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Earthquakes and Structures
  Volume 12, Number 4, April 2017, pages 389-395

Modification of ground motions using wavelet transform and VPS algorithm
A. Kaveh and V.R. Mahdavi

    In this paper a simple approach is presented for spectral matching of ground motions utilizing the wavelet transform and a recently developed metaheuristic optimization technique. For this purpose, wavelet transform is used to decompose the original ground motions to several levels, where each level covers a special range of frequency, and then each level is multiplied by a variable. Subsequently, the vibrating particles system (VPS) algorithm is employed to calculate the variables such that the error between the response and target spectra is minimized. The application of the proposed method is illustrated through modifying 12 sets of ground motions. The results achieved by this method demonstrate its capability in solving the problem. The outcomes of the VPS algorithm are compared to those of the standard colliding bodies optimization (CBO) to illustrate the importance of the enhancement of the algorithm.
Key Words
    spectrum-compatible ground motions; wavelet transform; response spectrum; vibrating particles system algorithm
Centre of Excellence for Fundamental Studies in Structural Engineering, Iran University of Science and Technology,
Narmak, Tehran, P.O. Box 16846-13114, Iran

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