Stability and Integrity of Cold-formed Steel Mid-rise Building in Post-Earthquake Fire

在北美取得巨大成功后，在住宅和商业建筑中应用冷弯型钢框架的全球趋势正在向高达9层的中层建筑发展，特别是在地震地区，这些建筑传统上依赖于较重的建筑材料。从历史上看，强震后火灾的风险非常高（1906年旧金山弗朗西斯科、1923年东京、1989年洛马普列塔、1994年北岭和1995年科比），对地震区的公共安全和财产构成重大威胁。目前，建筑物的设计符合现代建筑规范，将地震和火灾视为单独的危险，消防安全是基于防火和结构系统的完整性和正常性能的假设。在地震后火灾的情况下，这两个系统都可能在地震中受损;因此，结构对后续火灾的抵抗力可能会严重下降。

Following its great success in North America, the worldwide trend of applying cold-formed steel framing in residential and commercial building construction is advancing to mid-rise buildings up to nine storeys, particularly in seismic regions, where such buildings traditionally have relied on heavier construction materials. Historically, risks associated with fire following a strong earthquake are very high (1906 San Francisco, 1923 Tokyo, 1989 Loma Prieta, 1994 Northridge and 1995 Kobe), posing a major threat to public safety and property in seismic regions. Buildings are currently designed to conform to modern building codes treating earthquakes and fires as separate hazards, and fire safety is based on the assumption of the integrity and normal performance of fireproofing and structural system. In the case of post-earthquake fire, both systems can be damaged in an earthquake; therefore, the structural resistances to subsequent fires can be seriously degraded.