Collapse assessment of protected steel moment frame under post-earthquake fire

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MIRZAEI P.; GERAMI M.

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Journal Paper

Paper Information

Journal: SCIENTIA IRANICA Year:2020 | Volume:27 | Issue:6 (Transactions A: Civil Engineering) Page(s): 2775-2789

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Information Journal Paper

Title

Collapse assessment of protected steel moment frame under post-earthquake fire

Author(s)

MIRZAEI P. | GERAMI M. | Issue Writer Certificate

Keywords

Fire after earthquake

Fireproofing

Heat transfer

Side-way collapse

Thermal-mechanical analysis

Abstract

This paper investigates the behavior of low-, medium-, and high-rise protected steel moment-resisting frames under post-earthquake re through two different methods. In the first method, the pushover analysis was utilized to simulate the response of the sample structures for various target displacements. Then, the Thermal-mechanical analysis was implemented to evaluate the behavior of the damaged frames under fire, assuming that the fi reproofing was delaminated at the end regions of the beams. In the second method, the seismic response of the frames under two sets of the MCE-scaled near-and far-fault ground motion records was determined employing the time history analysis. In this method, the damage of fireproo fing was characterized by the maximum inter-story drift ratio. The results of the study revealed that the first method produced similar results to that of the second method for most cases. It was also found that for sufficiently large drift demands, the collapse of the frames under post-earthquake re occurred in the side-way mode, while for lower seismic responses, the local failure of beams dominated other failure modes. Moreover, it was found that the reduction of fire resistance time due to the effects of Maximum Considered Earthquake (MCE) seismic loads ranged from 4% to 27% for the considered structures.

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APA: Copy

MIRZAEI, P., & GERAMI, M.. (2020). Collapse assessment of protected steel moment frame under post-earthquake fire. SCIENTIA IRANICA, 27(6 (Transactions A: Civil Engineering)), 2775-2789. SID. https://sid.ir/paper/974657/en

Vancouver: Copy

MIRZAEI P., GERAMI M.. Collapse assessment of protected steel moment frame under post-earthquake fire. SCIENTIA IRANICA[Internet]. 2020;27(6 (Transactions A: Civil Engineering)):2775-2789. Available from: https://sid.ir/paper/974657/en

IEEE: Copy

P. MIRZAEI, and M. GERAMI, “Collapse assessment of protected steel moment frame under post-earthquake fire,” SCIENTIA IRANICA, vol. 27, no. 6 (Transactions A: Civil Engineering), pp. 2775–2789, 2020, [Online]. Available: https://sid.ir/paper/974657/en

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