基于反应谱法的灌浆套筒连接装配式桥墩抗震性能研究

Study on Seismic Performance of Assembled Pier with Grouted Sleeve Connection Based on Response Spectrum Method

公路桥梁需要高度关注桥墩的抗震性能。本文以某高速公路桥梁墩柱为例,研究灌浆套筒连接装配式桥墩的抗震性能。建立了装配式桥梁墩柱的钢筋混凝土结构模型,利用有限元模拟分析了墩柱的自振频率及响应特征,基于反应谱法计算了该装配式桥墩在E1和E2地震作用下的受力与变形特征,对比了装配式墩柱与现浇墩柱的地震响应。计算结果表明,该装配式桥墩具有较好的抗震性能,装配式墩柱与现浇墩柱的抗震性能基本相同。

Highway bridges need to pay close attention to the seismic performance of piers. Taking the pier column of an expressway bridge as an example, this paper studies the seismic performance of the assembled pier connected by grouting sleeve. The reinforced concrete structure model of the fabricated bridge pier is established. The natural vibration frequency and response characteristics of the pier are analyzed by finite element simulation. The stress and deformation characteristics of the fabricated pier under E1 and E2 earthquakes are calculated based on the response spectrum method, and the seismic responses of the fabricated pier and the cast-in-place pier are compared. The calculation results show that the fabricated pier has good seismic performance, and the seismic performance of fabricated pier column is basically the same as that of cast-in-place pier column.