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根据剪力墙截面的特点,提出采用分段约束箍筋改善高性能混凝土剪力墙截面的延性,针对剪力墙截面的受力特点和配筋形式,研究了分段约束箍筋对高性能混凝土剪力墙截面延性的影响;提出剪力墙截面屈服曲率和极限曲率的简化计算公式,分析了剪力墙截面相对受压区高度与曲率延性之间的关系,推导了剪力墙截面曲率延性与约束箍筋数量之间的关系。试验结果和算例分析表明:约束箍筋的作用对高性能混凝土剪力墙截面屈服曲率的影响较小,但对极限曲率的影响较大;剪力墙截面的曲率延性与轴压比、分段约束箍筋的数量、约束范围、截面端部约束混凝土的设计参数等因素有关。
According to the characteristics of the shear wall section, the sectionally restrained stirrups are proposed to improve the ductility of the section of the high performance concrete shear wall. According to the mechanical characteristics and reinforcement forms of the shear wall section, The simplified formulas for calculating the yield curvatures and the ultimate curvatures of the shear wall are proposed. The relationship between the relative compression zone height and the curvature ductility of the shear wall is analyzed, and the curvature of the shear wall section is deduced Relationship between ductility and number of restraining stirrups. Experimental results and case studies show that the effect of confinement stirrup on the yield curvature of high performance concrete shear walls is small but the influence on the ultimate curvature is large. The curvature ductility and axial compression ratio The number of confinement stirrups, the scope of confinement, and the design parameters of confined concrete at the ends of the section.