基于ABAQUS高强轻骨料混凝土损伤塑性模型应用研究

Application of plastic-damage model for high-strength lightweight aggregate concrete based on ABAQUS

运用ABAQUS中损伤塑性模型进行轻骨料混凝土的数值分析,选取合适的轻骨料混凝土材料本构曲线,并分析推导了损伤因子计算公式,然后对比本构关系参数模拟结果和所选取轻骨料混凝土本构曲线,验证损伤塑性模型参数选用的正确性。建立钢筋轻骨料混凝土简支梁有限元模型,对钢筋轻骨料混凝土试件进行模拟分析,有限元分析结果与试验数据吻合得较好,验证了本构关系及参数用于结构分析情况下的可靠性。

In the construction of long-span bridges, the high-strength lightweight aggregate concrete has broad application prospects. However, there was less research on the high strength lightweight aggregate concrete by finite element numerical method, thus the use of lightweight aggregate concrete was limited. The plastic -damage model in the ABAQUS was used for the numerical analysis of lightweight aggregate concrete in this paper. The formula of damage factor was derived on the basis of selecting suitable constitutive curves of lightweight aggregate concrete. To prove the validity of the plastic-damage model parameter, the simulation results on calculating pa- rameters and material constitutive curves were compared. The nonlinear finite element analysis models of a beam of reinforced lightweight aggregate concrete was established by using the plastic-damage model, and the results of the finite element analysis were in good agreement with the experiment results. It has been proved that lightweight aggregate concrete constitutive curves and damage factor are valid.