Hits:

Indexed by:期刊论文

Date of Publication:2009-05-01

Journal:COMPUTERS AND GEOTECHNICS

Included Journals:SCIE、EI

Volume:36

Issue:4

Page Number:558-567

ISSN No.:0266-352X

Key Words:Plate anchor; Keying; Finite element analysis; Bearing capacity; Large deformation; Offshore foundation

Abstract:Plate anchors, such as suction embedded plate anchors and vertically driven plate anchors, offer economically attractive anchoring solutions for deep/ultra-deep water offshore developments. The rotation/keying processes of plate anchors will cause embedment losses, which lead to decreases of the uplift resistances of the anchors in normally consolidated soil. In the present paper, the keying processes of vertically installed strip and square plate anchors are simulated using the 3-D large deformation finite element method. The effects of loading eccentricity and pullout angle on the embedment loss during keying are investigated. Both the development of the uplift resistance and the soil flow mechanisms are presented. The numerical results show that the loading eccentricity e/B has a much larger effect on the embedment loss than the pullout angle does. The anchor shape has a minimal effect on the loss in anchor embedment. The shape factors (square/strip) are 1.05-1.09 for loss of embedment and 1.10-1.19 for capacity. (C) 2008 Elsevier Ltd. All rights reserved.