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Effect of column base strength on steel portal frames in fire

Rahman, Mahbubur and Lim, James B.P. and Xu, Yixiang and Hamilton, Robert and Comlekci, Tugrul and Pritchard, David (2012) Effect of column base strength on steel portal frames in fire. Proceedings of the ICE - Structures and Buildings, 166 (4). pp. 197-216. ISSN 0965-0911

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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 SCI 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 SCI design method. Both 2-D and 3-D models are used to analyse a building similar to the Exemplar frame described in the SCI design guide. Using the 2-D model, a parametric study comprising 27 frames is conducted. It is shown that the value of the overturning moment, calculated in accordance with the SCI design method, may not be sufficient to prevent collapse of the frame before 890 °C.

Item type: Article
ID code: 36097
Keywords: dynamic analysis, steel, portal frame, fire , partial rigidity, steel construction institute, SCI, design method, buildings, structures & design, /dynamics, fire engineering, column base strength, Engineering (General). Civil engineering (General), Mechanical engineering and machinery, Mathematics, Building and Construction, Civil and Structural Engineering
Subjects: Technology > Engineering (General). Civil engineering (General)
Technology > Mechanical engineering and machinery
Science > Mathematics
Department: Faculty of Engineering > Civil and Environmental Engineering
Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of Science > Mathematics and Statistics
Depositing user: Pure Administrator
Date Deposited: 23 Nov 2011 15:36
Last modified: 21 May 2015 14:10
Related URLs:
URI: http://strathprints.strath.ac.uk/id/eprint/36097

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