Estimating inelastic sediment deformation from local site response simulations |
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Authors: | Ronaldo I Borja Wai Ching Sun |
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Institution: | (1) Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA;(2) Present address: Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08541, USA |
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Abstract: | Significant insight into the dynamic local site response of a horizontally layered sediment deposit to seismic excitation
can be gained from numerical simulations. In this paper we use a nonlinear local site response analysis code SPECTRA to estimate
the coseismic sediment deformation at a seismically active site in Lotung, Taiwan. We address some basic issues relevant for
interpreting the simulation results, including the impact of noise and baseline offsets present in the input ground motion.
We also consider the sensitivity of the predicted deformation responses to statistical variations of sediment constitutive
properties. Finally, we apply a suite of hypothetical strong ground motions to the base of the sediment deposit to better
understand the pattern of inelastic deformation likely to result from strong seismic shaking. |
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