论文部分内容阅读
目前关于钢管混凝土的耐火研究还主要集中在实心构件上,空心钢管混凝土的相关研究则不足。而实心钢管混凝土可以看作是空心钢管混凝土的特例,因此,很有必要将实心和空心钢管混凝土统一在一起进行研究。采用理论和有限元计算相结合的方法,对钢管混凝土构件在标准火灾下的承载力进行了研究。最终,给出了实、空心钢管混凝土构件在标准火灾下任意时刻的承载力计算公式和保护层厚度的计算方法。
At present, the research on fire-resistance of CFST mainly focuses on solid components, and the related research of hollow-steel tube concrete is not enough. Solid concrete filled steel tube can be regarded as a special case of hollow concrete filled steel tube. Therefore, it is necessary to study the solid and hollow concrete together. The combination of theory and finite element method is used to study the bearing capacity of CFST under standard fire conditions. Finally, the calculation formulas of the bearing capacity and the thickness of the protective layer of concrete filled hollow-concrete-filled CFST members under standard fire are given.