Experimental and numerical investigations of steel profiles with intumescent coating adjacent to space-enclosing elements in fire

In this paper, the research program "Optimized use of intumescent coating systems on steel members" is presented. The aim of the project is to quantify the influence of spaceenclosing elements on the thermal behavior of supporting steel members. Those elements partially result in a restrained expansion of the fire protection system. Experimental investigations on coated beams and columns directly connected to space-enclosing elements are presented. Additionally, numerical simulations are performed for temperature field calculations of steel elements with intumescent coating. As a new development, the numerical model takes into account the expansion process of the intumescent coating.