中文摘要：

底部开水平缝预应力自复位剪力墙在墙体与基础连接处的两端对称设置水平缝,中间部分保持正常连接,同时在墙体内设置无黏结预应力钢绞线提供自复位能力。本文通过低周反复荷载下底部开水平缝预应力自复位剪力墙的试验,研究了试件的破坏形态、滞回曲线、骨架曲线和耗能能力等力学特征,将底部开水平缝预应力自复位剪力墙与普通剪力墙和传统摇摆墙进行对比,并对其进行数值模拟。研究结果表明,底部开缝预应力剪力墙有较好的自复位能力,且承载力与普通剪力墙相当;相对于传统摇摆墙,耗能能力较好。这种剪力墙能有效减小墙体本身裂缝的发展,一定程度上保护墙体不受破坏。其数值模拟结果能较好吻合试验结果。

英文摘要：

Horizontal slits are placed symmetrically at the wall ends between the wall-foundation interface of prestressed shear walls, and the concrete in the middle of the wall remains connected. Furthermore, unbonded prestressed tendon is introduced inside the wall to provide self-centering ability. Testing of pre-stressed self-centering shear walls with horizontal bottom slit under cyclic loading was conducted to study the mechanic characteristic of these shear walls. Failure pattern, hysteretic curves, skeleton curves and energy dissipating ability were obtained from the test and the contrast was made among the normal shear wall, the traditional rocking shear wall and the selfcentering shear walls with horizontal bottom slit. Furthermore, the numerical simulation was made for the shear wall with bottom slit. The results indicate that the shear walls with bottom slit behave with excellent self-centering ability while remain lateral load capacity as normal shear wall. And the energy dissipating ability of the new type wall is better than traditional rocking shear wall. The number and size of the cracking in the walls were largely reduced and the shear walls were protected from being damaged. And the numerical simulation results fit well with the experimental results.