灌浆套筒连接装配式混凝土桥墩拟静力试验研究

Quasi-Static Test Study on Assembled Concrete Pier Connected by Grouting Sleeves

摘要: 鉴于装配式桥墩在强震作用下的抗震性能研究仍处于探索阶段，本文以8度设防地区为应用背景，分别设计了整体现浇钢筋混凝土桥墩和采用灌浆套筒连接的装配式混凝土桥墩，通过拟静力试验研究其抗震性能。结果表明：与现浇桥墩相比，采用灌浆套筒连接的装配式桥墩的破坏主要集中于接缝处，整体损伤高度较小。两者在水平承载力、刚度上接近，采用灌浆套筒连接的装配式桥墩在位移延性、残余位移、总的耗能能力上稍强于整体现浇钢筋混凝土桥墩，具备良好的抗震性能，能够在8度地震区应用推广。

Abstract: In view of the fact that the research on seismic performance of assembled piers under strong earthquake is still in the exploratory stage, this paper designs integral cast-in-situ reinforced con-crete pier and assembled concrete pier connected by grouting sleeves respectively, based on the application background of 8-degree fortification area, and studies their seismic performance through quasi-static test. The results show that compared with cast-in-situ piers, the damage of assembled piers connected by grouting sleeves is mainly concentrated at the joint, and the overall damage height is smaller. Both of them are similar in horizontal bearing capacity and stiffness. The assembled piers connected by grouting sleeves are slightly stronger than the whole cast-in-place reinforced concrete piers in displacement ductility, residual displacement and total energy dissipation. They have good seismic performance and can be applied in 8-degree earthquake area.