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http://dx.doi.org/10.7734/COSEIK.2019.32.5.313

Investigation of Temperature Variation of Bridge Cables under Fire Hazard using Heat Transfer Analysis  

Chung, Chulhun (Department of Civil and Environmental Engineering, Dankook Univ.)
Choi, Hyun Sung (Department of Civil and Environmental Engineering, Dankook Univ.)
Lee, Jungwhee (Department of Civil and Environmental Engineering, Dankook Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.32, no.5, 2019 , pp. 313-322 More about this Journal
Abstract
Recently, there have been frequent occurrences of bridge fires. Fires in cable-supported bridges can damage and brake cables due to high temperatures. In this study, fire scenarios that can occur on cable-supported bridges were set up. In addition, based on the results of vehicle fire tests, a fire intensity model was proposed and cable heat transfer analyses were performed on a target bridge. The analyses results demonstrated that temperature rises were identified on cables with a smaller cross-sectional area. Furthermore, vehicles other than tankers did not exceed the fire resistance criteria. When the tanker fire occurred on a bridge shoulder, the minimum diameter cable exceeded the fire resistance criteria; the height of the cable exceeding the fire resistance criteria was approximately 14 m from the surface. Therefore, the necessity of countermeasures and reinforcements of fire resistance was established. The results of this study confirmed that indirect evaluation of the temperature changes of bridge cables under fire is possible, and it was deemed necessary to further study the heat transfer analysis considering wind effects and the serviceability of the bridge when the cable temperature rises due to fire.
Keywords
cable supported bridge; fire hazard; fire intensity model; heat transfer analysis;
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Times Cited By KSCI : 1  (Citation Analysis)
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