关键词: 桥梁火灾, 韧性理论, 指标体系, 韧性评估模型, 逼近理想解法(TOPSIS)

Abstract: In order to control the risk of bridge fire accidents during operation, a conception of bridge resilience to fire was put forward based on the characteristic of resilience theory. And a model was built for bridge resilience to fire, which was consisted of the fire resistance capacity, absorption capacity, recovery capacity and adaptation capacity. On the basis of considering the the bridge itself, its surrounding environment and related personnel among others, an assessment index system of bridge resilience to fire was established. And the TOPSIS method was applied to the evaluation of bridge resilience to fire. Taizhou Bridge was taken as an example to verify the validity of the model, and the bridge resilience to fire of the five sections of it were evaluted through the proposed method. The five bridge sections were the North line, Main bridge, the Yangzhong line, Jiajiang bridge and the South line respectively. Besides, a comparison was made between the assessment results and the actual situation of the project.The results show that the fire resilience rating of Jiajiang bridge is Class III, the north and south line and Yangzhong line are all Class II, and the main bridge is Class I, that the resilience to fire of Jiajiang bridge is the best among the five sections of Taizhou bridge, followed by the south line, north line and Yangzhong line, while the resilience to fire of the main bridge is the worst, that the evaluation result applying the resilience assessment model based on the TOPSIS method is consistent with the actual condition.

Key words: bridge fire, resilience theory, index system, assessment model of resilience, technique for order preference by similarity to an ideal solution (TOPSIS)