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针对斜拉桥拉索火灾事故时有发生的现状,本文将事故树分析法(FTA)应用于斜拉桥拉索火灾事故研究中,分别以斜拉桥运营阶段油罐车着火和施工阶段电焊作业引起斜拉索火灾事故为案例,建立了斜拉桥运营阶段油罐车着火引起斜拉索火灾事故树模型和施工阶段电焊作业导致索塔内多根斜拉索火灾事故树模型。本文对事故树模型进行了定性分析,得出了事故树模型的最小割集、最小径集,以及各个基本事件结构重要度,并提出了斜拉桥拉索火灾事故的相关预防措施。
Aiming at the status quo of cable fire accident occurred in cable-stayed bridge, this paper applies Fault Tree Analysis (FTA) to cable fire accident research of cable-stayed bridge, A case of cable stayed fire accident was established as a case study. A tree model of cable fire accident caused by tanker fire during the operation phase of cable stayed bridge was established. In this paper, the fault tree model was qualitatively analyzed, the minimum cut set, the minimum path set and the importance of each basic event structure of the fault tree model were obtained. The related preventive measures of cable fire accident were put forward.