Based on different loading areas of steel structure framework simulation research of fire resistance performance

摘要

Based on finite element analysis software ANSYS, a company warehouse properties of door type steel frame structure has been studied under the action of fire. Taking the whole structure as research object, the paper used beam element and shell element to simulate the column, prime beam, second beam and concrete slab in the structure respectively. When linking the slab and the beam by beam connection and linking the column and the beam by pin connection at the same time, the influences of the whole structure have been considered based on different areas affected by fire. The results of analysis draw three conclusions. Firstly, large-span and strong constraints beam of structure and column-beam joint are the adverse regions affected by fire. Secondly, the column which bears multiple components is the weak link of steel structure. Finally, it is the temperature gradient in the direction of slab thickness that plays a crucial role in the ability of the overall fire resistance of steel structure.