整体式拼缝连接的预制楼板-预制剪力墙节点试验

Mechanical behavior of precast concrete slab-precast shear wall monolithic joint

摘要:

为研究整体式拼缝连接的预制楼板-预制剪力墙节点在预制楼板悬臂端竖向荷载作用下的受力性能，进行了1个边节点试件和2个中节点试件的静力试验.结果表明：3个试件的裂缝分布相同，且均为楼板受弯破坏；3个试件承载能力极限状态前的楼板悬臂端竖向荷载-挠度曲线基本相同，预制楼板固端受弯承载力差别不大，且与规范公式计算值的比值平均为1.29；套筒挤压搭接连接可有效传递预制楼板钢筋拉力；整体式拼缝可保证全装配楼盖的整体性，装配式剪力墙结构采用全装配楼盖时，预制楼板与预制墙之间可采用本文试件的整体式拼缝进行连接.

Abstract:

To study the mechanical behavior of precast concrete slab-precast shear wall monolithic joints under the vertical load applied at the cantilever end of the precast slab, static tests of one exterior joint and two interior joints were carried out. The test results indicate that all three specimens failed in a flexural mode with similar crack patterns. The vertical load-deflection curves of the three specimens are about the same before each specimen reached its ultimate limit state. For the three specimens, the fixed end flexural capacities of their precast slabs have no significant difference, and the average ratio of the measured flexural capacity to the calculated capacity following the formula in the current force design code is 1.29. The lapping pressed sleeve splice can transfer the tensile force of the precast concrete slab rebars effectively. The integrity of the total-precast floor can be ensured by adopting the monolithic seam. The monolithic seam in this paper can be used in the precast shear wall structure with total-precast floor.