Near-field horizontal and vertical earthquake ground motions |
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| Authors: | N N Ambraseys J Douglas |
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| Institution: | Department of Civil and Environmental Engineering, Imperial College of Science, Technology and Medicine, London SW7 2BU, UK |
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| Abstract: | Strong-motion attenuation relationships are presented for peak ground acceleration, spectral acceleration, energy density, maximum absolute input energy for horizontal and vertical directions and for the ratio of vertical to horizontal of these ground motion parameters. These equations were derived using a worldwide dataset of 186 strong-motion records recorded with 15 km of the surface projection of earthquakes between Ms=5.8 and 7.8. The effect of local site conditions and focal mechanism is included in some of these equations. |
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| Keywords: | Earthquake ground motions Peak ground acceleration Response spectra Vertical to horizontal ratios |
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