基于模糊层次分析法的既有公路桥梁抗震性能评估

Seismic performance evaluation of existing highway bridges based on fuzzy analytic hierarchy process

鉴于目前我国公路桥梁抗震性能评估尚无规范和标准可循的现状,本文结合《公路桥梁抗震设计规范》(JTG/T 2231-01—2020)和历次地震震害调查资料等,对众多影响桥梁抗震性能评估的指标利用模糊层次分析法进行权重计算。提出了适用于公路桥梁抗震性能评估的分层综合评估方法,该方法通过定量的抗震性能一级评估筛选出抗震能力不足的桥梁,为抗震性能二级评估桥梁的选取和评估顺序提供依据,进而指导桥梁结构的抗震加固。该方法较传统的评估方法考虑的因素更加全面、概念清晰且操作简便,研究结果可为将来制定抗震性能评估标准提供参考。同时,通过工程实例验证了该方法具有一定的准确性和适用性。

In view of the current situation that there are no codes and standards to follow for the seismic performance evaluation of highway bridges in my country, this article combines the “Code for Seismic Design of Highway Bridges”(JTG/T 2231-01—2020) and previous earthquake damage investigation data, etc., to affect many bridges The seismic performance evaluation index uses fuzzy analytic hierarchy process to calculate the weight. A hierarchical comprehensive evaluation method suitable for the evaluation of the seismic performance of highway bridges is proposed. This method selects bridges with insufficient seismic capacity through quantitative first-level evaluation of seismic performance, and then conducts detailed second-level evaluation of seismic performance to guide the seismic performance of bridge structures. Reinforcement. Compared with the traditional evaluation method, this method considers more comprehensive factors, clear concept and simple operation. The research results can provide reference for the development of seismic performance evaluation standards in the future.