Seismic tests of precast beam-to-column joint subassemblages with unbonded tendons
Seismic tests of precast beam-to-column joint subassemblages with unbonded tendons
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DOI：
10.15554/pcij.01011996.64.81
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发表时间：
1996-01-01
期刊：
影响因子：
1.1
通讯作者：
MacRae, GA
中科院分区：
文献类型：
--
作者：
Priestley, MJN;MacRae, GA
两个未灌浆后张，预制混凝土梁-柱节点子组件进行了测试，根据非弹性位移的循环逆转，以确定地震反应。一个子组合代表单向预应力混凝土框架的外部节点，而另一个子组合代表单向预应力混凝土框架的内部节点。与等效整体节点相比，大型试验单元的设计大大减少了梁和节点的抗剪配筋，但在梁塑性铰区域有特殊的螺旋约束。这两个子组合表现良好，只有轻微的，化妆品损坏被记录高达百分之三或更高的漂移率。滞回响应的能量吸收虽然很小，但大于预期，残余位移可以忽略不计。如果得出的结论是，满意的抗震性能，可以预期从精心设计的无灌浆预制，后张混凝土框架。
Two ungrouted post-tensioned, precast concrete beam-to-column joint subassemblages were tested under cyclic reversals of inelastic displacement to determine seismic response. One subassemblage represented an exterior joint while the other was an interior joint of a one-way prestressed concrete frame. The large scale test units were designed with greatly reduced beam and joint shear reinforcement compared with equivalent monolithic joints, but with special spiral confinement of the beam plastic hinge regions. Both subassemblages performed well, with only minor, cosmetic damage being recorded up to drift ratios of 3 percent or more. Energy absorption of the hysteretic response, though small, was larger than expected and residual displacements were negligible. If is concluded that satisfactory seismic performance can be expected from well-designed ungrouted precast, post-tensioned concrete frames.