Fire-induced temperature response of main cables and suspenders in suspension bridges: 1:4-scaled experimental and numerical study

被引：0

作者：

Du, Gaoming ^{[1
]}

Liu, Gao ^{[2
]}

Ni, Ya ^{[3
]}

Xu, Bolong ^{[4
]}

Ge, Shaokun ^{[5
]}

Qi, Jiqiu ^{[4
]}

机构：

[1] Jiangsu Huatong Engn Technol Co Ltd, 9 Ziyun Ave, Nanjing 210014, Jiangsu, Peoples R China

[2] Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China

[3] China Univ Min & Technol, Sch Low Carbon Energy & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China

[4] China Univ Min & Technol, Sch Mat Sci & Phys, Xuzhou 221116, Peoples R China

[5] China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Jiangsu, Peoples R China

来源：

CASE STUDIES IN THERMAL ENGINEERING | 2025年 / 68卷

基金：

中国国家自然科学基金;

关键词：

Bridge fire; Temperature response; Large-scale experiment; Numerical simulations; Fire protection; POOL FIRES; BEHAVIOR;

D O I：

10.1016/j.csite.2025.105878

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

As traffic increases, vehicle fires on suspension bridges present significant threats to structural integrity and traffic safety. This study, centered on a suspension bridge in China, investigates the thermal responses of main cables and suspenders during vehicle fires using 1:4 scale gasoline pool fire experiments and numerical simulations. The study examines the effects of wind speed, pool size, and lane position on flame dynamics and the temperature response of cables. The results demonstrated that higher wind speeds and larger pool sizes enhance the mass burning rate, leading to flame deflection and uneven temperature distribution along the cables. Under a wind speed of 1.56 m/s, the emergency lane fire generated a maximum temperature of approximately 960 degrees C at the base, while the slow lane fire reached 909 degrees C at a height of 1.6 m. These findings highlight the greater thermal threat posed by emergency lane fires. A fire protection zoning strategy is proposed: the 0-12.8 m zone should be protected with a target temperature of 1000 degrees C, and the 12.8-20.8 m zone with a target of 700 degrees C, with a fire resistance duration of 90 min. This research provides a critical reference for the fire protection design of suspension bridge cables.

引用

页数：13

共 38 条

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