Simplified seismic analysis of soil–well–pier system for bridges |
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| Institution: | 1. CoastalVision, LLC, 215 Eustis Avenue, Newport, RI 02840, USA;2. SeaPlan, 89 South Street, Boston, MA 02111, USA;3. The Nature Conservancy, Eastern North America Division, USA;4. University of New Hampshire, Center for Coastal and Ocean Mapping/Joint Hydrographic Center, Jere A. Chase Ocean Engineering Lab, 24 Colovos Road, Durham, NH 03824, USA;5. Maine Coastal Program, 93 State House Station, Augusta, ME 04333, USA;1. Earth Science and Engineering Department, King Abdullah University of Science and Technology (KAUST), Saudi Arabia;2. Geophysics Department, Faculty of Science, Cairo University, Egypt |
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| Abstract: | Seismic analysis of soil–well–pier system was carried out using three different approaches to evaluate their comparative performance and associated complexities. These approaches were (a) two-dimensional nonlinear (2D-NL), (b) two-dimensional equivalent-linear (2D-EqL), and (c) one-dimensional spring–dashpot (1D). Soil was modeled as 2D plane-strain elements in the 2D-NL and 2D-EqL approaches, and as springs and dashpots in the 1D approach. Nonlinear behavior of soil was captured rigorously in the 2D-NL approach and approximately in the remaining two approaches. Results of the two approximate analyses (i.e., 2D-EqL and 1D) were compared with those of the 2D-NL analysis with the objective to assess suitability of approximate analysis for practical purposes. In the 1D approach, several combinations of Novak's and Veletsos' springs were used to come up with a simplified 1D model using three types of spring–dashpots. The proposed model estimates the displacement and force resultants relatively better than the other 1D models available in literature. |
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