【摘要】 基于复合材料力学性能的复合定律，将钢纤维增强SCLC的本构模型定义为基准SCLC的应力-应变关系与钢纤维增强效应的加权，建立了一种以应变和钢纤维掺量为自变量的钢纤维增强SCLC本构方程，其中SCLC应力-应变关系曲线上升段和下降段分别采用Weibull分布模型和有理分式拟合试验结果得出，以钢纤维增强系数考虑钢纤维的增强效应.利用有限元软件ABAQUS模拟钢纤维增强SCLC棱柱体单轴受压试验，采用上述本构方程，计算钢纤维增强SCLC损伤模型的损伤因子，分析对比得出有限元模拟结果与试验结果吻合，说明上述本构方程可以较好地描述钢纤维增强SCLC应力-应变关系，为钢纤维增强SCLC结构非线性分析提供理论依据.更多还原

【Abstract】 The constitutive model of steel fiber reinforced SCLC is defined as the weighting of the stress-strain relationship of the benchmark SCLC and the reinforcement effect of steel fiber based on the composite law of mechanical characteristics of composite materials. The steel fiber reinforced SCLC constitutive equation, in which the Weibull distribution model and the rational fraction fitting test are used to obtain the ascending and descending sections of the SCLC stress-strain relationship curve, respectively, and the steel fiber reinforcement effect is taken into account by the steel fiber reinforcement coefficient.The uniaxial compression test of the steel fiber reinforced SCLC prism was simulated using the finite element program ABAQUS, and the damage factor of the steel fiber reinforced SCLC damage model was calculated using the aforesaid constitutive equation. The constitutive equation accurately describes the stress-strain relationship of steel fiber reinforced SCLC structures and serves as a theoretical foundation for nonlinear analysis of these structures.更多还原