预制预应力混凝土拼装框架梁柱节点抗震性能研究

针对采用预应力钢筋进行干式连接的预制预应力混凝土拼装框架梁柱节点进行抗震性能研究。设计制作了一组节点试件，对其进行低周往复加载试验和数值分析，观测节点变形与破坏特征，得到试件梁端力－位移滞回曲线，分析节点承载力、耗能水平与变形能力。结果表明:通过接缝开合可在较小位移下控制构件的损伤程度，破坏模式以柱端牛腿压剪破坏为主；与现浇混凝土梁柱节点相比，该节点具有良好的变形能力和自复位特征，但是节点整体耗能能力较低；采用简化的基于多折线骨架曲线的本构模型可以对节点的力学性能进行简化等效模拟。

Study on seismic behavior of precast prestressed concrete frame beam-column joints

The seismic behavior of the precast prestressed concrete frame beam-column joints were studied. A set of joint specimens were designed and manufactured. The low-cycle reversed loading test and numerical analysis were performed to observe the deformation and failure characteristics of the joints,obtain the force-displacement hysteretic curve of the beam end of the specimen,and analyze the bearing capacity,energy dissipation and deformation capacity of the joints. The results show that the joint opening can control the damage under small displacement,and the failure mode is mainly the compression shear failure of the corbel on the column. Compared with the cast-in-place concrete beam-column joint,the joint has good deformation capacity and self-reset characteristics, but the overall energy consumption capacity of the joint is lower. A simplified model based on polyline skeleton curve can be used to simulate the mechanical properties of joints.