engleski

TOWARDS AN ADVANCED, TIME-DEPENDENT ANALYSIS OF FIRE EXPOSED STEEL STRUCTURES

The paper presents new research developments regarding the application of a unified rheological model capable of taking into account the influence of creep at both fast and slow strain-rates on the total strain development of steel structures and their components exposed to fire. This type of advanced material model is necessary in order to enable simulation of material behaviour when a structure is exposed to transient heating regimes, including stationary heating. The aim of developing this type of material model is to provide a reliable time-dependent representation of material behaviour so that numerical simulations of structure response to fire attack are enabled to follow the linked progress of heating and straining, regardless the type of heating curve to which the structural members are exposed. The paper presents further verification of the unified rheological model in modelling a series of stationary creep tests conducted on European Grade S355 steel.

time-dependent behaviour, creep, steel, fire

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