Dissipated energy in undrained cyclic triaxial tests
File(s)
Accepted version
Author(s)
Azeiteiro, RJN
Coelho, PALF
Taborda, DMG
Grazina, JC
Type
Conference Paper
Abstract
Energy-based methods are an emerging tool for the evaluation of liquefaction potential. These
methods relate excess pore water pressure build-up to seismic energy dissipated per unit volume.
Further development of these methods require their validation through laboratory testing. In this
paper, a comprehensive study of energy dissipated during cyclic triaxial tests is undertaken. Results
of undrained cyclic triaxial tests performed on air-pluviated samples of Hostun sand prepared with
different initial densities and subjected to several confining pressures and loading amplitudes are
presented. The energy dissipated per unit volume is estimated from the experimental results and
correlated to the generated excess pore water pressure. The correlation between those quantities
appear to be independent of the initial relative density of the sample, isotropic consolidation pressure
and cyclic stress ratio used in the tests. Moreover, the relationship between observed doubleamplitude
axial strain and the energy dissipated per unit volume is examined. It is found that this
relationship is greatly dependent on the relative density of the sample.
methods relate excess pore water pressure build-up to seismic energy dissipated per unit volume.
Further development of these methods require their validation through laboratory testing. In this
paper, a comprehensive study of energy dissipated during cyclic triaxial tests is undertaken. Results
of undrained cyclic triaxial tests performed on air-pluviated samples of Hostun sand prepared with
different initial densities and subjected to several confining pressures and loading amplitudes are
presented. The energy dissipated per unit volume is estimated from the experimental results and
correlated to the generated excess pore water pressure. The correlation between those quantities
appear to be independent of the initial relative density of the sample, isotropic consolidation pressure
and cyclic stress ratio used in the tests. Moreover, the relationship between observed doubleamplitude
axial strain and the energy dissipated per unit volume is examined. It is found that this
relationship is greatly dependent on the relative density of the sample.
Date Issued
2015-11-04
Date Acceptance
2015-11-04
Citation
2015
Copyright Statement
© 2015 The Authors
Source
6th International Conference on Earthquake Geotechnical Engineering
Publication Status
Published
Finish Date
2015-11-04
Coverage Spatial
Christchurch, New Zealand