Effect of column base strength on steel portal frames in fire

Mahbubur Rahman; James B.P. Lim; Yixiang Xu; Robert Hamilton; Tugrul Comlekci; David Pritchard

doi:10.1680/stbu.11.00040

Effect of column base strength on steel portal frames in fire

Mahbubur Rahman, James B.P. Lim, Yixiang Xu, Robert Hamilton, Tugrul Comlekci, David Pritchard

Research output: Journal Publication › Article › peer-review

9 Citations (Scopus)

Abstract

In the UK, the design of steel portal frame buildings in fire is based on the Steel Construction Institute (SCI) design method, in which fire protection needs only be provided to the columns, provided that the column bases are designed to resist an overturning moment, M _OTM , calculated in accordance with the Steel Construction Institute design method. In this paper, a non-linear elastic-plastic implicit dynamic finite-element model of a steel portal frame building in fire is described and used to assess the adequacy of the Steel Construction Institute design method. Both two-dimensional and three-dimensional models are used to analyse a building similar to the exemplar frame described in the Steel Construction Institute design guide. Using the two-dimensional model, a parametric study comprising 27 frames is conducted. It is shown that the value of the overturning moment, calculated in accordance with the Steel Construction Institute design method, may not be sufficient to prevent collapse of the frame before 890°C.

Original language	English
Pages (from-to)	197-216
Number of pages	20
Journal	Proceedings of the Institution of Civil Engineers: Structures and Buildings
Volume	166
Issue number	4
DOIs	https://doi.org/10.1680/stbu.11.00040
Publication status	Published - Apr 2013
Externally published	Yes

Keywords

Buildings
Dynamics
Fire engineering
Structures and design

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction

Access to Document

10.1680/stbu.11.00040

Cite this

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title = "Effect of column base strength on steel portal frames in fire",

abstract = " In the UK, the design of steel portal frame buildings in fire is based on the Steel Construction Institute (SCI) design method, in which fire protection needs only be provided to the columns, provided that the column bases are designed to resist an overturning moment, M OTM , calculated in accordance with the Steel Construction Institute design method. In this paper, a non-linear elastic-plastic implicit dynamic finite-element model of a steel portal frame building in fire is described and used to assess the adequacy of the Steel Construction Institute design method. Both two-dimensional and three-dimensional models are used to analyse a building similar to the exemplar frame described in the Steel Construction Institute design guide. Using the two-dimensional model, a parametric study comprising 27 frames is conducted. It is shown that the value of the overturning moment, calculated in accordance with the Steel Construction Institute design method, may not be sufficient to prevent collapse of the frame before 890°C. ",

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AU - Lim, James B.P.

AU - Xu, Yixiang

AU - Hamilton, Robert

AU - Comlekci, Tugrul

AU - Pritchard, David

PY - 2013/4

Y1 - 2013/4

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Effect of column base strength on steel portal frames in fire

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

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