Performance of steel beams at elevated temperatures under the effect of axial restraints

Liu, T.C.H.; Davies, J M

doi:10.12989/scs.2001.1.4.427

Cited by 16 publications

(16 citation statements)

References 5 publications

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“…It can be seen that the simulation results are in very good agreement with the test results, the accuracy of the authors' simulations being comparable to that of the independent study of Liu and Davies [9]. The initial slower rate of increase in the compression force in some tests than the numerical simulation results can be explained by the initial low axial stiffness of the end restraint to the test beam before it became fully effective.…”

Section: Comparison With Test Results Of Liu Et Al [8]supporting

confidence: 75%

“…The numerical simulations correctly predicted the acceleration in beam vertical deflections and the rapid change in beam end reaction forces. Also, both the authors' simulations and those of Liu and Davies [9] predicted a similar occurrence of catenary action had the fire tests been allowed to continue. Furthermore, Fig.…”

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 69%

“…Although many fire tests have been conducted over many years around the world, except for the tests of Liu et al [8,9], all test beams were supported on rollers without axial restraint. Some axially restrained column tests were reported, but they were only concerned with compression induced by restraint to the column's expansion, not tension induced by restraint to the column's shortening.…”

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 99%

“…Some axially restrained column tests were reported, but they were only concerned with compression induced by restraint to the column's expansion, not tension induced by restraint to the column's shortening. Therefore, this paper only considered the experiments of Liu et al [8,9], who conducted a series of fire tests to study the large deflection behaviour of restrained steel beams in the Fire Research Laboratory at the University of Manchester. The steel beam was either unprotected or partially protected and was restrained between two columns to give a structure similar to a rugby goal post as shown in Fig.…”

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 99%

“…In each figure, results are shown for the two levels of loading, having load ratios of 0.5 and 0.7. The independent analysis results of Liu and Davies [9] are also given in Figs. 4 and 5 for comparison.…”

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 99%

See 4 more Smart Citations

A numerical study of large deflection behaviour of restrained steel beams at elevated temperatures

Yin

Wang

2004

Journal of Constructional Steel Research

114

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Section: Comparison With Test Results Of Liu Et Al [8]supporting

confidence: 75%

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 69%

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 99%

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 99%

Section: Comparison With Test Results Of Liu Et Al [8]mentioning

confidence: 99%

See 3 more Smart Citations

A numerical study of large deflection behaviour of restrained steel beams at elevated temperatures

Yin

Wang

2004

Journal of Constructional Steel Research

114

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Flexural design curves of steel plate I‐girders at elevated temperatures: I‐girders with yield or local buckling failure mode

Rasoulnia,

Broujerdian,

Ghamari

et al. 2023

Structural Design Tall Build

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SummaryThe present study was undertaken to characterize the structural behavior and ultimate flexural strength of steel plate I‐girders under pure flexural moment at elevated temperatures. A novel design procedure along with flexural design curves was proposed to predict the flexural behavior of the I‐girders and estimate corresponding ultimate flexural strengths. The main strategy of the procedure is to find an ambient‐temperature equivalent of the I‐girder by quantifying and formulating the effects of elevated temperatures. The proposed procedure comprises overall and partial phases. The former phase deals with the determination of equivalent laterally unbraced length, and the latter phase addresses the equivalent web and compression flange slenderness parameters. The calibration factor was defined to adapt the design curves to the effects of high compression flange slenderness parameters and residual stress at elevated temperatures. To generate comparative results, a numerical study was conducted by analyzing 216 finite element (FE) models. Fifty‐four out of 216 FE models with different cross‐sectional elements were dedicated to the I‐girders fail by yield or local buckling failure mode, the results of which are reported in the present paper. Data fitting analysis was carried out to capture the variation of calibration factor with respect to compression flange slenderness parameters. By calibrating the proposed design procedure, the results were converged and, therefore, good conformity was reached between the numerical and parametric results.

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An improved flexural design procedure of steel plate I‐girders considering elastic lateral torsional buckling at elevated temperatures

Rasoulnia,

Broujerdian,

Ghamari

2024

Structural Design Tall Build

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In the present study, an improved design method is proposed for the flexural design of steel plate I‐girders at elevated temperatures. The proposed method accounts for two important phenomena accompanying the temperature increase in steel I‐girders: (1) alteration of the failure mode and (2) degradation of the material properties. The main strategy of the proposed procedure is to find the ambient‐temperature‐equivalent design parameters of steel I‐girders at elevated temperatures. The basic design relationships are adopted from the flexural design provisions of AISC 360‐16 and then modified to accommodate the elevated temperatures and instability conditions of I‐girders. To evaluate the accuracy and efficiency of the proposed method, a comprehensive finite element study is conducted using ABAQUS. To this aim, 54 numerical models of steel plate I‐girders with different cross‐section slenderness parameters were investigated. All the simulated I‐girders were prone to fail in elastic lateral‐torsional buckling mode at both ambient temperature and elevated temperatures. To corroborate the numerical modeling and analysis process at ambient and elevated temperatures, the results were verified against the available experimental data. Based on the results, the maximum absolute deviation of the ultimate flexural strength obtained from the proposed method from the finite element predictions was 9%.

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Performance of steel beams at elevated temperatures under the effect of axial restraints

Cited by 16 publications

References 5 publications

A numerical study of large deflection behaviour of restrained steel beams at elevated temperatures

A numerical study of large deflection behaviour of restrained steel beams at elevated temperatures

Flexural design curves of steel plate I‐girders at elevated temperatures: I‐girders with yield or local buckling failure mode

An improved flexural design procedure of steel plate I‐girders considering elastic lateral torsional buckling at elevated temperatures

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