Location
San Diego, California
Presentation Date
30 Mar 2001, 10:30 am - 12:30 pm
Abstract
The geological profile of submerged slopes on the continental shelf typically includes soft cohesive soils with layer thicknesses ranging from a few meters to tens or hundreds of meters. The response of these soils in simple shear tests is largely influenced by the presence of an initial consolidation shear stress, inducing anisotropic stress-strain-strength properties which depend also on the direction of shear. In this paper, a new simplified effective-stress-based model describing the behavior of normally to lightly overconsolidated cohesive soils is used in conjunction with a one-dimensional seismic site response analysis computer code to illustrate the importance of accounting for anisotropy, small strain nonlinearity and pore pressure development. In particular, a simple example is carried out to compare results for level ground conditions and a 10° slope. Depth profiling of the maximum shear strains and permanent deformations provide insight into the mechanisms of deformation during a seismic event, and the effects of sloping ground conditions.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2001 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Biscontin, Giovanna; Pestana, Juan M.; Nadim, Farrokh; and Andersen, Knut, "Seismic Response of Normally Consolidated Cohesive Soils in Gently Inclined Submerged Slopes" (2001). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 21.
https://scholarsmine.mst.edu/icrageesd/04icrageesd/session05/21
Included in
Seismic Response of Normally Consolidated Cohesive Soils in Gently Inclined Submerged Slopes
San Diego, California
The geological profile of submerged slopes on the continental shelf typically includes soft cohesive soils with layer thicknesses ranging from a few meters to tens or hundreds of meters. The response of these soils in simple shear tests is largely influenced by the presence of an initial consolidation shear stress, inducing anisotropic stress-strain-strength properties which depend also on the direction of shear. In this paper, a new simplified effective-stress-based model describing the behavior of normally to lightly overconsolidated cohesive soils is used in conjunction with a one-dimensional seismic site response analysis computer code to illustrate the importance of accounting for anisotropy, small strain nonlinearity and pore pressure development. In particular, a simple example is carried out to compare results for level ground conditions and a 10° slope. Depth profiling of the maximum shear strains and permanent deformations provide insight into the mechanisms of deformation during a seismic event, and the effects of sloping ground conditions.
