火灾后钢筋混凝土梁剩余承载力评估分析

Analysis of Residual Bearing Capacity Assessment of Reinforced Concrete Sorghum after Fire

为评估钢筋混凝土(RC)结构构件在火灾后的剩余承载力,而非RC梁在高温下的表现,文中依据构件受火前室温下的性能、受火期间的耐火性、冷却后的火后残留强度,分析火灾暴露RC梁剩余能力。该评估分析使用有限元数值模型进行,借助前人的研究成果,证明该方法具备可行性,并分析了具体案例中的火灾后RC梁剩余承载力。

To evaluate the residual bearing capacity of reinforced concrete(RC)structural components after a fire,rather than the performance of RC beams at high temperatures,this paper analyzes the residual capacity of RC beams exposed to fire based on their performance at room temperature before fire,fire resistance during fire,and residual strength after cooling.This evaluation analysis was conducted using a finite element numerical model.With the help of previous research results,the feasibility of this method was demonstrated,and the residual bearing capacity of RC beams after a fire was analyzed in specific cases.