Fire Resistance of Cast Iron Columns

摘要

The paper presents a procedure for the structural appraisal of old cast-iron columns exposed to fire. Temperature of the gas during the fire is assumed according to the nominal standard fire curve. Transfer of heat is modelled by the FE procedure which allows to take into account not only the hollow section particularity but also the improvement by filling by concrete and to utilise the intumescent coating protection. The buckling resistance is predicted by a generalised column bucking curve formulation modified for the cast iron as well as for the elevated temperature. The results are employed on the case study of the columns used for reconstruction of the Vinohrady brewery in Prague.