• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 19 Issue 6
Dec.  2006
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Article Contents
HU Liang, LI Li, FAN Jian. Proper Orthogonal Decomposition-Based Simulation of Spatially Correlated Seismic Ground Motions[J]. Journal of Southwest Jiaotong University, 2006, 19(6): 685-689,695.
Citation: HU Liang, LI Li, FAN Jian. Proper Orthogonal Decomposition-Based Simulation of Spatially Correlated Seismic Ground Motions[J]. Journal of Southwest Jiaotong University, 2006, 19(6): 685-689,695.

Proper Orthogonal Decomposition-Based Simulation of Spatially Correlated Seismic Ground Motions

  • Received Date: 20 Dec 2005
  • Publish Date: 25 Dec 2006
  • By combining with the modal truncation technique,the simulation formulas for proper orthogonal decomposition(POD) based on the spectral representation method were derived.Then,a stochastic model for the spatial variation of seismic ground motions was proposed,and the simplified simulation formulas were obtained by the pre-decomposition of the spectral matrixes of seismic ground motions.As a result,only evaluation of eigenvectors of a real spectral matrix rather than a complex one is involved,and high computation efficiency can be obtained for the elimination of the time-consuming Cholesky decomposition procedure and the uses of the fast Fourier transform(FFT) technique and the modal truncation technique.Finally,an application of the formulas to the Longtan river long-span bridge was included as a numerical example to verify this method and illustrate the physical sense of POD.

     

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