Behavior of steel bridge girders under fire conditions

Aziz, Esam M.; Kodur, Venkatesh; Glassman, Jonathan D.; Garlock, María Eugenia Moreyra

doi:10.1016/j.jcsr.2014.12.001

Cited by 95 publications

(61 citation statements)

References 17 publications

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“…This study complements previous works (see e.g. Wright et al [6], Payá-Zaforteza and Garlock [21], Aziz et al [24], Quiel et al [25],Gong and Agrawal [26]) and paves the way for easier identification of critical bridges with respect to fire risks, as well as for the wider application of numerical models to improve bridge fire response and bridge resilience.…”

Section: Introductionsupporting

confidence: 84%

“…Previous studies on the fire response of steel I-girder bridges [21,22,24] have analyzed a single girder, but not the full bridge. The goal of this simplification was to make FE models simpler and calculation times shorter, so that the FE models would be easier to build and more analyses could be done with less computational effort.…”

Section: Elements Included In the Fe Modelmentioning

confidence: 99%

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Analysis of the influence of geometric, modeling and environmental parameters on the fire response of steel bridges subjected to realistic fire scenarios

Peris-Sayol

Payá-Zaforteza

Alós-Moya

et al. 2015

Computers & Structures

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of the influence of geometric, modeling and environmental parameters on the fire response of steel bridges subjected to realistic fire scenarios. Computers and Structures 2015,158:333-345. DOI: 10.1016/j.compstruc.2015 Analysis of the influence of geometric, modeling and environmental parameters on the fire response of steel bridges subjected to realistic fire scenarios AbstractThis paper studies bridge fires by using numerical models to analyze the response of a typical girder bridge to tanker truck fires. It explains the influence of fire position, bridge configuration (vertical clearance, number of spans) and wind speed on the bridge response. Results show that the most damage is caused by tanker fires close to the abutments in single span bridges with minimum vertical clearance and under windless conditions. The paper provides new insights into modeling techniques and proves that bridge response can be predicted by FE models of the most exposed girder, which saves significant modeling and analysis times.

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Section: Introductionsupporting

confidence: 84%

Section: Elements Included In the Fe Modelmentioning

confidence: 99%

Analysis of the influence of geometric, modeling and environmental parameters on the fire response of steel bridges subjected to realistic fire scenarios

Peris-Sayol

Payá-Zaforteza

Alós-Moya

et al. 2015

Computers & Structures

View full text Add to dashboard Cite

show abstract

“…The developed numerical model was validated against data from fire resistance tests on typical steel bridge girders (named as SG2 and SG3) carried out at Michigan State University [8]. Steel girders SG2 and SG3 are plate girders with web slenderness (D/tw) of 123.…”

Section: Model Validationmentioning

confidence: 99%

“…Therefore, the fire safety information that is specially established for structural members in buildings might not be applied directly for bridge structural members. There is only limited research that has been carried out on fire resistance of structural members of bridges [5][6][7][8][9][10][11][12]. Most of these studies focused on assessing fire response of steel bridge, while very few of these studies aimed to enhance the fire resistance of steel bridge girders [2,12].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Fire Resistance of Steel Bridge Girders Using External Fire Insulation

Aziz

2017

KJAR

Self Cite

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Fire in steel bridges can be a significant hazard; however, no provisions are specified for fire resistance of bridge structural members in current codes and standards. This paper presents results from numerical analysis on the response of steel bridge girders under fire conditions. A finite element model is developed to evaluate the fire resistance of typical steel girders in bridges using fire insulation with different configurations and thicknesses. The first configuration comprised of applying fire insulation on the web plate of the steel girder, while in the second configuration, the steel section is insulated. Results from numerical analysis indicate that fire resistance and failure mode in steel bridge girders is highly influenced by the insulation configuration and thickness. Applying 25.4mm fire insulation on web plate of steel bridge can increase the fire resistance up to 53 minutes, while applying same insulation thickness on steel section can result in 110 minutes fire resistance.

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“…The research showed that fire resistance performance of steel-concrete composite beam bridge was much better than the steel bridge. Transient temperature field and the failure mode of the steel-concrete composite bridges under fire were studied by means of finite element method and verified by experiments [3]. Mechanical behavior of simply supported beam bridge under fire was analyzed by ANSYS [4].…”

Section: Introductionmentioning

confidence: 99%

Buckling Instability Behavior of Steel Bridge under Fire Hazard

Wang

Liu²

2016

Mathematical Problems in Engineering

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Failure of buckling instability will most likely occur before the displacement reaches the allowable value of the code when a tanker burns under the steel bridge. This research focuses on critical buckling stress of bridge under fire hazard and a thermal analysis model of a steel bridge is established by FDS (Fire Dynamics Simulator). Thermal parameters of the steel are determined by the polynomial fitting method. Temperature field and elastic modulus of the bridge changing with time are calculated by determining the heat release rate function of tanker. Critical buckling stress of the bridge web and bottom floor changing with time is calculated according to steel floor buckling theory. Finite element software ANSYS is used to verify the result. Results show that when a tanker is burning for 17 minutes, critical buckling stress of steel web will be reduced to crl, ( ) = 19.1 MPa and crl, ( ) = 38.8 MPa, which is less than the web stress ( = 19.6 MPa, = 39.8 MPa) caused by dead and live load. So steel web will be the first to show shear flexural bending buckling failure. Displacement in the midspan will reach 35.4 mm at this time, which was less than the allowable displacement (50 mm) set by standard. The best rescue time of the bridge under fire hazard is within 15 minutes.

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Behavior of steel bridge girders under fire conditions

Cited by 95 publications

References 17 publications

Analysis of the influence of geometric, modeling and environmental parameters on the fire response of steel bridges subjected to realistic fire scenarios

Analysis of the influence of geometric, modeling and environmental parameters on the fire response of steel bridges subjected to realistic fire scenarios

Enhancing Fire Resistance of Steel Bridge Girders Using External Fire Insulation

Buckling Instability Behavior of Steel Bridge under Fire Hazard

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