Failure Analysis Of Steel Structure After Fire And Fire Protection

Fire disaster should not be neglected in recent years, with the development of steel structure, refractory worse performance as important defected of steel structure buildings with the temperature is more and more outstanding, the growth, the strength of steel and the elastic modulus of mechanics index plunged. When this happened, the steel structure would be seriously damage or even collapsed and caused serious catastrophic consequences. There's a serious impacted on the development of steel structure buildings. After September 11, many experts and scholars have done researched on steel structure fire resistance performance and its research methods mostly dependent on experiment. This method can be used to measure component failure situation of cost. But it's costly too. Therefore, by ANSYS finite element analysis software, under fire in the steel structure of the computer simulation analysis of failure has important theoretical significance and economic value. Based on the comprehensive steel structure according to research dynamic fire resistance classic, the study of finite element heat transfer red theory and considered ideas of material and geometrical nonlinearity's steel frame under the fire of failure analysis compared and analyzed the different sectional formed two types of steel frame after the fire, the failure state of steel structure of cross section shape fire resistance properties and the steel structure of fire protection methods and analyzed the fire resistance for steel structure design to provide necessary basis.