DEFORMATION AND STRENGTH OF STEEL FRAME STRUCTURE IN FIRE ENVIRONMENTS

Material Properties of SS 41 steel in high temperature is represented in function form by assuming an independence between instantaneous plastic strain and time-dependent creep strain, in which the latter is formulated by a rheology model including the effect of non-stational creep. Effect of prior plasticity on subsequent creep is discussed. Deformation of multi-story one-span steel frame structures in fire is analyzed using finite element method. Strength of structure during fire is evaluated by a serviceability limit load.