装配式预应力混凝土梁与高强钢筋约束混凝土柱连接节点抗震性能试验研究

摘要

Here,a new type of fully fabricated prestressed concrete beam and high-strength reinforced concrete column joints with end plate bolting was presented.Tests for selected beam-column joints under cyclic loading were performed.Six prefabricated prestressed fabricated intermediate connection specimens and a cast-in-situ connection specimen were tested comparatively.Performances of the tested specimens were evaluated in terms of failure mode,load-displacement hysteresis curves,skeleton curve,ductility factor,stiffness degradation,and energy dissipation capacity, etc.The results showed that the tested specimens exhibit a strong column-weak beam failure mechanism;the load-displacement hysteresis curves of the prefabricated prestressed fabricated intermediate joints under low cyclic loading are plump,the specimens'ductility, energy dissipation capacity and aseismic performance are better, their stiffness degradation rules are similar to each other.The results provided a theoretical basis and a technical support for extending the application of prestressed reinforced concrete frame structures in seismic zones.%提出了一种新型全装配式预应力混凝土梁与高强钢筋约束混凝土柱端板螺栓连接节点形式，在低周反复水平荷载作用下，进行了6个装配式预应力中间节点试件和1个现浇节点试件的对比试验，得到了试件的破坏形态、滞回曲线、骨架曲线、延性系数、刚度退化以及耗能能力等抗震指标，确定了该新型装配式梁－柱连接节点的抗震性能。试验结果表明，新型全装配式预应力混凝土梁与高强钢筋约束混凝土柱端板螺栓连接节点试件均实现了“强柱弱梁”的设计目标。试件的滞回曲线饱满，抗震性能良好，研究成果可为预制装配式框架在地震区的推广应用提供理论依据和技术支持。