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2012, Volume 6, Issue 4

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Frontiers of Structural and Civil Engineering >> 2012, Volume 6, Issue 4 doi: 10.1007/s11709-012-0180-8

Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China

Available online: 2012-12-05
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Abstract

An isolated structure often possesses distinct non-proportional damping characteristics. However, traditional seismic calculation theory and methods are derived based on the assumption that damping is proportional. Based on this drawback, a new, more efficient stochastic calculation method, an improvement on the pseudo-excitation method, is introduced. This method is then applied to the seismic analysis of an isolated structure. By comparing it with the forced decoupling, matrix inversion and iteration methods, it is shown that the presented method can produce accurate results while increasing the efficiency of the stochastic analysis. Moreover, the calculation process of the seismic response of an isolated structure is convergent. Based on the results of the example presented in this paper, the given method is applicable to the seismic analysis of an isolated structure and can be utilized in practice.

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