Scattering and diffraction of earthquake motions in irregular elastic layers,I: Love and SH waves |
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| Institution: | 1. Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089-2531, USA;2. Canadian Nuclear Safety Commission, Ottawa, Ontario Canada, K1P 5S9;1. Department of Mathematics and Statistics, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus;2. Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, UK;3. Department of Mathematics, Faculty of Mathematics and Computer Science, University of Bucharest, 14 Academiei, 010014 Bucharest, Romania;4. Institute of Solid Mechanics, Romanian Academy, 15 Constantin Mille, 010141 Bucharest, Romania;1. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN), Russian Academy of Sciences, Troitsk Town, Moscow 142190, Russia;2. The University of Electro-Communications (UEC), Advanced Wireless Communications Research Center (AWCC), 1-5-1 Chofugaoka, Chofu Tokyo 182-8585, Japan;1. Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843, USA;2. Department of Atmospheric Sciences, Texas A&M University, College Station, TX 77843, USA;1. School of Geosciences, China University of Petroleum (East China), Qingdao, China;2. Xinjiang Oilfield Company, CNPC, Karamay, China |
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| Abstract: | We describe the wave propagation through an irregularly layered, elastic medium for incoming body (SH) and surface (Love) waves. As a result of irregular geometry, each layer generates additional waves by scattering and diffraction. These additional waves modify the input motions and locally may lead to larger motions and concentrations of stresses, strains, and rotations on or below the ground surface. For engineering design, and in particular for analyses of soil-structure interaction, it is important to understand the nature and the consequences of such motions.The scattering and diffraction of Love and SH waves by irregular layers will be investigated by the weighted-residuals method. The scattered and diffracted mode shapes and spectral amplification characteristics at different frequencies will be examined and discussed. |
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