Cyclic behavior of soft Bangkok clay for offshore type loading | |
| Author | Fazal, Farooq |
| Call Number | AIT Thesis no.GT-84-12 |
| Subject(s) | Materials--Dynamic testing Clay--Thailand--Bangkok--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 |
| Abstract | Offshore gravity platforms exert enormous forces on the foundation soil, both static forces from the submerged weight of the platform and cyclic forces from wave action on the platform. This thesis concentrates on one important aspect of foundation design of offshore gravity platforms; the behaviour of clay subjected to cyclic loading. A series of dynamic loading tests were carried out on Bangkok Soft Clay employing a cyclic triaxial apparatus. All the specimen were first preconsolidated along the Ko-line, then subjected to cyclic loading with a sinusoidal wave of 0.10 Hz follower by static loading to failure. Prior to cyclic loading series, static triaxial tests and consolidation tests were also performed to find out the general properties of the soft clay, such as failure envelope, critical state line and past maximum pressure. From cyclic loading test, critical cyclic stress level for Bangkok soft clay was found. Cyclic loading was found to influence the static stress-strain behavior of clay during subsequent static loading and also reduced the static undrained strength. For normally consolidated clay, development of pore pressure during cyclic loading caused a king of overconsolidation effect by reducing mean principal stress. The basic testing program also gave information about magnitude of internal damping, shear modulus and development of strains and pore pressure during cyclic loading. |
| Year | 1985 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Yamada, Yasuo |
| Examination Committee(s) | Balasubramaniam, A.S. ;Rantucci, Giovanni |
| Scholarship Donor(s) | Asian Institute of Technology Partial |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1985 |