摘   要：针对一组聚乙烯醇纤维体积掺量为1%的高韧性水泥基复合材料ECC配合比，进行了单轴拉伸、轴心抗压和四点弯曲试验。根据单轴拉伸、轴心抗压试验应力-应变曲线，基于LS-DYNA 拉/压弹塑性材料模型定义了ECC材料的本构关系并进行了弯曲试验的模拟。结果表明，ECC试块相对于普通混凝土试块表现出较高的延性特征，并给出了基于ECC试块工程应力-应变曲线和LS-DYNA拉/压弹塑性材料模型合理定义ECC材料本构关系的有限元方案。

Abstract: For a mix ratio of Engineered Cementitious Composite (ECC), the volume content of Polyvinyl Alcohol (PVA) fiber was set as 1%. A set of experiments including uniaxial tension, axial compression and four point bending tests were conducted based on the mix ratio. The stress strain curves are obtained by uniaxial tension and axial compression tests. Based on *MAT_PLASTICITY_ COMPRESSION_TENSION model in LS-DYNA and the stress strain curves, constitutive model of ECC was defined and used to simulated the bending tests. The results show that ECC specimen exhibit a higher ductility than the ordinary concrete specimens. Moreover, a suggestion is proposed to define the ECC constitutive model based on the engineering stress strain curve and the material model in LS-DYNA.