无支座连续刚构桥是最近新发展起来的一种新结构,已在广州、长沙、福州等城市的轨道交通结构中得到大量应用,但目前对于无支座连续刚构桥的抗震性能研究较少。论文以典型无支座连续刚构桥为背景,首先应用增量动力分析方法,揭示了无支座连续刚构桥的地震损伤、破坏过程；在此基础上基于地震易损性分析方法,给出了无支座连续刚构桥桥墩典型地震易损性曲线,探讨了无支座连续刚构桥地震损伤破坏风险。

The continuous rigid frame bridge without support is a new type of structure developed recently. It has been widely used in the rail transit structure of Guangzhou, Changsha, Fuzhou and other cities, but there is little research on the seismic performance of continuous rigid frame bridge without support. Based on the typical continuous rigid frame bridge without support, the paper analyzes the failure process and seismic damage risk of continuous rigid frame bridge without support under earthquake. On this basis, based on the seismic vulnerability analysis method, the typical seismic vulnerability curves of piers of continuous rigid frame bridge without support are given, and the seismic damage risk of continuous rigid frame bridge without support is discussed.

U231.1

复杂环境下轨道交通土建基础设施防灾及能力保持技术 （项目五-2017YFB1201200、课题4-2017YFB1201204）；