PREMESSE PER UN METODO SEMPLIFICATO PER IL CALCOLO DELLA RISPOSTA DI STRUTTURE IN CASO DI INCENDIO

The protection of human life and the prevention of irreparable damages in case of fire have become a compulsory requirement and a trend research topic. In strategic structures it is important to limit deformations in order to guarantee the building serviceability also in case of fire. In this work the authors develop a procedure to estimate the deformations of a simple frame subjected to fire. By means of the SAFIR code a nonlinear structural analysis has been considered as a benchmark for structures under standard fire conditions. Hence, “effective temperatures” have been determined imposing the equality of deformations obtained by linear calculation and the ones obtained by SAFIR. The results show an acceptable error percentage taking into account the coarse approximations involved in the procedure. The “effective temperatures” method allows early assessments of the serviceability limit state of complex structures partially subjected to fire.