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1、立项背景钢-混凝土组合结构具有延性好、承载能力高等优点,在高层建筑结构中应用较多,而钢管混凝土结构和型钢混凝土结构是两种典型的钢-混凝土组合结构。目前,《建筑设计防火规范》GB50016还缺乏这类结构的抗火设计方法。而且,国内外在钢-混凝土组合结构抗火设计方法方面的研究成果很少,导致这类结构的抗火设计缺乏依据。另外,对于遭受火灾的钢-混凝土组合结构需要对其火灾后的静力性能和抗震性能进行评估,为火灾后修
1. Background The steel-concrete composite structure has the advantages of good ductility and high bearing capacity. It is widely used in high-rise building structures. Steel-concrete and steel-concrete structures are two typical steel-concrete composite structures. At present, the “Code for Fire Protection in Architectural Design” GB50016 still lacks the fire-resistance design method for this type of structure. Moreover, there are few research results on fire-resistance design methods for steel-concrete composite structures at home and abroad, resulting in lack of basis for fire-resistance design of such structures. In addition, for the steel-concrete composite structure subjected to fire, it is required to evaluate the static performance and seismic performance after fire, and to repair the fire.