A simplified calculation method for temperature evaluation of steel columns embedded in walls

作者：Correia Antonio M; Rodrigues Joao Paulo C^*; Silva Valdir P

来源：Fire and Materials, 2011, 35(7): 431-441.

DOI：10.1002/fam.1063

• fire
• steel
• column
• wall
• section factor

Steel elements behave differently in fire case when isolated or embedded in building walls. The walls on one hand have a favorable effect protecting the elements from the excessive heating resulting from the fire and on the other hand they have a detrimental effect due to the thermal gradients originated in the elements cross-section. The simplified calculation methods proposed in EN 1993-1-2 for fire design do not take into account the case of steel elements embedded in walls, stipulating only a formulation for the assessment of the resistance for uniform temperature distribution. This paper presents a proposal of a new simplified calculation method to evaluate the temperature of steel columns embedded in walls. The method is based on numerical simulations and fire resistance tests. Steel columns totally or partially embedded in walls, with the web perpendicular or parallel to the wall surface, were tested.
In the study it was also observed that thicker walls or H steel columns with the web perpendicular to the wall surface provide greater thermal gradients in the cross-sections.

• 出版日期2011-11