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基于钢筋混凝土结构的破坏原理 ,钢筋的作用力远大于混凝土裂纹端部的粘聚力作用 ,提出基体裂纹处存在与其相垂直的强化筋力学分析模型 ,采用断裂力学的分析方法 ,按筋相对于裂纹尖端距离的远近分两种情况研究 :一种情况是当筋位于裂纹端部时 ,进行筋与基体裂纹附近介质之间的作用力分析 ;第二种情况是当非线性材料筋距离裂纹尖点比较远时 ,考虑筋桥接裂纹处与基体间存在脱粘段的存在 ,分析其筋的受力和变形等各量与载荷以及脱粘筋段长度之间的量化关系
Based on the failure principle of reinforced concrete structure, the force of reinforcing steel is much larger than the cohesive force of the concrete crack tip. The mechanical analysis model of the reinforced concrete with the perpendicular to the crack is proposed. Using the method of fracture mechanics, Crack tip distance is divided into two cases: one is when the tendons are located at the crack tip, the reinforcement and the substrate near the crack between the medium force analysis; the second case is when the nonlinear material from the crack tip When the point is relatively far away, the existence of the debonding section between the cracks and the matrix of the bridge is considered, and the quantitative relationship between the load and the load and the length of the debonding tendons is analyzed.