Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1719833 | Applied Ocean Research | 2016 | 18 Pages |
Abstract
This paper, Part II, presents two soil modelling approaches developed specifically for fatigue analysis of well conductors. The first approach uses Winkler springs and can account for soil damping. The second approach is based on continuum soil mechanics and uses the kinematic hardening principles. They focus on cyclic soil behaviour at the steady-state condition. The paper demonstrates appropriateness of the approaches in predicting fatigue damage through comparisons with the centrifuge fatigue lives measured from the Series 1 tests in NC to lightly OC kaolin clay. It also presents and discusses the analyzed data and the fatigue lives measured from the Series 2 (medium-dense sand), Series 3 (NC to lightly OC GoM clay), and Series 4 (OC natural clay) tests. Finally, soil models (based on the first approach) are presented for fatigue analysis of well conductors installed in NC to lightly OC clays, over-consolidated (OC) clays and medium-dense sands, and their ability to predict conductor fatigue damage under wide range of loading conditions is demonstrated. Overall, the accuracy of fatigue life predictions using these novel soil models is very high - generally within about a few percentages of the measured values.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Ocean Engineering
Authors
Arash Zakeri, Edward C. Clukey, Elizbar Buba Kebadze, Philippe Jeanjean,