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Nonlinear ground response: effective stress analyses and parametric studies

Lookup NU author(s): Dr Gaetano EliaORCiD



A comprehensive constitutive model developed for natural structured soils (MSS) is used to investigate the influence of the constitutive assumption on the one-dimensional ground response. The model has been implemented into a two phase dynamic FE software (SWANDYNE II) in order to conduct seismic analyses of a soil column subjected to a typical Italian earthquake at the bedrock. The results of these fully nonlinear analyses are compared with the predictions of the program EERA, a code similar to SHAKE. The close agreement between the results of these two different approaches shows a good performance of the fully nonlinear FEM relative to that of an equivalent linear model. At the same time, important features of the dynamic behaviour of soils, such as the build of excess pore pressure and the development of plastic strain during and after the seismic loading, can only be modelled by a fully coupled nonlinear approach.

Publication metadata

Author(s): Elia G, Amorosi A, Chan AHC

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: Japan-Europe Seismic Risk Workshop

Year of Conference: 2004

Date deposited: 20/01/2010