braces and fixed in the foundation.The quasi-static tests of the proposed shear wall with two groups of replaceable friction dampers are completed,the failure modes,the hysteresis curve,the bearing capacities,deformation capacity,the energy dissipation capacity and the stiffness degradation of the proposed shear wall specimens before and after the replacement of wall toes are obtained.The test results show that,compared with the traditional reinforced concrete shear wall with concealed steal plate bracings,the damage of the proposed shear wall is significantly reduced,and the cracks of the wall pier are less;the bearing capacity and the stiffness are lower than that of the traditional wall,and the deformation capability is obviously enhanced;and the yield displacement,peak displacement and ultimate displacement are obviously increased.The replacement of wall toes makes the post-earthquake repair easier,and saves repair cost.

关 键 词：可更换构件 摩擦耗能器 剪力墙 拟静力试验 可恢复功能结构 

分 类 号：TU398.2[建筑科学—结构工程]