关键词: 自复位剪力墙, 后张拉预应力, 截面设计方法, 底部开缝, 静力弹塑性分析

Abstract: The research aims to study the seismic performance of shear wall with different slotted lengths. Stress analysis of cross sections of shear wall were carried out to quantify the theoretical bearing capacity of the wall under different slotted lengths, and based on the performance goals in fourth level and under third level, cross section of self-reset wall was designed and compared with existing experimental results as well as static elastoplastic results of self-resetting shear wall with variable slit lengths for validation. The results show that the theoretical expression of the bearing capacity agrees with existing experimental and finite element results. Moreover, with an increase in crack length, the self-repositioning ability of the wall increases, and the energy dissipation capacity decreases. A slit length coefficient of 0.2–0.3 adheres to the limit of residual displacement angle and maintains a satisfactory energy dissipation capacity.

Key words: self-reset shear wall, post-tensioning prestress, section design method, slot at the bottom, static elastoplastic analysis