Impact of partially damaged passive protection on the fire response of bolted steel connections using finite element analysis

This article aims to quantify the impact of a potential failure passive fire protection on ultimate response top and seat steel connection with double web angles. A numerical, finite element analysis scheme is proposed considering real, semi-rigid behaviour connection, using unilateral contact-friction laws between interfaces beam, column, The model has been validated by previous experimental research at ambient temperatures. Scenarios unprotected connections, undamaged partially damaged protections are numerically tested. change in mode reduction strength equal 28% for standard 35% hydrocarbon arise protection. In this case, maximum temperatures locally beam reach ones (900 °C), which more than 800 °C higher Significant temperature increases 288 406 fires also angle, compared