Abstract This paper presents an approach for investigating the stability performance of a three-pylons suspension bridge considering the tanker fire nearby middle steel-pylon. The proposed approach comprises of two steps, named as heat-transfer analysis and structural stability analysis. The first step involves the definition and simulation of fire scenarios, and the heat-transfer process from flame to the middle-pylon. The second step involves the stability performance under different fire scenarios, and the parametric study of burning time, fire area and fire location. Results show that the current fire temperature curves without considering height effects would strongly overestimate the influence of tanker fire. The stability coefficient drops significantly after 30 min and strongly dependent on the fire size and the burning location. The approach and the conclusions are of important value in the safety assessment, management, and maintenance of cable-supported bridges with steel pylons.

中文翻译：

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考虑钢塔附近油轮火灾的悬索桥稳定性评估

摘要 本文提出了一种考虑中间钢塔附近油轮火灾的三塔悬索桥稳定性性能研究方法。所提出的方法包括两个步骤，称为传热分析和结构稳定性分析。第一步涉及火灾场景的定义和模拟，以及从火焰到中塔的传热过程。第二步涉及不同火灾场景下的稳定性性能，以及燃烧时间、火灾面积和火灾位置的参数研究。结果表明，当前未考虑高度影响的火灾温度曲线会严重高估油罐车火灾的影响。稳定系数在 30 分钟后显着下降，并且强烈依赖于火势大小和燃烧位置。