Chování ocelových konstrukcí během požáru

Abstract

The research in the field of structures exposed to fire has an important place among the up to date topics of engineering science. Structures under fire loading may be exposed apart from mechanical loading also to high temperature. The main reason for the research in this branch is to gain prediction of structural behavior according to fire scenario to prevent accidents and human loss. Steel exposed to high temperature loses its strength and stiffness. There is a possibility of using fire protection to slow down increasing temperature of material. Fire resistance of unprotected sections is rather low and depends on dimensions of the used elements. Comparison of computational results with the reality is of great importance today. In this work some experimental testing to analyze behavior of steel frame structures under fire loading including solution of thermal analysis is conducted. The results of experimental testing are analyzed and compared with numerical modeling and also analytical solutions. Achievements related to problems of steel structure behavior during fire are summarized in this work and conclusions and recommendations for next development of this field are formulated.