Behavior Analysis of Circular Steel Tube under Fire

Abstract

Abstract&#8212 Recently, a tremendous loss of lives open occurred by collapse of structures under fire. Steel members were applied main member as column and beam in building for good performance and construction efficiency. Fire resistance performance of steel structure was very important because it rapidly changed according to high temperature. Buckling behavior of steel structure under fire was imperative because it can local buckling failure by reduction of structural material properties by temperature. In this paper, Elastic buckling behavior of circular steel tube under fire was investigated through finite element analysis. Parameters for this analysis were selected diameter-thickness ratio, fire exposure area, and fire scenarios. Elastic buckling strength of circular steel tube was rapidly reduced subjected to the fire curve. Local buckling was occurred that this can be lead global failure. When fire resistance design of circular steel tube was performed, buckling behavior must be considered.performance of steel structure was very important because it rapidly changed according to high temperature. Buckling behavior of steel structure under fire was imperative because it can local buckling failure by reduction of structural material properties by temperature. In this paper, Elastic buckling behavior of circular steel tube under fire was investigated through finite element analysis. Parameters for this analysis were selected diameter-thickness ratio, fire exposure area, and fire scenarios. Elastic buckling strength of circular steel tube was rapidly reduced subjected to the fire curve. Local buckling was occurred that this can be lead global failure. When fire resistance design of circular steel tube was performed, buckling behavior must be considered.