无粘结PC平板-T形柱节点的反复加载试验

Experimental Study of Unbonded PC Flat Slab-T-Shaped Column Connections Under Reversed Loads

在6个无粘结预应力砼(PC)平板-T形柱节点试件的低周反复加载试验基础上,描述了各试件的受力过程和破坏特性,分析对比了T形柱截面参数和不平衡弯矩加载方向对该节点刚度、承载能力退化和耗能能力、变形恢复能力的影响,并对该节点的抗震性能进行了评价.研究结果表明,该节点具有较好的抗震性能,T形柱腹板长度c1 对节点的抗震性能具有决定作用.

Based on the experimental study of six unbonded prestressed concrete flat slab-T-shaped column connections under low-cycle reversed loads, the loading processes and the failure features of the connection specimens were analyzed. The effects of the section parameters of the T-shaped column and the unbalanced moments in different directions on the performance of the connections, such as the stiffness, the degradation of the bearing ability, the energy-consumption ability and the distortion-recovery ability, were also analyzed by comparison. Moreover, the seismic behavior of the connections was also evaluated. The results indicate that the connections are of excellent seismic behavior, and that the web length c_1 of the T-shaped column is decisive to the seismic behavior of the connections.