Papers (estruturas em incêndio) #temperature

Steel elements behave differently in fire case when isolated or embedded in building walls. The wallson one hand have a favorable effect protecting the elements from the excessive heating resulting fromthe fire and on the other hand they have a detrimental effect due to the thermal gradients originated inthe elements cross-section. The simplified calculation methods proposed in EN 1993-1-2 for fire designdo not take into account the case of steel elements embedded in walls, stipulating only a formulationfor the assessment of the resistance for uniform temperature distribution. This paper presents a proposalof 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 partiallyembedded 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 tothe wall surface provide greater thermal gradients in the cross-sections.