在役公路梁式桥综合震害等级预测研究  

Prediction of synthetic seismic damage grade of in-service highway girder bridges

作　　者：樊燕燕[1] 李江龙 李子奇[1] FAN Yanyan;LI Jianglong;LI Ziqi(School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730000, Gansu, China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《地震工程学报》2021年第4期951-957,共7页China Earthquake Engineering Journal

基　　金：长江学者和创新团队发展计划滚动支持(IRT15R29)。

摘　　要：为客观预测在役公路梁式桥综合震害状况,考虑在役桥梁在运营期存在的病害问题,从压力和承压两方面建立在役公路梁式桥综合震害预测评价指标体系。以桥梁作为承灾体,建立在役公路梁式桥综合震害物元可拓模型,运用熵权法进行赋权,确定桥梁的综合震害状况。以一座在役梁式桥为例,运用上述模型确定算例的综合震害状况。研究结果表明,该桥的综合震害等级为Ⅲ级,破坏等级中等,且根据结果分析影响桥梁震害程度的主要影响因素;该模型通过对多个指标关联系数的综合分析来评价在役梁式桥的综合震害等级,极大地提高了该模型评估的准确率及可靠性,为桥梁震害等级的预测提供一定的参考,对提升桥梁综合抗震能力具有积极意义。To objectively predict the synthetic earthquake damage of in-service highway girder bridges,an evaluation index system for synthetic earthquake damage prediction of highway girder bridges was established by considering existing problems of in-service bridges during operation.Taking the bridge as the disaster bearing body,a matter-element extension model for synthetic seismic damage of in-service highway girder bridges was established in this paper.Then the entropy method was used to determine the synthetic seismic damage status of the bridge.Taking an in-service girder bridge as an example,the synthetic seismic damage of the bridge was determined by using the above model.The research results show that the synthetic seismic damage level of the bridge is grade III,and the damage level is medium.According to the results,main factors influencing the seismic damage degree of the bridge were analyzed.The evaluation accuracy and reliability of the model was greatly improved by evaluating the synthetic seismic damage level of the in-service girder bridge through a comprehensive analysis of the correlation coefficient of multiple indexes.The study can provide a certain reference for predicting the seismic damage level of bridges,thus having a positive significance for improving the synthetic seismic capacity of bridges.

关 键 词：梁式桥 综合震害评价 物元可拓理论 熵权法 

分 类 号：U44[建筑科学—桥梁与隧道工程]