点式安装玻璃幕墙在火灾中的破裂行为

As the weakest part of building structures, glass facades may easily break in fires, which will change the enclosure fire dynamics by creating new openings for air to enter. A series of 1200 mm×1200 mm×6 mm soda-lime glass panes were heated by a 500 mm×500 mm n-heptane pool fire to investigate the breakage and fallout behavior of point-supported glass curtain wall. The time of breakage occurrence, crack initiation and propagation, heat release rate, central gas temperature, glass surface temperature and loss of integrity of the glazing assembly were obtained. Moreover, finite element method was employed to predict the crack initiation and growth. The simulated thermal stress can reveal the breakage mechanism of glass facades.