Evaluation of fire resistance of rectangular steel columns filled with fibre-reinforced concrete

Kodur, V.K.R.; Lie, T.T.

doi:10.1139/cjce-24-3-339

Cited by 3 publications

(7 citation statements)

References 4 publications

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“…If a column is adequately restrained on both ends via a connection with adjoining members, fire resistance can be enhanced appreciably due to redistribution of moments between critical sections of the column. In addition, CFHSS columns can fail locally (without collapse) due to local crushing of the concrete on the inside, or local buckling of the steel wall [18][19][20]. Thus, local stability should also be accounted for in the analysis.…”

Section: Failure Criterionmentioning

confidence: 99%

“…In this model, the fire resistance is evaluated in various time steps, consisting of the calculation of the temperature of the fire, to which the column is exposed, the temperatures in the column, their deformations and strength during exposure to fire, and finally, their fire resistance. Full details on the development and validation of these models are given in references [20,24,29].…”

Section: Experimental and Numerical Studiesmentioning

confidence: 99%

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An Approach for Evaluating the Fire Resistance of CFHSS Columns under Design Fire Scenarios

Fike¹,

Kodur²

2009

Journal of Fire Protection Engineering

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The use of concrete filling offers a practical alternative for achieving the required fire resistance in steel hollow structural section columns. However, the current prescriptive-based approach which evaluates fire resistance based on standard fire exposure does not account for realistic fire scenarios in the design of concrete-filled hollow structural section (CFHSS) columns. This article presents a methodology for evaluating the fire resistance of CFHSS columns under design fire scenarios without the need for costly computational models. The proposed approach is a derivative of the equal area concept, and evaluates the equivalent fire resistance of the column by comparing the time temperature curve of the standard fire exposure with that of the design fire exposure. The method has been validated against the results generated from finite element analysis (coupled heat transfer and strength analysis) on numerous CFHSS columns under a large number of design fires. The applicability of the approach in design situations is illustrated through a numerical example, and it is concluded that the proposed approach offers an attractive alternative for deriving equivalent fire resistance of CFHSS columns exposed to design fire scenarios.

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Section: Failure Criterionmentioning

confidence: 99%

Section: Experimental and Numerical Studiesmentioning

confidence: 99%

An Approach for Evaluating the Fire Resistance of CFHSS Columns under Design Fire Scenarios

Fike¹,

Kodur²

2009

Journal of Fire Protection Engineering

Self Cite

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“…Temperature prediction for concrete-filled steel tubular (CFST) columns has been introduced by Lie and Chabot (1990a) and Kodur and Lie (1997a). In the research of Lie and Chabot (1990a), the temperature profiles were calculated based on one-dimensional (1D) finite difference method (FDM) for unprotected circular CFST columns.…”

Section: Introductionmentioning

confidence: 99%

“…In the research of Lie and Chabot (1990a), the temperature profiles were calculated based on one-dimensional (1D) finite difference method (FDM) for unprotected circular CFST columns. The method of Kodur and Lie (1997a) was based on two-dimensional (2D) FDM and for unprotected square CFST columns. The cross section was discretized in triangular network where the elements were square inside the steel and concrete sections and triangular at column surface and at interface of concrete and steel sections.…”

Section: Introductionmentioning

confidence: 99%

“…For further calculating the fire resistance of CFST columns based on fiber element method or simple calculation models in Eurocode 4, the triangular network needed to be transformed into a square network. In addition, heat convection was ignored in both calculation models of Lie and Chabot (1990a) and Kodur and Lie (1997a). This would affect predictions in low temperature range which is governed by the heat convection.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation on thermal behavior of concrete-filled steel tubular columns based on modified finite difference method

Xiong

Wang

Liew

2016

Advances in Structural Engineering

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This article presents a modified finite difference method specific for predicting temperatures in concrete-filled steel tubular composite columns. The modifications were based on existing researches on heat transfer analyses of composite columns by finite difference method. The temperature predictions by the modified method were implemented via MATLAB. Validity was established by comparing the predicted temperatures with test results and those obtained from finite element analyses via ABAQUS. The comparisons showed reasonable predictions by the modified finite difference method. Sensitivity studies were also carried out on the effects of emissivity of fire, thermal contact resistance, thermal property model, and cavity ratio based on the modified method. Through the implementation with MATLAB, it is attractive to calculate fire resistance of the concrete-filled steel tubular columns by combining the modified method with the simple calculation models according to Eurocode 4.

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Heat transfer analysis of special reinforced NSC-columns under severe fire conditions

Sismanis

2010

International Journal of Materials Research

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The 3-D heat conduction equation was numerically solved and the temperature distribution inside two special metallic frames, loaded with the proper number of reinforced bars, encased by normal strength concrete in the final columnar form, and subject to intense fire conditions, was computed by time. Typical temperature profiles were applied for the simulation of the cellulosic and hydrocarbon kinds of fire. Heat transfer by radiation and convection was included in the surrounding the column medium under fire, testing various convective heat-transfer coefficients. Computational results were analyzed until the critical time period in which the integrity and the mechanical strength of the column were reversible, considering fire abatement until that time.

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Evaluation of fire resistance of rectangular steel columns filled with fibre-reinforced concrete

Cited by 3 publications

References 4 publications

An Approach for Evaluating the Fire Resistance of CFHSS Columns under Design Fire Scenarios

An Approach for Evaluating the Fire Resistance of CFHSS Columns under Design Fire Scenarios

Evaluation on thermal behavior of concrete-filled steel tubular columns based on modified finite difference method

Heat transfer analysis of special reinforced NSC-columns under severe fire conditions

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