关键词: 系杆拱桥;桥梁火灾;火灾温度场;有限元

Abstract: In order to test the fire structure of one bridge on 1-64 m arc bridge for studying the damage degree of the arc bridge after the fire and its changes of the performance . Thus we got various performance changes of the arc bridge and did some sampling test after the fire . Analysis of the temperature field , concrete damage , microstructure of concrete after fire .In order to establish finite element model of the bridge , the result showed that the changes of the performance in arc bridge after the fire keeps consistent with the measured results .Our work provides a reliable detection scheme and the basis for bridge fire detection and shows a feasible method of finite element simulation for identification of bridge after fire damage .

Key words: arc bridge;bridge fire;concrete;finite element