Review and discussion on fire behavior of bridge girders  

作　　者：Gang Zhang Xiaocui Zhao Zelei Lu Chaojie Song Xuyang Li Chenhao Tang 

机构地区：[1]School of Highway,Chang’an University,Xi'an 710064,China

出　　处：《Journal of Traffic and Transportation Engineering(English Edition)》2022年第3期422-446,共25页交通运输工程学报（英文版）

基　　金：support from National Natural Science Foundation of China(Grant No.51878057,52078043);Shaanxi Science Foundation for Distinguished Young Scholars(Grant No.2022JC-23);Fundamental Research Funds for the Central Universities-CHD(Grant No.300102212907,300102210217);Michigan State University;Southeast University。

摘　　要：This paper presents an overview on fire behavior of bridge girders mainly including prestressed concrete(PC) bridge girders and steel bridge girders. The typical fire accidents occurred on bridges are illustrated and, the seriousness of posing threats to bridge structures resulted from increasing traffic fires, specially intense hydrocarbon fires generated from petrol-chemicals, is highlighted. The current researches, embracing high-temperature properties of constituent materials, prestress state, measurement in fire tests, numerical methods, structural fire resistance, and so forth, taken on coping with problems existing in fire behavior and structural fire behavior in bridge girders are reviewed and discussed. Further, strategies for enhancing fire resistance of bridge girders followed with failure criterion and mode in types of bridge structures are provided. Future research area along with emerging trends in structural fire behavior of bridge girders is also recommended for mitigating fire hazards occurred on bridge girders. Herein, it can be attained a conclusion from review and discussion that prestressed concrete bridge girders with thin webs, specially T-shaped bridge girder, are prone to unstable under fire exposure conditions. High-strength concrete utilized in prestressed concrete bridge girders is vulnerable to spalling at elevated temperature. Steel-truss bridge girder present a more significant fragility to fire exposure compared than other steel bridge girders.

关 键 词：Bridge engineering Fire behavior Prestressed concrete bridge girder Steel bridge girder Fire resistance Fire hazard 

分 类 号：U442[建筑科学—桥梁与隧道工程]