本文在总结国内外碾压混凝土拱坝诱导缝设置情况的基础上，提出了一种新的诱导缝形式，并结合这种诱导缝形式，利用等效断裂非线性分析方法研究了诱导缝结构分析模型，得到了一些参数对诱导缝典型结构开裂影响规律。最后，对碾压混凝土拱坝诱导缝的设置及其控制作用进行了计算分析研究，得到了一些有意义的结论和结果。以上的计算工作都是采用自编的基于非线性断裂力学中钝裂纹带模型和三线型拉应变软化曲线的结构分析程序ＲＣＣＳＡＰ进行的。 Based on the summary of the setting of induced joints in RCC arch dam at home and abroad, a new type of induced joints is proposed. Combined with this form of induced joints, the nonlinear analysis of equivalent fractures is used to study the structure of induced joints. Model, the influence of some parameters on the cracking of the typical structure of induced joints was obtained. Finally, the calculation and analysis of the induced gap and the control action of the RCC arch dam are carried out, and some meaningful conclusions and results are obtained. The above calculations are based on a self-developed structural analysis program RCCSAP based on the blunt crack band model in nonlinear fracture mechanics and the three-wire tensile strain softening curve.