Development for twin shear damage constitutive model of concrete

The concrete material constitutive model has limitations at present stage. Mazars concrete damage equation obtained by uniaxial test was extended to the triaxial state based on Yu Maohong Twin Shear constitutive model and the concept of damage plane. Material stiffness damage degradation impact on the yield process of concrete yield plane was considered. This article developed a concrete Twin Shear damage constitutive model in FLAC(3D) environment. The model is simple and easy to practical engineering applications, and the model has high accuracy. Thereby, this paper tries to explore a new damage constitutive model for concrete.