Research Progress on Post-Earthquake Functional Recovery of Railway Bridges

The construction of “resilient cities” has attracted much attention in the field of disaster prevention and mitigation in China, and is an important direction for future development. Based on the concept of seismic resilience and the quantitative evaluation elements of resilience, this study systematically sorted out and summarized the research results of domestic and foreign research on the post-earthquake functional recovery of railroad bridges. By comprehensively comparing the application of various methods such as the Monte Carlo method, fuzzy set theory, and expert opinion in evaluating post-earthquake functional recovery, the study analyzes in depth the limitations of the existing research and emphasizes the urgency of establishing a mechanism for post-earthquake functional evaluation. The study points out that future research should take into account the uncertainty of earthquakes, combine the characteristics of rail-bridge systems in terms of dynamic response and repair strategies, quantify the post-earthquake functional recovery process accurately, and take into account the degree of structural recovery and the interactions between the systems more accurately, to provide more reference for the evaluation of post-earthquake functional recovery.