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Structural Engineering and Mechanics
  Volume 6, Number 3, April 1998, pages 275-289
DOI: http://dx.doi.org/10.12989/sem.1998.6.3.275
 


Temperature-time analysis for steel structures under free conditions
Wong MB, Ghojel JI, Crozier DA

 
Abstract
    The objective of the paper is to present a method whereby the time required for a steel structure to sustain the effects of a prescribed temperature rise according to real fire curves can be calculated. The method is divided into two parts. The first part deals with the post-yield behaviour of steel structures at elevated temperatures. It takes into account the variation of the properties of steel material with temperature in an incremental elastoplastic analysis SC, that the safety factor of the structure under certain fire conditions can be assessed. The second part deals with the heat transfer problem of bare steel members in real fire. Factors affecting the heat transfer process are examined and a model for predicting the temperature variation with time under real fire conditions is proposed. This model results in more accurate temperature predictions for steel members than those obtained from previously adopted model.
 
Key Words
    fire, temperature prediction, elastoplastic analysis, steel
 
Address
Wong MB, Monash Univ, Dept Civil Engn, Melbourne, Vic 3004, Australia
Monash Univ, Dept Civil Engn, Melbourne, Vic 3004, Australia
Monash Univ, Dept Mech Engn, Melbourne, Vic 3004, Australia
 

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