摘   要：通过抗压强度、劈裂抗拉强度、峰值压应变、静态弹性模量和应力-应变关系试验，研究了自密实混凝土强度、再生大骨料强度、再生大骨料粒径对再生大骨料自密实混凝土（RCASCC）力学性能的影响。采用数据拟合的方法对国内外典型混凝土单轴受压应力-应变模型中的相关系数进行了修正，给出了适用于RCASCC的单轴受压本构模型，分别建立了RCASCC抗压强度、劈裂抗拉强度、峰值应变和弹性模量与自密实混凝土强度、再生大骨料强度、再生大骨料粒径的函数关系式，并对4种本构模型的拟合程度进行了比较分析。结果表明：所拟合的三次多项式型曲线和三角函数型曲线与实际应力-应变关系吻合程度相对较高。

Abstract: The effects of the strength of self-compacting concrete, strength of recycled larger size aggregate, size of recycled larger size aggregate on mechanical properties of recycled larger size aggregate self-compacting concrete(RCASCC) were studied through compressive strength, splitting tensile strength, peak compressive strain, elastic modulus and stress-strain relationship tests. The data fitting method was used to correct the correlation coefficients in the typical uniaxial compression stress-strain models of concrete in China and abroad. A uniaxial compression constitutive model for RCASCC was presented. The functional relationship between the compressive strength/splitting tensile strength/peak strain /elastic modulus of RCASCC and the strength of self-compacting concrete, strength of recycled larger size aggregate, size of recycled larger size aggregate was established, and the fitting degree of the four constitutive models was compared and analyzed. The results show that the fitted cubic polynomial curve and trigonometric function curve are in relatively high agreement with the actual stress-strain relationship.