| Author | Kankia, Lawal Umar |
| Note | A thesis submitted in partial fulfillment of the requirements for the
The degree of Master of Engineering
In Offshore Technology and Management, Self-support, AIT Fellowship Scheme |
| Publisher | Asian Institute of Technology |
| Abstract | This study introduces the use of finite element analysis to evaluate the integrity challenges posed by natural hazards to offshore pipeline. Magnitude moment Mw is compared to the extreme displacement between the two sides of the fault slab.
A non-linear three-dimensional (3D) finite element model of offshore natural gas fault crossing pipeline is established to perform the failure analysis of API 5L Grade X-65 steel pipe. The effect of fault type and displacement magnitude, pipeline-fault crossing angle, varying pipeline diameter (D) and wall thickness are evaluated based on the geological complexity associated with earthquake triggered fault movement, the relationship between pipeline and soil interface was simulated to account for friction, contact thickness with consideration of soil non-linearity among several other offshore pipeline loading effects.
The results indicated that the magnitude displacement varies in all cases and the highest response to strike-slip fault displacement is along the axis of pipeline crossing most perpendicular to the fault plain.
The von mises stress and strain values are within the specified minimum yield stress (SMYS). The reverse (uplift) fault presented an upper bound stress and strain value than the strike-slip fault and are recorded most high at anchor points. |
| Year | 2011 |
| 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) | Chiu, Gregory L. F.;Pornpong Asavadorndeja; |
| Examination Committee(s) | Boswell, Laurie F.; |
| Scholarship Donor(s) | Self-support, AIT Fellowship Scheme; |