Evaluation of Evacuation Capacity of High-Speed Railway Bridges Based on Improved SPAAlgorithm

With the rapid development of high-speed railway, high-speed railway bridges play an increasingly important role in the transportation network. However, due to the special structure of high-speed railway bridges, once accidents or emergencies occur, evacuation becomes an important issue. Therefore, it is of great significance to evaluate the evacuation capacity of high-speed railway bridges for ensuring passenger safety. The purpose of this paper is to improve the SPA algorithm and apply it to evaluate the evacuation capacity of high-speed railway bridges. Firstly, we introduce the basic principles and steps of the traditional SPA algorithm, and then point out its limitations. In order to solve these problems, we propose an improved SPA algorithm, which considers the obstacles on the evacuation path and the evacuation time. Finally, we verify the effectiveness and superiority of the improved algorithm through simulation experiments.