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在混凝土坝内设置了输水钢管道后,往往产生显著的温度应力,在某些情况下甚至达到很大的数值,必须进行仔细的分析,做出妥当的设计。坝内钢管道周围的温度场和温度应力的分析是一个复杂的问题,一般须应用有限单元法计算。但对于圆形的孔口和管道,则可以近似按轴对称问题作理论分析。如图1所示,钢管内径为Υ_s,外径为R,外包混凝土的内切圆半径为Υ_b,我们就按带有钢板衬砌的厚圓筒
The setting of water-carrying steel pipes in concrete dams often leads to significant temperature stresses, and in some cases even very large values, which must be carefully analyzed and properly designed. The analysis of the temperature field and temperature stress around the steel pipe in the dam is a complicated problem, which is usually calculated by the finite element method. However, for circular orifices and ducts, the theoretical analysis of axisymmetric problems can be approximated. Shown in Figure 1, the inner diameter of pipe Y_s, outer diameter R, the radius of the inscribed circle of concrete outsourcing Y_b, we will press the thick cylinder with steel lining