装配式钢筋混凝土连续梁桥抗震性能分析

Seismic Performance Analysis of Prefabricated Reinforced Concrete Continuous Beam Bridges

摘要: 基于OpenSees有限元分析软件，建立了整体现浇墩(RC)、套筒连接装配式墩(PCS)和预应力套筒连接装配式墩(PCSS)连续梁桥的数值模型，以墩顶位移、自恢复能力和滞回耗能为指标，对比分析了三种类型桥梁的抗震性能。结果表明：整体装配式连续梁桥的抗震性能优于现浇连续梁桥；PCSS连续梁桥整体抗震性能最好，其残余位移小，具有一定的自复位能力；PCS连续梁桥的整体抗震性能与RC连续梁桥相近；本文中装配式桥墩模拟方法可以应用于桥梁体系的抗震分析研究。

Abstract: Based on finite element analysis software OpenSees, the numerical models of integral cast-in-place pier (RC), the prefabricated concrete pier with grouted sleeves (PCS) and the prefabricated and pre-stressed concrete pier with strands and grouted sleeves (PCSS) continuous girder bridges are estab-lished. Nonlinear time history analysis of three types of bridges is carried out and the displacement of pier top, re-centering capacity and hysteretic energy dissipation are compared. The results show that the displacement response of pier top of continuous girder bridge with prefabricated pier is less than that of cast-in-place pier continuous girder bridge, the residual displacement of PCSS continuous girder bridge is small, and it has better re-centering capacity. The hysteretic energy dissipation of PCS continuous girder bridge is similar to that of RC continuous girder bridge. The simulation method of prefabricated pier in this paper can be applied to the seismic analysis of bridge system.