混凝土应力-应变关系是混凝土构件承载力、变形分析及裂缝研究的重要参数.本文设计制作了配筋混凝土试件开展配筋混凝土试件轴向拉伸试验,通过分离钢筋与混凝土分别承受的荷载,获得不同配筋率下的混凝土轴向拉伸应力-应变关系曲线,分段拟合得到对应的应力-应变曲线方程,并探讨了配筋率对混凝土轴向拉伸应力-应变关系曲线的影响规律. The stress-strain relationship of concrete is an important parameter to study the bearing capacity, deformation analysis and fracture research of concrete members.This paper designed and manufactured reinforced concrete specimens to carry out the axial tensile test of reinforced concrete specimens by separating the load , The stress-strain curves of concrete under different reinforcement ratios were obtained and the corresponding stress-strain curve equations were obtained by piecewise fitting. The relationship between the ratio of reinforcement and the axial tensile stress-strain curve of concrete Affect the law.