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剪力墙边缘约束构件设计方法是剪力墙结构设计中未很好解决的问题之一。首先建立了悬臂剪力墙在弹塑性极限状态的侧移模式,以塑性铰转角需求定义不同抗震等级剪力墙的变形能力设计目标,建立了剪力墙塑性铰转角与底部截面曲率、轴压比与相对受压区高度的关系,通过平截面假定计算剪力墙边缘构件约束区长度及配箍特征值需求。通过20个剪力墙试件理论与试验极限位移角的对比分析说明了所介绍方法的可靠性,最后给出了不同抗震等级、不同轴压比剪力墙边缘构件约束区长度及配箍特征值的建议值。
The design method of the edge restraining members of the shear wall is one of the problems not well solved in the design of the shear wall structure. Firstly, the lateral displacement mode of cantilever shear wall in elastic-plastic limit state was established. According to the requirements of plastic hinge angle, the design goals of deformation capacity of shear walls with different seismic levels were defined, and the plastic hinge angle of shear wall and the curvature of bottom section were established. Compared with the height of relative compression zone, the length of restraint zone and the characteristic value of bracing were calculated by the assumption of flat section. The reliability of the proposed method is illustrated by the comparison between the theoretical and experimental displacement angles of 20 shear wall specimens. Finally, the relationship between the length of the restraining zone and the confinement area of the shear members with different seismic levels and different axial compression ratio Recommended values for eigenvalues.