A model for nonlinear total stress analysis with consistent stiffness and damping variation

Type of content
Conference Contributions - Published
Publisher's DOI/URI
Thesis discipline
Degree name
Publisher
University of Canterbury. Civil and Natural Resources Engineering
Journal Title
Journal ISSN
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Language
Date
2012
Authors
Arefi, M.J.
Cubrinovski, M.
Bradley, Brendon
Abstract

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.

Description
Paper 3408
Citation
Arefi, 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.
Keywords
masing rule, hyperbolic equation, material damping
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
Fields of Research::40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
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