Damaged plate detection and identification & reinforcement and maintenance research of a subway train carbarn after fire

• 1、Gansu civil engineering science research institute co. LTD
• 2、Gansu Province Engineering Design Institute Co. Ltd
• 3、China Railway First Survey and Design Institute Group Co.Ltd

Abstract：In this paper, a subway train carbarn damaged plate after fire as an example,through the analysis of microstructure, physical and mechanical performance, the scene in situ methods of load test, damaged plate detection and identification after fire are studied.The contents and methods of detection and identification of damaged plate after fire are studied, which provides technical basis for damage evaluation,maintenance and reinforcement of structures after disasters. In this paper, the hierarchical classification and rating standard of damaged structure evaluation after fire are put forward, and the problem of damage degree of concrete structure after fire is solved. According to the test and identification results, the damage grade of the damaged structural members of the fire is evaluated, and the reinforcement and maintenance design of the structural members with different degrees of damage are carried out respectively. Through reinforcement and maintenance, the hidden danger of the structure after the fire is eliminated and the bearing capacity and durability of the structure are improved.

Keywords： damaged plate；analysis of microstructure；load test；detection and appraisal； reinforcement and maintenance