ABSTRACT
In evaluating the overall performance of the bridge network, each bridge in the network system plays a different role in different network states. Some bridges will be the key bridge to ensure the smooth connection of any two points in the network. Based on the core principle of web search engine, PageRank algorithm is introduced into the bridge importance ranking calculation of bridge network system, which gives each bridge initial connection value in the system, and uses this algorithm to carry on the finite iteration computation until the connection value of each bridge converges to a certain value output in accordance with the final output of the connection value of all the bridges in the network based on their degree of importance for the initial order. The results of the ranking help people allocate limited resources to the maintenance and repair of key bridges at the top of the ranking, and in the wake of natural disasters, such as earthquakes, provide theoretical basis and support for disaster relief decisions
