基于ABAQUS的钢-聚丙烯混杂纤维混凝土损伤塑性本构模型取值方法研究

该文基于ABAQUS有限元软件中的混凝土损伤塑性模型（CDPM），研究钢-聚丙烯混杂纤维混凝土的CDPM本构参数的取值方法，包括屈服面函数、塑性势能函数中参数的确定，以及单轴应力-应变关系的定义，并分析不同CDPM本构参数对数值结果的影响。通过对纤维混凝土材料的典型多轴加载力学行为以及混杂纤维混凝土柱构件的抗震性能进行了数值模拟并与文献试验结果进行对比，验证该取值方法的合理性及适用性。结果表明，采用CDPM并选择适当的本构参数能够准确地描述钢-聚丙烯混杂纤维混凝土的非线性力学行为，该方法能够为纤维混凝土结构在复杂荷载状态下的精细化设计与分析提供参考。

CALIBRATION METHOD OF DAMAGE PLASTICITY MODEL FOR STEEL-POLYPROPYLENE HYBRID FIBER REINFORCED CONCRETE BASED ON ABAQUS

It deals with the calibration method of concrete damage plasticity model (CDPM) applicable for steel-polypropylene hybrid fiber reinforced concrete (HFRC) based on ABAQUS FE software. The calibration includes the determination of parameters in yield criterion and plastic potential function, as well as the definition of uniaxial stress-strain relations. The influences of respective CDPM parameters on the simulation results are discussed. The applicability of the proposed calibration method is validated by typical comparisons between the simulation output and experimental data from literature, where the mechanical behavior of FRC materials under multiaxial loadings and seismic performance of HFRC column subjected to reverse loadings are simulated. It is shown that the CDPM with appropriate constitutive parameters can provide accurate estimation of the nonlinear behavior of HFRC, and the developed approach can serve as a reference for precise design and analysis of HFRC structural performance under complex loadings.