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

Peris-Sayol, G.; Payá-Zaforteza, Ignacio; Alós-Moya, J.; Hospitaler, Antonio

doi:10.1016/j.compstruc.2015.06.003

Cited by 44 publications

(17 citation statements)

References 22 publications

(30 reference statements)

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“…The influence of the expansion joint width has been partially studied in [14,15] for non-composite bridges with a small span (12.2m). In this paper, this effect is fully considered as the horizontal movement of the right support is expected to exceed the width of the expansion joint.…”

Section: Boundary Conditionsmentioning

confidence: 99%

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Fire resistance of composite steel & concrete highway bridges

Jiayu

Usmani

Sanad

et al. 2018

Journal of Constructional Steel Research

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In this paper, the effects of geometric skewness and abutment restraint on the fire resistance of a real highway bridge have been studied. Four finite element models have been investigated using rectangular and skew shapes with and without modelling the abutment. The investigation has been carried out in three steps: 1) heat transfer analysis under a specified hydrocarbon fire; 2) simulation of the thermo-mechanical response of the bridge superstructure over the entire duration of the fire using beam and shell elements to represent the structural components; 3) detailed processing and interpretation of the simulation results to understand and illustrate the global response of the structure by comparing all the models. Results indicate that a skew bridge may possess greater inherent resistance to fire. For the two-span highway bridge model, restraint from the abutment does not affect the estimated failure time significantly.

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Section: Boundary Conditionsmentioning

confidence: 99%

“…Published in Journal of Constructional Steel Research, June 2018. doi.org/10.1016/j.jcsr.2018.06.021represent the failure behaviour of a whole bridge frame. Therefore, some other researchers[14][15][16] have…”

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confidence: 99%

Fire resistance of composite steel & concrete highway bridges

Jiayu

Usmani

Sanad

et al. 2018

Journal of Constructional Steel Research

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“…According to the CFD-FEM-based study [13] and experimental validation [14] on a simply supported bridge, this coupled approach can predict the structural behavior in a more complex but more precise way. Peris-Sayol et al [15] adopted the coupled CFD-FEM method to analyze the behavior of a simply supported steel bridge and analyze the parametric influence caused by horizontal constraint, modeled component count, vertical clearance, and wind. Increasing studies in recent years took the coupled CFD-FEM approach as an advanced tool to predict the performance of bridges in various fire conditions [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Coupled CFD‐FEM Simulation of Steel Box Bridge Exposed to Fire

Zhi

2022

Advances in Civil Engineering

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Increasing fire-induced bridge failures are demanding more precise behavior prediction for the bridges subjected to fires. However, current numerical methods are limited to temperature curves prescribed for building structures, which can misestimate the fire impact significantly. This paper developed a framework coupling the computational dynamics (CFD) method and finite element method (FEM) to predict the performance of fire-exposed bridges. The fire combustion was simulated in CFD software, Fire Dynamic Simulator, to calculate the thermal boundary required by the thermomechanical simulation. Then, the adiabatic surface temperatures and heat transfer coefficient were applied to the FEM model of the entire bridge girder. A sequential coupled thermomechanical FEM simulation was then carried out to evaluate the performance of the fire-exposed bridge, thermally and structurally. The methodology was then validated through a real fire experiment on a steel beam. The fire performance of a simply supported steel box bridge was simulated using the proposed coupled CFD-FEM methodology. Numerical results show that the presented method was able to replicate the inhomogeneous thermomechanical response of box bridges exposed to real fires. The girder failed due to the buckling of a central diaphragm after the ignition of the investigated tanker fire in no more than 10 min. The framework presented in this study is programmatic and friendly to researchers and can be applied for the estimation of bridges in different fire conditions.

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“…The fire response of PC bridge girders is significantly different from the building structures. This can be contributed to structural characteristics and geometric configuration and fire exposure intensities (Paya-Zaforteza and Garlock, 2012; Peris-Sayol et al, 2015), that is, thin web, slenderness ratio, high-strength prestressing strands, and fire scenarios encountered. However, no provisions are specified in PC bridge girder as per current standards and codes (Gong and Agrawal, 2015).…”

Section: Introductionmentioning

confidence: 99%

Performance of prestressed concrete box bridge girders under hydrocarbon fire exposure

Song

Zhang

Hou

et al. 2020

Advances in Structural Engineering

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This article presents an approach for investigating performance of prestressed concrete box bridge girders under hydrocarbon fire exposure. A three-dimensional nonlinear finite element model, developed in computer program ANSYS, is utilized to analyze the response of prestressed concrete box bridge girders under combined effects of fire exposure duration and simultaneous structural loading. The model validation is performed using a scaled prestressed concrete box girder exposed to ISO834 fire in furnace. Subsequently, the validated model is used to investigate fire performance of prestressed concrete box bridge girders through taking into consideration some variables, namely concrete cover thickness to prestressing strands, prestress degree, load level, fire exposure length, and position. Through a case study, results from numerical analysis show that concrete cover thickness to prestressing strands and load level has significant effect on fire resistance of prestressed concrete box bridge girders. Increasing prestress degree in prestressing strands can speed up the progression of deflection (sudden collapse) in prestressed concrete box bridge girder toward the final fire exposure stage. Reducing fire exposure length or preventing fire exposure on mid-span zone can highly enhance the fire resistance of simply supported prestressed concrete box bridge girders. Failure of prestressed concrete box bridge girder, under hydrocarbon fire exposure conditions, is governed by rate of deflection failure criterion in particular cases.

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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

Cited by 44 publications

References 22 publications

Fire resistance of composite steel & concrete highway bridges

Fire resistance of composite steel & concrete highway bridges

Coupled CFD‐FEM Simulation of Steel Box Bridge Exposed to Fire

Performance of prestressed concrete box bridge girders under hydrocarbon fire exposure

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