【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。水平缝减少了墙体角部混凝土中拉应力的产生,并引导墙体裂缝仅在连接处开展;中部正常连接部分通过钢筋与混凝土的共同作用提供一定的抗滑移能力,并通过其中钢筋的屈服耗能;无黏结预应力钢绞线通过在弹性范围内变形为剪力墙提供自复位能力。本文介绍了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设计、试件制作和试验结果。结果表明,底部开水平缝预应力自复位剪力墙试件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。更多还原

【Abstract】 Horizontal slits are placed symmetrically at the wall ends on the wall-foundation interface of pre-stressed shear walls,and the concrete in the middle of the wall remains connected. Furthermore,unbonded pre-stressed tendon is introduced inside the wall to provide self-centering ability. The tension stress at the wall toes is reduced by setting of horizontal slits,and cracking in the wall extends mainly on the wall-foundation interface under the conduction of the pre-slits. Horizontal slide of the wall is prevented because of the combined action of concrete and reinforcements,which are used here to dissipate energy. Self-centering ability is guaranteed by unbonded pre-stressed tendon,which is deformed in the elastic scope. This paper introduces the testing design,specimen construction and results of testing of pre-stressed self-centering shear walls with horizontal bottom slit under cyclic loading. It indicates that the shear walls with bottom slit behave with excellent self-centering ability while remains lateral load capacity as normal shear wall,and the energy dissipating ability is better than the traditional rocking shear wall.更多还原