附加可更换阻尼器装配式桥墩的抗震性能

为减轻灌浆套筒装配式桥墩的地震损伤，尽快恢复震后桥墩使用功能，在常规灌浆套筒装配式桥墩的基础上，提出一种在桥墩墩底连接处设置可更换阻尼器的改进方案。采用数值模拟方法对常规灌浆套筒装配式桥墩和附加阻尼器灌浆套筒装配式桥墩进行对比分析，研究附加可更换阻尼器装配式桥墩的抗震性能。结果表明，灌浆套筒装配式桥墩安装可更换阻尼器后，水平承载力提高了10%,累积耗能提高了27%,桥墩墩底连接处的损伤减轻，其中最大残余位移减少了19%,桥墩抗震性能提高，对桥梁韧性抗震研究具有一定参考意义。

Seismic performance of prefabricated pier with replaceable damper

In order to reduce the plastic seismic damage of prefabricated pier with grouting sleeve and resume the function of the pier in a timely manner, the concept of the prefabricated pier with grouting sleeve and replaceable damper was proposed. A conventional prefabricated pier with grouting sleeve and a pier with grouting sleeve and replaceable damper were analyzed using numerical modeling method. Two models were established to compare the seismic performance between the conventional pier and the bridge pier with replaceable damper. The result shows that the horizontal bearing capacity and cumulative energy dissipation of the prefabricated pier with replaceable damper are 10% and 27% higher than conventional bridge pier, respectively. The maximum residual displacement of the prefabricated pier with replaceable damper decreases by 19%. The damper can effectively control the structural dynamic responses, reducing the prefabricated pier damage.