Post-Earthquake Fire performance-based behavior of unprotected moment resisting 2D steel frames

Behnam, Behrouz; Ronagh, Hamid Reza

doi:10.1007/s12205-012-0527-7

Cited by 21 publications

(9 citation statements)

References 15 publications

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“…Other studies have reached a similar conclusion, by employing a push-over analysis to determine the seismic response of unprotected moment-resisting steel frames designed according to Eurocode (EN1998-1, 2004) and by considering both standard and natural curves as fire exposure [15,16].…”

Section: State Of the Artmentioning

confidence: 74%

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Post-earthquake fire resistance of steel buildings

Jelinek¹,

Zania²,

Giuliani³

2017

Journal of Constructional Steel Research

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Section: State Of the Artmentioning

confidence: 74%

“…The investigation is conducted by means of a sequential analysis, i.e. it consists of the following sequence of separate analysis steps [16]. Geometrical nonlinearities were considered for the last two analysis steps by means of a large displacement formulation.…”

Section: Numerical Analysismentioning

confidence: 99%

Post-earthquake fire resistance of steel buildings

Jelinek¹,

Zania²,

Giuliani³

2017

Journal of Constructional Steel Research

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“…Another study was performed by Behnam and Roangh () on the PEF response of two different moment‐resisting steel structures designed as a school and a residential building. They showed that the residential buildings are more vulnerable to PEF loads than the school structures.…”

Section: State Of the Artmentioning

confidence: 99%

Structural response of vertically irregular tall moment-resisting steel frames under pre- and post-earthquake fire

Behnam

2015

Struct. Design Tall Spec. Build.

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SUMMARYPost-earthquake fires (PEF) may result in a catastrophe in urban regions even worse than the earthquake itself. Most urban structures are not designed to resist two subsequent extreme loads such as earthquake and fire. Thus, these types of structures are too weak when subjected to the PEF loads. On the other hand, it is well understood that irregular building structures are more susceptible to sustain earthquake damage than regular buildings. Investigating irregular buildings can therefore be more important when there is a high possibility of PEF. While there are various irregularities, here, vertical irregularity is considered. The study is performed on one irregular seven-story tall moment-resisting steel frame designed based on the American Society of Civil Engineers code. The frame is firstly subjected to an earthquake load with the peak ground acceleration of 0.35 g and then is exposed to a generalized exponential fire curve. To make a comparison between the results, the PEF analysis is also performed for the regular frame. The results show that there is a marked difference between the PEF of the regular frame with that of the irregular frame. In addition, two types of failure-local and global-were observed during the analysis, where the local collapse is related to the deflection of beams, and the global collapse is pertained to the considerable movement of the columns. It is observed during the analysis that the irregular frames are more susceptible to collapse globally.

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“…The investigation of different fire scenarios including constant fire and vertically traveling scenarios revealed that the fire scenario affects both the fire resistance time and failure mode of the structures under post-earthquake fire. In another research, Behnam and Ronagh analyzed the behavior of two sample structures with the same geometric configuration, one designed as a residential building and the other designed as a school structure [10]. They found that the design specifications dominate the behavior of the frames under fire loads, as the school structure endured more time under pre-and post-earthquake fire.…”

Section: Introductionmentioning

confidence: 99%

Collapse assessment of Protected Steel Moment Frame under Post-earthquake Fire

Gerami

Mirzaei

2019

Scientia Iranica

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Postal code: 3513119111, Semnan, Iran Tel: +989125540046 Fax: +982333321005 Biographical notes: Pouria Mirzaei is a PhD student in the field of earthquake engineering in Semnan university of Iran. He has receive his M.Sc. degree from Iran University of science and technology (IUST) in 2012. He is working in a civil engineering company as a consultant engineer. His major specialty relates to fire engineering and modelling of structural systems. Mohsen Gerami is a Professor of civil engineering in Semnan University of Iran. He has received his Ph.D. from Tarbiat Modares University in 2003. His studies cover a wide range of topics in the structural and earthquakes engineering, including dynamic analysis of structures, performance based engineering, near fault ground motion effects and fire engineering. AbstractThis paper investigates the behavior of low-, medium-and high-rise protected steel moment resisting frames under post-earthquake fire through two different methods. In the first method, the pushover analysis is utilized to simulate the response of the sample structures for various target displacements. Then the thermal-mechanical analysis is implemented to evaluate the behavior of the damaged frames under fire, assuming that the fireproofing is 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 is determined employing the time history analysis. In this method, the damage of fireproofing is characterized by the maximum inter-story drift ratio. The results of the study revealed that the method 1 give similar results to the method 2, for most cases. It is also found that for sufficiently large drift demands, the collapse of the frames under post-earthquake fire occurs in side-way mode, while for lower seismic responses, the local failure of beams dominates other failure modes. Moreover, it was found that the reduction of fire resistance time due to the effects of MCE seismic loads ranges 4% to 27% for the considered structures.

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Post-Earthquake Fire performance-based behavior of unprotected moment resisting 2D steel frames

Cited by 21 publications

References 15 publications

Post-earthquake fire resistance of steel buildings

Post-earthquake fire resistance of steel buildings

Structural response of vertically irregular tall moment-resisting steel frames under pre- and post-earthquake fire

Collapse assessment of Protected Steel Moment Frame under Post-earthquake Fire

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