A model for nonlinear total stress analysis with consistent stiffness and damping variation (2012)
Type of ContentConference Contributions - Published
PublisherUniversity of Canterbury. Civil and Natural Resources Engineering
AuthorsArefi, M.J., Cubrinovski, M., Bradley, B.A.show all
The paper discusses modelling of cyclic stress-strain behaviour of soil, in particular a simple model that can produce a desired stiffness and hysteretic damping for a given strain level as observed in laboratory testing is formulated. The unloading-reloading relationship is developed for total stress seismic site response analysis with appropriate damping at large strain. The constitutive model employs a hyperbolic equation as the backbone curve, and uses a modification of the extended Masing unloading-reloading relationship leading to correct measured modulus reduction and damping curves simultaneously. A quasi-static cyclic loading of increasing amplitude is used to demonstrate the model’s performance and its capability to allow improved modelling of the magnitude of energy dissipation based on an experimental program on native sandy soils from Christchurch, New Zealand.
CitationArefi, M.J., Cubrinovski, M., Bradley, B.A. (2012) A model for nonlinear total stress analysis with consistent stiffness and damping variation. Lisbon, Portugal: 15th World Congress on Earthquake Engineering (15WCEE), 24-28 Sep 2012.
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