SUPERPOSITION OF STRESSES AND COMBINED STRUCTURE

There are two kinds of superposition in the tectonic deformation of the crust, compound superposition and combined superposition. According to the principle of superposition of elastic theory, the tectonic stress field caused by two or more systems of external forces, acting on a block at the same time, equals superposition of the individual tectonic stress-field produced by the action of the forces applied individually. A group of formulas of stress superposition are given, and the superposition of homogeneous and inhomogeneous stress-fields are analysed. The geometric property and features of deformation of combined structures are explained in this paper.     

应力叠加和联合构造

在地壳构造变形中存在两类叠加现象:复合叠加和联合叠加。根据弹性理论的叠加原理,同一地块在两组或两组以上外力同时联合作用下所产生的构造应力场,等于各组外力分别作用所产生的构造应力场的叠加。本文导出应力叠加公式,分析了均匀应力场和非均匀应力场的叠加及其所决定的联合构造型式,解释了弧形联合构造的一系列几何性质和变形特征。