Abstract
Aim: The paper presents results from the research of fire temperatures influence on steel-concrete bond and the estimation of this influence on bond reduction. In this paper the bond test results for ribbed steel B500SP and BSt500S to C30/37 concrete in the after-fire conditions (‘cold test’) including various cooling conditions - therein shock cooling by water in the course of construction extinguishing actions and in the fire (‘hot test’) has been described. In all studied cases a significant reduction of bond was stated as a result of high temperatures. The research subject is closely related to the construction structures safety during the fire and the after-fire construction structures usability resulting from conducted extinguishing actions. The research has been carried out as part of project: ‘Innovative measures and effective methods of improving the safety and the durability of buildings and transport infrastructure in the sustainable development strategy’ POIG.01.01.02-10-106/09-01.