Three-Dimensional Nonlinear Soil Response Methods Based on a Three-Component Input Wave Field
Publication: International Journal of Geomechanics
Volume 16, Issue 1
Abstract
In a previous study, three-dimensional (3D) linear and simplified nonlinear finite-element soil response methods based on a horizontal-component input seismic wave field were proposed. A seismic wave field means seismic waves propagating in a 3D medium. The method had been developed with the goal of adequately treating short-period (less than a few seconds) seismic surface waves trapped by a deep (several km) underground structure in a shallow soil model. In the present study, along with improvements of the methods, 3D linear and simplified nonlinear soil response methods based on a three-component input seismic wave field are developed, and are applied to estimate seismic soil responses in the three geotechnical zones (the reclaimed, alluvial, and hill zones) of Tokyo during two large earthquakes. The more reasonable soil responses revealed that, in a practical sense, vertical ground motions affected soil responses very little. They also clarified large effects of liquefaction in the reclaimed zone and inferred no large ground failure in the alluvial and hill zones.
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Acknowledgments
Most of the accelerograms were provided as the data set of Strong Motion Array Observation, No. 2 by the Association for Earthquake Disaster Prevention of Japan (1995). Parts of the accelerograms recorded at the Echujima, Ohji, Kitaaoyama, and Sakashita stations were directly supplied by Shimizu, Kajima, Hazama, and Fujita Corporarions of Japan, respectively. One anonymous reviewer greatly improved the manuscript.
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© 2015 American Society of Civil Engineers.
History
Received: Jun 8, 2014
Accepted: Dec 8, 2014
Published online: May 13, 2015
Discussion open until: Oct 13, 2015
Published in print: Feb 1, 2016
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