Elasto-plastic analysis of soft clay behavior | |
| Author | Suched Likitlersuang |
| Call Number | AIT Thesis no. GE-99-15 |
| Subject(s) | Clay--Thailand--Bangkok--Testing Strains and stresses |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-99-15 |
| Abstract | Most of the clays in Southeast Asia including the Bangkok Clay are in a lightly over-consolidated state. The Cambridge stress-strain soil theories 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 boundary 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 Asian Institute of Technology 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 behaviour 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 PENDER's model in the form of contours are compared with experimental data. Attempts were made to map the strain contours from constraint magnitude of stress contours in various directions ranging from 0 to 360°. A similar mapping is done for the stress contours for constant values of radically eminent strain contours from the isotropic and anisotropic states. These findings seem to give unique features, which can refine the present stress-strain models below the state boundary swface. |
| Year | 2000 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-99-15 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Balasubramaniam, A.S.; |
| Examination Committee(s) | Seah, Tian Ho;Miura, Kinya; |
| Scholarship Donor(s) | Goverment of Japan; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2000 |