Affiliation:
1. Centre for Offshore Foundation Systems, The University of Western Australia, Perth, WA 6009, Australia.
Abstract
The capacity of dynamically installed anchors in soft normally consolidated clay was examined experimentally through a series of field tests on a 1:20 reduced-scale anchor. The anchors were installed through free fall in water, achieving tip embedment of 1.5–2.6 times the anchor length, before being loaded under undrained conditions at various load inclinations. Vertical anchor capacities were between 2.4 and 4.1 times the anchor dry weight and were satisfactorily predicted using the American Petroleum Institute approach for driven piles. Anchor capacity under inclined loading increased as the load inclination approached horizontal; the field data indicated this increase to be up to 30% for the minimum achievable inclination of about 20° to the horizontal. Corresponding large-deformation finite element analyses showed a similar response, with the maximum capacity occurring at a load inclination between 30° and 45° to the horizontal. The finite element results demonstrate that, for the anchor geometry considered, an inclined load at the anchor padeye could be decomposed into ultimate vertical and moment loading at the anchor centroid. The establishment of a vertical and moment loading yield envelope for the geometry investigated forms the basis of a simple design procedure presented in the paper.
Publisher
Canadian Science Publishing
Subject
Civil and Structural Engineering,Geotechnical Engineering and Engineering Geology
Reference25 articles.
1. American Petroleum Institute. 2002. Recommended practice for planning, designing and constructing fixed offshore platforms — working stress design, API RP 2A-WSD, Washington D.C., USA.
2. Capacity of dynamically embedded plate anchors as assessed through field tests
3. Brandão, F.E.N., Henriques, C.C.D., de Araújo, J.B., Ferreira, O.C.G., and Amaral, C.S. 2006. Albacora Leste field development — FPSO P-50 mooring system concept and installation. In Proceedings of the 2006 Offshore Technology Conference, Houston, Texas, USA, Paper No. OTC 18243. 10.4043/18243-MS.
4. A plasticity model to assess the keying of plate anchors
5. Influence of overburden pressure and soil rigidity on uplift behavior of square plate anchor in uniform clay
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