预制拼装桥墩连接构造抗震性能分析

Seismic Performance Analysis of Precast Segmental Bridge Piers Connection Configuration

为研究不同位置灌浆套筒连接的预制拼装桥墩的抗震性能,利用有限元软件建立了灌浆套筒分别位于桥墩和基础的两种有限元模型,并与现浇模型做对比,进行拟静力模拟实验.分析比较了两类不同预制构件先混凝土桥墩的损伤部位和破坏形态,并从滞回曲线、耗能性能、抗力衰减、刚度退化、骨架曲线、延性等方面分析了两类构件的抗震性能,结果表明.用灌浆套筒连接的预制桥墩各方面抗震性能与现浇桥墩基本相当,都具有较好的抗震性能.在合理的结构设计下,两种预制桥墩都可以满足抗震要求,实际工程中设计人员可以根据实际情况选择采用.

In order to study the seismic performance of precast segmental bridge piers with different position grouted sleeves,two finite element models of grouting sleeves at piers and foundations were established by the finite element software,and one cast-in-place model was used to conduct pseudo-static tests.The damage locations and failure modes of two types of precast segmental bridge piers were analyzed and compared,and the seismic performance of two types of components was analyzed from hysteretic curve,energy dissipation,resistance attenuation,stiffness degradation,skeleton curve,ductility and so on.The results show that the seismic performance of prefabricated piers connected by grouting sleeves is basically the same as that of cast-in-situ piers in all aspects,and both have good seismic performance.Under the reasonable structural design,the two precast piers can meet the seismic requirements, and designers can choose to adopt them according to actual conditions in actual projects.