Research and Application of Semi-analytical Finite Plate Strip Method in Stability

With the development of economy, steel structure has been widely applied in construction, meanwhile thin-wall aqueduct has also been widely used in water conservancy project, the stability of the structures is the key point which should be focused on in the process of applications. However, it is still lack of depth research. The semi-analytical finite strip element method is based on traditional finite element method, and has been further improved to determine the critical buckling stress of thin-walled structure. It has been proved as a pretty effective calculation method in solving problems of stability in thin-walled structure by compared with classical solution in the application of the steel structure, and has been applied in the thin-walled aqueduct, it provides a theoretical basis of the future stability analysis of steel structure and the thin-walled aqueduct structure.