An Ensemble of Ground Motions Simulation Based on Discrete Stationary Wavelet Transform

• Published in: Applied Mechanics and Materials Vol. 166-169; pp. 2408 - 2411
• Main Authors: Jin, Sheng Ji, Bao, Wen Bo, Zhang, Da Sheng, Fu, Liang Hua, Bai, Quan
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.05.2012
• Subjects: Discrete Stationary Wavelet Transform; Stochastic Process; Non-Stationary Characteristics; Ground Motion Simulation
• ISBN: 9783037854211; 3037854219
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.166-169.2408

Simulation of earthquake ground motion was a hot topic for structure seismic response analysis. According to the problems in simulating ground motion history with harmony superposition method, such as more interference of human factors and simulated ground motion history didn’t have frequency non-stationary characteristic, a novel method of ground motion simulation based on stationary discrete wavelet transform was presented. Using stationary discrete wavelet transform, the parent ground motion history was decomposed into different frequency bands, and the coefficients were modified. Using inverse stationary discrete wavelet transform, an ensemble of ground motions were simulated whose statistics closely resemble those of the parent history. Through a numerical example, the statistic characteristics of simulated histories were compared with the original values, and the feasibility and correctness of presented method was illustrated.