An improved energy‐based approach for selecting pulse‐like ground motions |
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| Authors: | Zhiwang Chang Xiaodan Sun Changhai Zhai John X Zhao Lili Xie |
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| Affiliation: | 1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education of the P.R. China, School of Civil Engineering, Southwest Jiaotong University, Chengdu, China;2. School of Civil Engineering, Harbin Institute of Technology, Harbin, China;3. GNS Science, Lower Hutt, New Zealand;4. Institute of Engineering Mechanics, China Earthquake Administration, Harbin, China |
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| Abstract: | This study proposes an improved energy‐based approach for quantitative classification of velocity‐pulse‐like ground motions. The pulse amplitude is determined, in its value and in time location, by the amplitude of the half‐cycle pulse having the largest seismic energy. After conducting statistical analyses, a newly‐determined threshold level for selecting pulse‐like ground motions is derived; and then what followed is a comparison analysis of three pulse‐detecting schemes, one using the wavelet analysis, the other two using the energy concept. It is believed that other than providing a useful way of classifying pulse‐like ground motions for structural demand analysis, knowledge of this work could also benefit the development of the ground motion prediction equations accounting for pulse effects, and further to aid the probabilistic seismic hazard analysis in a near‐fault environment. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | near‐fault pulse‐like ground motion selection velocity time history |
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