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通过对4片配置600 MPa级高强钢筋的混凝土剪力墙进行拟静力试验,分析各试件的破坏特征、滞回曲线、承载力及变形能力、刚度退化、耗能能力等抗震性能指标,研究600 MPa级高强钢筋用于剪力墙边缘约束端柱及墙板时对其抗震性能的影响。研究表明:试件的破坏形态为弯曲破坏;与普通钢筋混凝土剪力墙相比,端柱采用等强度代换配置高强纵筋的混凝土剪力墙的屈服荷载、位移和变形能力均有所提高,墙板配置高强分布筋的混凝土剪力墙的抗弯承载力、各项抗震性能指标也均有提升。在试验基础上提出了考虑高强钢筋的带端柱混凝土剪力墙水平承载力计算式,计算值与试验值吻合较好。
Through four quasi-static tests on four concrete shear walls with 600 MPa high strength steel bars, the seismic performance indexes such as failure characteristics, hysteresis curve, bearing capacity and deformation capacity, stiffness degradation and energy dissipation capacity were analyzed. The effect of 600 MPa high strength steel bar on the seismic behavior of the terminal columns and wall panels restrained by the edge of shear wall was studied. The results show that the failure mode of the specimen is bending failure. Compared with the common reinforced concrete shear wall, the yield load, displacement and deformation capacity of the concrete shear walls with the end reinforcement reinforced by the same strength substitution are increased , Wall configuration of high-strength distribution of tendons of concrete wall bending capacity, the various seismic performance indicators have also been improved. On the basis of the experiment, the calculation formula of the horizontal bearing capacity of the concrete shear wall with terminal columns considering high strength steel is proposed, and the calculated value is in good agreement with the test value.