Experimental and numerical study on failure mechanism of steel-concrete composite bridge girders under fuel fire exposure

Song, Chaojie; Zhang, Gang; Li, Xuyang; Kodur, Venkatesh

doi:10.1016/j.engstruct.2021.113230

Cited by 25 publications

(3 citation statements)

References 28 publications

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“…Song et al evaluated the failure mechanisms of steel-concrete composite bridge girders under fire. They observed that all tested girders suffered severe deflection leading to failure, especially in open-section designs [22]. These findings point to the need for detailed assessments of bridge components under fire conditions, while including the influences of environmental conditions and structural geometry.…”

Section: Introductionmentioning

confidence: 85%

“…This gap points out the critical need for continued research and development. Consequently, bridge fire remains a challenging subject for structural fire engineers, prompting several studies to investigate the fire behavior of bridges through experimental research [21][22][23][24][25]. Among these, Vimonsatit et al analyzed the shear capacity degradation in steel girders under controlled high temperatures and suggested that traditional steady-state fire conditions employed in tests might not encompass the complexities of actual fire scenarios [26].…”

Section: Introductionmentioning

confidence: 99%

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A Simulation-Based Investigation on Thermal Responses of Suspension Bridge Tower Under Different Fire Scenarios

Mostofi,

Altunişik,

Akbulut

et al. 2024

Arab J Sci Eng

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Records of bridge fire incidents illustrate that bridge fires can have catastrophic consequences. The severity of these fires can be influenced by various factors such as bridge type, vehicle size, and wind. Contrary to building fires that have been extensively studied, scant attention has been paid to bridge fires and more specifically fire exposure to the suspension bridges. In addition, existing bridge fire literature is mostly concentrated on fire exposure to girders or cables of suspension bridges. Therefore, this study focused on the post-fire condition of a fire-exposed suspension bridge tower using computational fluid dynamics (CFD) modeling techniques and finite element analysis (FEA). The impacts of the main bridge fire parameters including vehicle size, exposure duration, distance between the fire source and tower, and wind effects were also evaluated. Initially, fire dynamic simulator (FDS) was used to simulate 12 different fire scenarios. The time–temperature histories obtained from each scenario were transferred to the ABAQUS finite element (FE) software to conduct transient thermal analysis and obtain the temperature development within the steel tower of the bridge. The post-fire evaluation was performed with respect to the temperature-induced reduction in the yield strength of steel. The results show that fire exposure from a fuel truck in the proximity of a steel tower could significantly reduce the strength of the tower and lead to severe damage. Early control of the fuel truck fire is crucial in reducing the severity of the damage and preventing temperature development in higher areas of the tower. Although a wind toward the tower can significantly increase the fire-induced damage to the bottom parts of the tower, it considerably reduces the temperature exposure to the higher parts of the tower. Fire exposure from a normal vehicle does not put the tower at risk of failure, and an unprotected steel tower can withstand it. However, a bus fire may lead to minor damage. The thermal strengthening of the first 20 m of the tower can help in preventing the potential fire damage.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

A Simulation-Based Investigation on Thermal Responses of Suspension Bridge Tower Under Different Fire Scenarios

Mostofi,

Altunişik,

Akbulut

et al. 2024

Arab J Sci Eng

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“…Currently, the existing research both domestically and internationally primarily focuses on the temperature field and temperature effects of concrete bridges and steelconcrete composite bridges [7][8][9][10][11][12]. However, there is insufficient investigation into the temperature field of double-layer steel trusses.…”

Section: Introductionmentioning

confidence: 99%

Temperature Response of Double-Layer Steel Truss Bridge Girders

Wang,

Zhang,

et al. 2023

Buildings

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Double-layer steel truss continuous girders are prone to significant temperature stress, deviation, torsion, and warping, thus causing adverse temperature structural responses, and also affecting the safety and durability of bridge structures. This paper presents an investigation on time-dependent characteristics in the temperature field and temperature response of double-layer steel truss continuous bridge girders, fully considering the shielding effect subjected to different solar radiation angles during the high-temperature season. The time-dependent thermal boundary conditions and support conditions provided for the steel truss bridge structure were determined. Subsequently, a thermal analysis model for the entire structure of double-layer steel truss continuous girders was established to attain the temperature distribution law. The research results show that significant differences occur in the position and temperature difference of temperature gradients exhibited in the vertical, horizontal, and longitudinal directions in the double-layer steel truss bridge structure. The temperature distribution pattern within the chord section is mainly influenced by the environmental temperature and solar radiation intensity, along with the heat exchange between different panels. Thereafter, a validated temperature gradient formula for the component section has been proposed. The time-dependent laws in structural displacement, stress, and rotation angle under daily temperature cycling conditions have been revealed, thereby providing a theoretical basis for the life cycle construction and safety maintenance of double-layer steel truss structure bridges.

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Study on the shear behaviour of steel–concrete composite beams after elevated temperature and water cooling

Liu,

Wu,

Zheng

et al. 2024

Archiv.Civ.Mech.Eng

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Experimental and numerical study on failure mechanism of steel-concrete composite bridge girders under fuel fire exposure

Cited by 25 publications

References 28 publications

A Simulation-Based Investigation on Thermal Responses of Suspension Bridge Tower Under Different Fire Scenarios

A Simulation-Based Investigation on Thermal Responses of Suspension Bridge Tower Under Different Fire Scenarios

Temperature Response of Double-Layer Steel Truss Bridge Girders

Study on the shear behaviour of steel–concrete composite beams after elevated temperature and water cooling

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