关键词: 桥梁工程；地震工程；道路网络；易损性分析；拓扑结构；信息熵；熵权法

Abstract: The seismic hazard assessment of existing bridges in urban road networks is a complex and critical issue. In response to the shortcomings of existing evaluation methods that often relied on empirical judgment or considered factors affecting risk assessment, a multi-scale evaluation method was proposed. In the first scale, bridges within the road network were grouped by defining special road sections. And then in the second scale, the structure anti-seismic performance and the topological characteristics of the bridge in the road network were obtained by the modified structural vulnerability analysis method and the topological feature extraction method. At last, a CRITIC-entropy weighting method (EWM) combined method was used to comprehensively assign weights and calculate the comprehensive anti-seismic importance of bridges in the road network. The results show that the proposed method can realize the quantification of the decision-making process, and it can be used as a reliable basis for assessing the seismic hazard of bridges in the road network and judging the priority of anti-seismic reinforcement of urban bridges.

Key words: bridge engineering; seismic engineering; road network; vulnerability analysis; topological structure; information entropy; entropy weighting method