A passive fire protection method for main cables and slings of suspension bridges utilizing fiber felt/aerogel composites

被引：3
|
作者：
Ge, Shaokun [1 ]
Ni, Ya [2 ]
Zhou, Fubao [1 ,3 ]
Yang, Chenyang [1 ]
Guo, Fengqi [1 ]
Li, Jia [3 ]
Shi, Bobo [1 ]
机构：
[1] China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Jiangsu, Peoples R China
[2] China Univ Min & Technol, Sch Low Carbon Energy & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China
[3] China Acad Safety Sci & Technol, Beijing 100012, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 408卷
基金：
中国国家自然科学基金;
关键词：
Fire protection; Suspension bridge fire; Fiber felt/aerogel composite; Thermal insulation; ENHANCED THERMAL INSULATION; AEROGEL; COATINGS; BEHAVIOR; FABRICATION; CONCRETE; THICKNESS; STRENGTH; LAYER;
D O I：
10.1016/j.conbuildmat.2023.133822
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The paper proposes a fire protection method for the main cables and slings (cables for short) of suspension bridges based on fiber felt/aerogel composites. Glass fiber felt/aerogel composite (GFAC), basalt fiber felt/aerogel composite (BFAC), and high silica fiber felt/aerogel composite (HSFAC) were prepared using silica aerogel as filler. Heat-shielding tests and thermal stability analysis were conducted on these three thermal insulation composites. A fire test platform was established to study temperature distribution and fire protection range of suspension bridge cables. The following results were obtained: (1) Within 6000 s, the 5 mm-thick HSFAC can resist 700 degrees C butane fire, while 7 mm-thick HSFAC blocks 1000 degrees C flame. The 10 mm-thick HSFAC provides better thermal insulation. (2) Two fire protection zones are identified according to temperature ranges of 1000 degrees C to 700 degrees C and 700 degrees C to 300 degrees C, respectively, with minimum heights of 12.8 m and 20.8 m. (3) For a 90-minute fire protection, the main cables in the former zone are wrapped with 10 mm-thick HSFAC, while the slings are chosen to be 7 mm-thick HSFAC. In the latter zone, main cables and slings are covered with 5 mm-thick HSFAC. The fire protection method has been implemented on a suspension bridge in Guangzhou, China.
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页数：12
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