The behavior of steel perimeter columns in a fire

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1 Scopus citations

Abstract

This study investigates the thermal and structural effects of fire protection, the slab, and the connection fixity on the thermal and structural behavior of perimeter columns in a common steel-framed high-rise building exposed to fire. A model is developed based on a tall steel building (of common construction) that was subject to conflagration in the last decade. The progression of the fire from floor to floor as it moved up the building is considered in developing the time-temperature curves for the analyses. Structural analyses therefore consider that some floors are cooling down while others are heating up. Results show that the beams framing into perimeter columns expand significantly and induce large moments in the perimeter columns, which may lead to the development of plastic hinges. The development of many plastic hinges in a frame could lead to overall structural instability. This phenomenon is essentially independent of the beam-to-column connection fixity and the presence/absence of a slab; therefore fire protection designs for perimeter columns should consider the beams framing into them, which are integral to structural stability.

Original languageEnglish (US)
Pages567-579
Number of pages13
StatePublished - Nov 15 2005
Event2005 Structures Congress and the 2005 Forensic Engineering Symposium - Metropolis and Beyond - New York, NY, United States
Duration: Apr 20 2005Apr 24 2005

Other

Other2005 Structures Congress and the 2005 Forensic Engineering Symposium - Metropolis and Beyond
CountryUnited States
CityNew York, NY
Period4/20/054/24/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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