Fire Resistance of Simple Supported Reinforced Concrete Beams Under High Temperature

doi:10.3969/j.issn.1005-3026.2015.10.024

Abstract

Abstract: The experiment of two reinforced concrete beams under high temperatures were conducted. A reasonable material thermal performance and thermal-mechanical coupled constitutive relation were adopted in the 3D finite element model by ABAQUS to analyze the performance of reinforced concrete beams. Temperature field and deformation results agree well with the test results. Based on experiment verifications， the effects of protective layer thickness and the load level on the fire resistance of concrete beams were studied by using finite element parametric analysis. Results showed that the thicker the concrete cover is， the slower the temperature rise of tensile reinforcement is， and the smaller the deflection of speciment is， which means that the fire resistance of reinforced concrete beam is longer. Correspondingly， the fire resistance gets shorter when load level is increased.

Key words: reinforced concrete, finite element, nonlinear analysis, fire resistance;simple supported beam

CLC Number:

TU375

DING Fa-xing， YAO Fei， LI Zhe， YU Zhi-wu. Fire Resistance of Simple Supported Reinforced Concrete Beams Under High Temperature[J]. Journal of Northeastern University:Natural Science, 2015, 36(10): 1476-1481.

References

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