结合非连续变形分析方法 ,提出了一种研究节理岩体热应力问题的等效初应力方法。该方法将温度变化对岩体的力学影响转化为等效初应力的作用来求解节理岩体热应力问题 ,给出了平面应力和平面应变问题中等效初应力和等效载荷矩阵的计算公式。算例表明该方法是有效的 Combined with the method of discontinuous deformation analysis, an equivalent initial stress method to study the thermal stress of jointed rock mass is proposed. The method solves the problem of thermal stress of jointed rock mass by transforming the mechanical influence of temperature on rock mass mechanics into equivalent initial stress, and gives the formulas of equivalent initial stress and equivalent load matrix in plane stress and plane strain problems. The example shows that this method is effective