CFRP加固前后L形竖缝装配式耗能剪力墙抗震性能研究  

Study on seismic performance of prefabricated energy-dissipating shear walls with L-shaped vertical joint before and after CFRP reinforcement

作　　者：张玉敏 庞豹 李祥 王宇亮 蔡占军 何斌 ZHANG Yumin;PANG Bao;LI Xiang;WANG Yuliang;CAI Zhanjun;HE Bin(College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan 063210,China;Earthquake Engineering Research Center of Hebei Province,Tangshan 063009,China)

机构地区：[1]华北理工大学建筑工程学院,唐山063210 [2]河北省地震工程研究中心,唐山063009

出　　处：《建筑结构》2021年第16期16-20,15,共6页Building Structure

基　　金：国家自然科学基金资助项目(51678237);河北省建设科技研究计划项目(2020-05-02)。

摘　　要：设计2个L形竖缝装配式耗能剪力墙,对其进行低周往复加载试验,并对2个破坏后的试件使用CFRP加固后再进行同样的加载试验,研究加固前后试件的承载力、刚度退化、耗能能力以及延性等性能。结果表明,L形竖缝装配式耗能剪力墙整体工作性能良好,随轴压比的增加试件的承载力增加,延性有所降低,但位移延性系数均大于或接近3,有较好的变形能力;腹板墙和L形翼墙均表现为弯剪破坏;在使用CFRP加固后,试件的延性、刚度及承载力有所下降,但部分墙肢能满足使用要求。加固前后试件均表现出了良好的耗能能力。Two prefabricated energy-dissipation shear wall specimens with L-shaped vertical joints were designed.Low cyclic reciprocating loading test was carried out,and the same loading test was carried out on two damaged specimens strengthened with CFRP.The bearing capacity,stiffness degradation,energy dissipation capacity and ductility of the specimens before and after reinforcement were studied.The results show that the overall working performance of prefabricated energy-dissipation shear wall specimens with L-shaped vertical joints is good,and the bearing capacity of the specimens increases but the ductility decreases with the increase of axial compression ratio,the displacement ductility coefficient is greater than or close to 3,showing good denaturation capacity;the web shear wall and L-shaped wing shear wall show bending and shear failure;the ductility,stiffness and bearing capacity of the specimens are decreased after CFRP reinforcement,but parts of shear walls can meet the service requirements.The specimens before and after reinforcement can show good energy dissipation capacity.

关 键 词：CFRP加固 L形竖缝 接缝 耗能 装配式剪力墙 抗震性能 

分 类 号：TU398.2[建筑科学—结构工程]