关键词: 超高层建筑, 玻璃幕墙, 机械排烟, 数值模拟, 烟气

Abstract: FDS software was used to analyze the indoor temperature, visibility, CO concentration and smoke spread law of a super-high-rise standard office floor under different smoke extraction modes and ambient wind when glass curtain wall rupture. The results show that: When the mechanical smoke exhaust is closed, the effects of indoor smoke extraction from high to low were broken glass curtain wall under no wind, unbroken glass curtain wall and broken glass curtain wall under wind; When the mechanical smoke extraction works, the effects of indoor smoke extraction from high to low were unbroken glass curtain wall, broken glass curtain wall without wind, and broken glass curtain wall under wind; When the mechanical smoke exhaust is closed, the broken glass curtain wall under no wind can be used as a natural smoke exhaust outlet, which is beneficial to indoor smoke exhaust; When the broken curtain wall is under wind, the environmental wind will restrain the smoke exhaust; When mechanical smoke extraction works, whether there is wind or no wind, the breakage of glass curtain wall will lead to the reduction of mechanical smoke extraction efficiency. Therefore, a safe and reliable mechanical smoke exhaust system should be set up in super high-rise buildings, and glass curtain walls with higher fire resistance should be selected.

Key words: ultra-high rise building, glass curtain wall, mechanical smoke extraction, numerical simulation, fire smoke