Study of Effects of Sediment-Damping,Impedance Contrast,and Size of Semi-Spherical Basin on the Focusing and Trapping of the Basin-Generated Surface Waves |
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| Authors: | Kamal |
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| Institution: | Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee, India |
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| Abstract: | This article presents the effects of sediment-damping, impedance-contrast (IC), and size of semi-spherical (SS) basin on the focusing and trapping of the basin-generated surface (BGS) waves and the spatial-variation of average-spectral-amplification (ASA), differential ground motion (DGM), and average-aggravation-factor (AAF). A frequency-dependent focusing of the BGS-wave is inferred. Increase of ASA, DGM, and AAF with increase of size of the SS-basin with a fixed-shape-ratio revealed that the BGS-wave focusing has counter-balanced the sediment-damping effects. It is concluded that the BGS-wave focusing and trapping in the SS-basin is more sensitive to change of IC as compared to the similar change of sediment-damping. |
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| Keywords: | 3D Viscoelastic Simulation Basin-Generated Surface Waves Basin-Size Effects Aggravation Factor and Differential Ground Motion |
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