Nonlinear numerical method for earthquake site response analysis I — elastoplastic cyclic model and parameter identification strategy |
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| Authors: | Fernando Lopez-Caballero Arezou Modaressi-Farahmand Razavi Hormoz Modaressi |
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| Institution: | (1) Laboratoire MSS-Mat CNRS UMR 8579, Ecole Centrale Paris, Grande Voie des Vignes, 92295 Chatenay-Malabry Cedex, France;(2) Development Planning and Natural Risks Department, BRGM, BP 6009, 45060 Orléans Cedex 2, France |
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| Abstract: | This paper, along with its companion paper, presents the importance of the adequate soil behaviour model to simulate earthquake
site response analysis. An elastoplastic model taking into account the elementary necessary plastic mechanisms such as progressive
friction mobilization, Coulomb type failure, critical state and dilatancy/contractance flow rule, is used. However, one of
the obstacles in the use of elastoplastic models in the everyday design processes for evaluation of the seismic soil response
is the difficulty in identifying their parameters. In this paper, a methodology to identify a coherent set of parameters of
the elastoplastic model for a given type of soil is presented. The strategy behind the decision making process proposed here
is based on the use of minimum physical and easily measurable properties of the soil to directly provide or indirectly assess
the required model parameters. |
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| Keywords: | Constitutive model Cyclic loading Elastoplastic Parameter identification Liquefaction |
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