高温下足尺钢筋混凝土梁试验研究及数值分析

为了给钢筋混凝土结构提供抗火分析的依据和方法,结合对结构火灾损伤的分析,采用有限元方法对高温下足尺钢筋混凝土梁的力学性能和变形反应进行了数值分析,并与试验结果进行了比较,吻合良好,并得出足尺试件高温反应的一些基本特征.结果表明:升温时间、配筋率对高温下足尺钢筋混凝土梁的力学性能和变形反应影响较大.该试验与理论分析结果具有十分重要的工程价值.

Experimental investigation and numerical analysis for RC beams under elevated temperature

In order to offer the basis and method for the analysis of fire resistance of concrete structure,based on the behavior and computing models of material under elevated temperature put forward at present and the analysis of the structural damage from fire,the generalities of mechanics performance and deformation of full-scale RC beams under elevated temperature are discussed in this paper by means of finite element method.The results of numerical calculation and those of experiment coincide well.The characteristics of concrete members under elevated temperature have been studied.Results show that the generalities of mechanics performance and deformation of full-scale RC beams under elevated temperature are greatly influenced by heating time and reinforced ratio,which is significant for civil engineering.