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本文主要研究钢筋混凝土轴心受拉和受弯等构件中两根主生裂缝之间的钢筋与混凝土的结合(过去常称为粘结或握裹)与滑移关系。提出了一种较简单的结合应力分布的计算模式,能据以计算裂缝间区段中各点的应变、应力、滑移,结合应力与滑移的关系,以及截面的刚度和裂缝的宽度等。又作了轴对称的有限元分析,能估算次生裂缝出现时的荷载以及次生裂缝出现后的端部滑移。本文所得结果可供钢筋混凝土构件的裂缝和刚度计算以及在应用有限元法进行钢筋混凝土结构的非线性分析时参考。
This paper mainly studies the relationship between the reinforcement and concrete bonding (usually called bonding or gripping) between two primary cracks in the axial tension and bending of reinforced concrete. A simple calculation model for the combined stress distribution is proposed. It can calculate the strain, stress, slip at each point in the inter-fracture section, the relationship between the combined stress and slip, and the rigidity of the cross-section and the width of the crack. . An axisymmetric finite element analysis was also performed to estimate the load at the occurrence of secondary cracks and the end slip after the occurrence of secondary cracks. The results obtained in this paper can be used to calculate the cracks and stiffness of reinforced concrete members and to use the finite element method for nonlinear analysis of reinforced concrete structures.