采用再生骨料配制再生骨料混凝土(RAC),研究其力学性能,特别是单轴受压应力-应变性能.通过改变再生骨料的取代量,研究再生骨料对RAC力学性能的影响.研究结果表明:随着再生骨料取代率的增加,RAC的强度会略有降低;RAC的单轴受压应力-应变曲线与普通混凝土相近,随着再生骨料取代量的增加,RAC的延展性得到提高;采用数值计算模型和损伤模型构造RAC的本构关系,回归曲线与实测单轴受压应力-应变曲线的吻合较好,特别是数值模型,基本上能够真实地再现应力-应变曲线,可用于混凝土结构的计算分析. The recycled aggregate concrete (RAC) was prepared by using recycled aggregate to study its mechanical properties, especially the uniaxial compressive stress-strain behavior.The effect of recycled aggregate on the mechanical properties of RAC was studied by changing the amount of recycled aggregates The results show that the strength of RAC decreases slightly with the replacement of recycled aggregates. The uniaxial compressive stress-strain curves of RAC are similar to that of ordinary concrete. With the increase of the amount of recycled aggregates, the ductility of RAC The constitutive relation of RAC is constructed by using numerical calculation model and damage model. The regression curve is in good agreement with the measured uniaxial compressive stress-strain curve. Especially the numerical model can basically reproduce the stress-strain curve, Can be used for calculation and analysis of concrete structures.