Modelling the behavior of overconsolidated clays | |
| Author | Pornpong Asavadorndeja |
| Call Number | AIT Thesis no. GE-00-20 |
| Subject(s) | Strains and stresses Clay--Testing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-00-20 |
| Abstract | The Cambridge stress-strain soil theories are originally developed only for normally consolidated clays. Therefore, they are not suitable in the case of overconsolidated clays, when their states lie below the state bounda1y surface. PENDER (1978) established a non-associated flow rule to develop plastic dilatancy ratio in the overconsolidated state and also plastic volumetric strains on both lightly and heavily over-consolidated states. Extensive experimental studies have been carried out at the AIT in a comprehensive manner, following on controlled shearing paths of overconsolidated clays. These studies now span for a period of over ten years and are intended to capture the stress-strain behavior both under compression and extension conditions. These studies are used to refine the predictions of the plastic dilatancy ratio, and also to formulate the plastic volumetric strain in the drained condition and the plastic shear strain in the undrained condition. An incremental stress-strain approach, similar to ROSCOE and POOROOSHASB (1963), was adopted for the prediction of strains in the drained test. Predictions based on ROSCOE and POOROOSHASB (1963) approach in the form of contours are compared with experimental data. Attempts were made to map the strain circle from constant magnitude of stress contours in various directions ranging from 0 to 360°. A similar mapping is done for the stress circle for constant values of radially eminent strain contours from the isotropic and anisotropic states. These give a features, which can refine the present stress-strain models below the state boundary surface. |
| Year | 2001 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-00-20 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Balasubramaniam, A.S.; |
| Examination Committee(s) | Bergado, D.T.;Miura, .Kinya; |
| Scholarship Donor(s) | Asian Institute of Technology (Partial Scholarship); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2001 |