有效纤维量和层数分布对SFRC基本力学性能影响研究

Study on the Effect of Effective Fiber Quantity and Layer Number Distribution on the Basic Mechanical Properties of SFRC

为研究层布式钢纤维混凝土中有效纤维量和层数分布对其基本力学性能的影响,通过分析钢纤维混凝土单轴受力破坏机理及钢纤维混凝土中存在无效钢纤维量的合理性,确定了有效纤维量的数学表达方法,并进行了试验验证。在此基础上,确定了层布式钢纤维混凝土中钢纤维的最佳层数"N"的数学模型,"N"与钢纤维的体积掺量Vf成正比、与最佳层面密度ρs成反比。

In order to find out the effect of effective fiber quantity and layer number distribution on the basic mechanical properties of layered steel fiber reinforced concrete, based on the analysis of the failure mechanism of SFRC under uniaxial loading, the rationality of the existence of invalid SFRC is pointed out, the mathematical expression method of the effective SFRC is determined, and its correctness is verified by experiments. On this basis, the mathematical model of the optimum number of layers-"N" is deduced. N is proportional to the volume content Vf and inversely proportional to the Optimum layer density ρs.