高强钢筋混凝土T形截面短肢剪力墙抗震性能试验研究

Experiment on seismic behavior of T-shaped short-leg shear wall with high strength reinforced concrete

对6片高强钢筋混凝土T形截面短肢剪力墙进行了低周反复加载试验,各片墙体之间的差别主要是轴压比、剪跨比、配箍率等变量的不同,研究了各试件在荷载作用下的破坏机理、滞回特性、承载力、变形能力、耗能能力等抗震性能指标.研究结果表明:T形截面短肢剪力墙破坏形态主要表现为腹板无翼缘端边缘约束构件受力纵筋压曲、核心混凝土碎裂,因此,有必要大力加强腹板无翼缘端边缘构件的抗震设计;在一定范围内增大轴压比,能明显提升构件的承载力,但延性也随之下降;对比同截面尺寸普通短肢剪力墙,高强钢筋混凝土T形截面短肢剪力墙承载力、耗能能力等抗震性能明显得到提升,峰值承载力普遍提升20%以上.

Experimental studies on 6 high-strength reinforced concrete under low-cycle repeated loading tests were carried out,considering different axial compression ratios,shear span ratios,and stirrup ratios,The seismic performance indicators of each specimen under load,such as failure mechanism,hysteretic characteristics,bearing capacity,deformation capacity,and energy dissipation capacity.Test results show that the failure form is mainly longitudinal rebar buckling of the web without flange side edge restraint members and the core concrete crushing.so,strengthening the seismic design of the flangeless side edge members is necessary.Increasing the axial compression ratio within a certain range can significantly increase the bearing capacity of the specimen,but the ductility is reduced.Compared with the ordinary reinforced concrete short-leg shear wall,the bearing capacity and the energy dissipation capacity of the high strength reinforced concrete,T-section short-leg shear wall is obviously improved.Its peak load capacity is generally increased by more than 20%.