Seismic Time History and Non-Linear Analysis of Large-Scale Power House Structure

Abstract eng:
The previous dynamic analysis about the hydropower station structure regarded the real structure as the elastic structure. In such case, response spectrum method is usually applied on the analysis of dynamic response; In fact, cracks can be produced in the structure under a low tensile stress, since the materials of structure in practice are in the state of elastic-plasticity. In this paper, the performance of anti-seism of a large-scale hydropower station is studied with time history method, coupling with the influence of the nonlinearity of material. It can be concluded from the comparison of the linear and non-linear results that using the elastic analysis method and the elastic-plastic one can yield considerable different results. The elastic-plastic analysis method has a more distinct influence on the dynamic response of structure than that of the elastic one. It can shows the location, appearing time, and the failure behavior of the cracks with the elastic-plastic analysis method; and the time history method can depict the whole process of the variation of the dynamic response of the structure with time.

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