Comparison of Steel Trusses Analysed with Different Types of Fire Curves

Abstract:

The paper provides the analysis of steel truss under fire conditions according to the temperature method. The analysis was carried out for two variants of the fire curves (the standard one, used in traditional approach to fire design and a new one, proposed by the authors, called "exponential" curve). Both curves describe temperature of fire gases but they are obtained using different scenarios. In the case of the standard fire curve, increase in temperature is very rapid in the first minutes and then it decelerates. The exponential curve describes inverse situation: slow increase in temperature of fire gases followed by more rapid one. The fire history defined by the fire curve has great influence on temperature of an element in successive minutes of fire.

• Periodical: Applied Mechanics and Materials (Volume 797)
• Pages: 108-114
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.797.108
• Online since: November 2015
• Authors: Katarzyna Kubicka*, Urszula Radoń
• Keywords: Fire Analysis, Fire Curves, Steel Truss, Temperature Method

References

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[2] PN-EN 1993-1-2. Design of steel structures. Part 1-2: General rules: Structural fire design.

[3] PN-EN 1991-1-2. Actions on structures. Part 1-2: General actions: Action on structures exposed to fire.

[4] M. Maślak, The fire durability of steel bar structures, Politechnika Krakowska, Kraków, 2008 (in Polish).