Due to the accordion effect

corrugated steel webs are only able to resist shear force.The shear force in the web can cause three different buckling modes: local

global and interactive shear buckling.Although several researchers have investigated it in normal temperature

the shear buckling behavior of the corrugated webs exposed to fire has not yet been clearly investigated.Three different shear buckling modes of corrugated steel web beam under high temperature of fire in different time are investigated on the basis of temperature variation of beam.The effect of high temperature on material property of structural steel is taken into account in this paper.The expressions of critical shear stress and shear buckling parameter are proposed and their variation trends with high temperature of fire are analyzed.A recommedation is proposed that the load-carrying capability status should be unbiased estimated on the basis of the variation of shear buckling coefficient in order to provide more accurate predictions for the load-carrying capacity of corrugated steel web beam in fire.