A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Anisotropic Undrained Shear Strength Parameters for Nonlinear Deformation Analyses of Embankment Dams
Nonlinear seismic deformation analyses (NDAs) of dams often require estimating undrained shear strengths for compacted embankment soils. These soils can range broadly in their grain size distributions, fines contents, and fines plasticity characteristics. Their shear strengths are often estimated based on results of isotropically consolidated undrained triaxial tests with adjustments to account for the anisotropic consolidation conditions in the field. The most common method for estimating anisotropic undrained shear strengths for use in limit equilibrium analyses of slope stability generally involve interpolating between the drained shear strength envelope and the isotropic undrained shear strength envelope using the stress conditions on the failure plane at the time of consolidation. While this method appears to work well for limit equilibrium analyses, its use in NDAs is complicated because a failure surface is not predefined. An extension of this method for use in NDAs is presented, including examination of alternative measures of consolidation stresses for interpolation of undrained shear strengths. An example of using these methods in a numerical analysis of an embankment dam is presented, and issues regarding their implementation in NDAs are discussed.
Anisotropic Undrained Shear Strength Parameters for Nonlinear Deformation Analyses of Embankment Dams
Nonlinear seismic deformation analyses (NDAs) of dams often require estimating undrained shear strengths for compacted embankment soils. These soils can range broadly in their grain size distributions, fines contents, and fines plasticity characteristics. Their shear strengths are often estimated based on results of isotropically consolidated undrained triaxial tests with adjustments to account for the anisotropic consolidation conditions in the field. The most common method for estimating anisotropic undrained shear strengths for use in limit equilibrium analyses of slope stability generally involve interpolating between the drained shear strength envelope and the isotropic undrained shear strength envelope using the stress conditions on the failure plane at the time of consolidation. While this method appears to work well for limit equilibrium analyses, its use in NDAs is complicated because a failure surface is not predefined. An extension of this method for use in NDAs is presented, including examination of alternative measures of consolidation stresses for interpolation of undrained shear strengths. An example of using these methods in a numerical analysis of an embankment dam is presented, and issues regarding their implementation in NDAs are discussed.
Anisotropic Undrained Shear Strength Parameters for Nonlinear Deformation Analyses of Embankment Dams
Montgomery, Jack (author) / Boulanger, Ross W. (author) / Armstrong, Richard J. (author) / Malvick, Erik J. (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 1294-1306
2014-02-24
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2014
Nonlinear Deformation Analyses of Liquefaction Effects on Embankment Dams
| British Library Conference Proceedings | 2015
Reliability of Undrained Shear Strength and the Optimum Embankment Design Method
| British Library Conference Proceedings | 2007
Liquefaction Analyses for Embankment Dams
| British Library Conference Proceedings | 1987
Evolution of Undrained Strength Under a Test Embankment
| TIBKAT | 2021