Motion and Stability of Saturated Soil Systems Under Dynamic Loading
Abstract
Theories of motion and stability of fluid-saturated soils, including the commonly used engineering approach to liquefaction analysis as well as theories based on mechanics of mixtures, are critically examined. Description of motion, development of equations of balance, constitutive relationships as well as development of solution procedures are reviewed. Limitations of various theories, their similarities as well as inconsistencies are identified. Laboratory investigations into dynamic behavior of saturated soils are reviewed. A theory of dynamics of saturated soils is described. It uses a convected coordinate system to describe the motion of soil particles, describing the motion of the fluid as relative to the solid. This theory is an extension of Gibson's theory of non linear soil consolidation to three dimensions and includes inertia effects. Solution procedures, developed for certain specializations of the equations of motion of saturated soils, include analytical, semi-analytical and numerical solution schemes. The finite element is selected as the numerical procedure for approximate solution. Spatial discretization, time domain solution procedures and alternative formulations of field equations through a variational formulation are discussed. Shaking table tests for validation of theoretical concepts, performed on saturated Ottawa sand, included tests on anisotropically as well as isotropically consolidated samples and tests to study the effect of overburden on a soil system subjected to shaking. Harmonic as well as frequency banded random amplitude excitations were used.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 29, 1988
- Accession Number
- ADA200293
Entities
People
- Harpal S. Chohan
- Ranbir S. Sandu
- William E. Wolfe
Organizations
- Ohio State University