Genetic algorithm-finite element method (GA-FEM) is applied to the study of tectonic stress field of part of East Asia area. From the observed stress distribution, 2-D elastic plane stress inversion is made to deduce the boundary forces and investigate controlling factors. It is suggested that the continent-continent collision is the dominant factor controlling the Chinese tectonic stress field. The ocean-continent convergence along the subduction zone is an important factor. There exists tensile boundary force along tve marginal sea.Key words: genetic algorithm-finite element method (GA-FEM) tectonic stress field dynamic genetic algorithm inversion of finite element method •

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Abstract--In situ stress measurements are one of the important methods for studying the recent tectonic stress field and stress state. In this paper, the stress state and variation of stresses with depth in Mainland China are presented and analyzed on the basis of in situ stress data measured by both hydrofracturing and overcoring techniques.