高强钢筋混凝土短肢剪力墙抗震性能试验研究  

Experimental study on seismic performance of high-strength reinforced concrete short-limb shear wall

作　　者：何尧琼 张品乐[1] HE Yaoqiong;ZHANG Pinle(Institute of Civil Engineering, Kunming University of Science and Technology, Kunming 650500, China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《世界地震工程》2021年第1期26-33,共8页World Earthquake Engineering

基　　金：国家自然科学基金项目(51568028)。

摘　　要：通过对采用高强钢筋的6片T形混凝土短肢剪力墙和采用高强钢筋高强混凝土的6片L形短肢剪力墙进行低周往复加载试验,研究了T形和L形的破坏形态与性能差异,分析了高厚比、轴压比、配箍间距等参数对构件破坏形态、滞回耗能、骨架曲线、延性及耗能等抗震性能的影响,对比分析了构件与普通短肢剪力墙的抗震性能差异。试验结果表明:采用腹板端部箍筋加密的方式可减轻构件端部的损伤和降低正负向加载时承载力和延性的不对称性;T形构件中高厚比为5的试件表现为弯曲破坏,其他构件表现为弯剪破坏;试验中高厚比小的构件相对于高厚比大的试件延性耗能更好,轴压比增大,构件承载力提高但延性降低;与普通短肢剪力墙相比,T形短肢剪力墙承载力和变形能力提高,耗能增加,L形短肢剪力墙承载力提高较大,极限位移增大,构件后期变形能力略有降低,但可以满足抗震性能要求。The low-cycle reciprocating loading test is carried out on 6 T-shaped concrete short-limb shear walls using high-strength steel and 6 L-shaped short-limb shear walls using high-strength steel and high-strength concrete.the failure form and performance differences of the specimens is studied,and The influences of high thickness ratio,axial compression ratio,stirrup spacing and other parameters on the seismic performance of failure pattern,hysteretic energy dissipation,skeleton curve,ductility as well as energy dissipation are analyzed.The differences of seismic performance between the specimens and ordinary short-limb shear walls are analyzed.The test results show that the reinforcement of stirrups at the end of the web can reduce the damage at the end of the specimens,and reduce the asymmetry of the bearing capacity and ductility during positive and negative loading.The specimen with a height-to-thickness ratio of 5 in the T-shaped short-limb shear wall exhibits bending failure,and the other specimens exhibit bending shear failure.The specimens with small height-to-thickness ratios have better ductility and energy dissipation capability than those with large height-to-thickness ratios.Increasing the axial compression ratio of the specimen,the bearing capacity of the specimens increases but the ductility decreases.Compared with ordinary short-limb shear walls,the bearing capacity and energy consumption of T-shaped short-limb shear walls are improved,and the deformation capacity of the specimens is improved.The bearing capacity and ultimate displacement of L-shaped short shear walls are higher than those of ordinary short-limb shear walls.The deformation capacity of the specimens is slightly reduced when the deformation is large,but it can still meet the seismic performance requirements.

关 键 词：短肢剪力墙 抗震性能 高强钢筋 高强混凝土 轴压比 配箍间距 

分 类 号：TU375[建筑科学—结构工程]