An analysis of available experimental results has indicated that a single phenomenological equation may be used to describe the undrained stress-strain-time behavior of clays under axisymmetric loading conditions. The basic equation is not restricted in scope and application to any particular ranges of stress, stress rate, strain, strain rate or time, and covers the whole stress-strain-time spectrum. For special cases, the equation reduces to previously proposed relations for undrained creep, stress relaxation, and strain-rate effects in clays. The basic form of the relationship is idealized so that mathematical closed-form solutions may be achieved. Simple hyperbolic equations are proposed to approximate the two required basic stress-strain relations. The rheological properties of clays are shown to greatly influence the results of undrained pressuremeter tests.
|Original language||English (US)|
|Journal||Nor Geotek Inst Publ|
|State||Published - Jan 1 1977|
All Science Journal Classification (ASJC) codes
- Water Science and Technology
- Geotechnical Engineering and Engineering Geology