Inherent Characteristics of 2D Alluvial Formations Subjected to In-Plane Motion |
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| Authors: | Chuanbin Zhu David Thambiratnam Chaminda Gallage |
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| Institution: | 1. School of Civil Engineering and Built Environment, Queensland University of Technology, Brisbane, Australiachuanbin.zhu@hdr.qut.edu.au;3. School of Civil Engineering and Built Environment, Queensland University of Technology, Brisbane, Australia |
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| Abstract: | ABSTRACTWe investigate the inherent characteristics of 2D basins subjected to vertically propagating P-SV waves using the finite difference approach. The ratio of fundamental frequencies between an inhomogeneous basin (f0) and its equivalent flat layers (fh) is found to be a function of both its outer overall geometry and inner geometric formation. 2D resonance can occur in inhomogeneous basins under certain conditions, and the f0/fh can be used to demarcate deep from shallow basin behaviors. With other conditions remaining the same, changing a basin from homogeneity to inhomogeneity results in a lower f0/fh and makes 2D resonance less likely to occur. |
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| Keywords: | Basin Fundamental frequency 2D resonance P-SV waves Numerical method |
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