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PLASTIC HINGE ROTATION-BASED DESIGN METHOD OF SHEAR WALL'S BOUNDARY ELEMENTS
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摘要: 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。Abstract: The design method of shear wall's boundary elements is one of the problems that have not been solved perfectly.The lateral displacement mode of cantilever shear wall in limit state is set up,and the plastic hinge rotation is used to define the fortification objective of each seismic grade.The relationship between plastic hinge rotation and cross section's curvature,axial compression ratio and relative height of compression zone are deduced.The length of confined zone can be determined by plane-section assumption theory,and the transverse reinforcement characteristic value is determined by the stress-strain relationship of confined concrete.The comparison of 20 shear wall specimens' calculation results and test results illustrates that this design procedure is feasible.The length of confined zones and the transverse reinforcement characteristic values of boundary element in different seismic grades and axial compression ratios are proposed.
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