bolt flange joints under axial tensile stress in the course of the internal pressure increases due gasket compressive stress occurs on the relaxation and basic support and stability;
法兰接头中螺栓受到轴向拉应力在加内压过程中由于密封垫片上的压紧应力发生松弛而基本持稳定;
on the basis of distribution of stresses, it can determine that dam radial displacement is a main factor of axial tensile stress and is less important factor of loop tensile stress.
根据应力的大小分布可以确定,坝体变形是背管产生较大轴向拉应力的主要因素,是产生环向拉应力的次要因素;
thereby, dam deformation and inner water pressure of the penstock are main factors to cause axial tensile stress and circumferential tensile stress respectively.
因此,坝体变位和管内内水压力分别是背管产生轴向拉应力和环向拉应力的主要因素。