在ＭＴＳ公司８１５０２型电液伺服系统上，完成了围压由０～４０ＭＰａ范围内混凝土受压试验，发现随着围压的增大，应力应变全曲线的峰值应力与峰值应变均有所提高，但弹性模量基本不变在此基础上，根据等效应变假定和内变量理论，建立了考虑不可逆应变影响的弹塑性损伤本构模型只要计及峰值应力和峰值应变的变化，该模型可以统一地描述不同围压下混凝土的力学性能 In the MTS company’s Model 81502 electro-hydraulic servo system, confining pressure was tested in the range of 0-40 MPa, and it was found that with the confining pressure increasing, both the peak stress and the peak strain of the stress-strain curve The elastic modulus is basically unchanged. Based on this, based on the equivalent strain assumption and the internal variable theory, an elastoplastic damage constitutive model considering the irreversible strain effect is established as long as the peak stress and the peak strain are taken into account. This model can uniformly describe the mechanical properties of concrete under different confining pressures.