Performance-based Rapid Evaluation Method for Post-earthquake Traffic Capacity of Bridge System

As the key node of highway transportation line, bridges are easy to be damaged under earthquake. When bridge earthquake damage occurs, traffic will often be interrupted, resulting in traffic network paralysis in disaster areas, seriously affecting the development of post-earthquake rescue work, thereby further aggravating the loss of personnel and property. In this paper, a performance-based method for evaluating the post-earthquake capacity of bridge system is proposed, and the post-earthquake operational status of the bridge system is evaluated. The results show that the performance-based assessment of bridge capacity after earthquake is of great value in evaluating the operation status of bridge system and making operational management decisions. Based on the fragility analysis of bridge components, the I-PCM method can be used to quickly establish the fragility curve of bridge system; meanwhile, combined with the performance-based evaluation model of seismic damage bridge capacity, the rapid evaluation of bridge capacity after earthquake is completed.