预应力混凝土梁桥火灾后安全性能评估研究

Safety Performance Evaluation of Prestressed Concrete Beam Bridge after Fire

随着我国经济建设的发展,桥梁在服役期间出现的问题逐步增多,部分桥梁遭遇过火灾影响,如何合理评估桥梁火灾后的安全性能成为许多管养机构关心的问题。文章针对江苏省某预应力混凝土梁桥开展火灾后的相关研究,通过对该桥受损影响区域、材质状况与状态、静载试验、自振频率的试验,综合评估其火灾后安全性能,为同类型桥梁火灾后的评估起到一定的指导作用。

With the development of economic construction in China,the problems of bridges in service have gradually increased,and some bridges have been affected by fire.How to reasonably evaluate the safety performance of bridges after fire has become a concern for many custodial institutions.This paper carried out a relevant study on a prestressed concrete beam bridge in Jiangsu Province after fire,and comprehensively evaluated its post-fire safety performance in the damage affected area,material condition and state,static load test and natural vibration frequency test,which played a certain guiding significance for the post-fire assessment of similar bridges.