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Dynamic installation, keying and diving of OMNI-Max anchors in clay.
- Source :
-
Géotechnique . Jan2017, Vol. 67 Issue 1, p78-85. 8p. - Publication Year :
- 2017
-
Abstract
- OMNI-Max anchors are designed with the aim of diving upon pullout, gaining capacity with increasing pullout distance. However, this diving potential is yet to be confirmed; that is, the critical question to be resolved is whether or not the anchor dives upon pullout and, if so, in what conditions. This paper reports the results from three-dimensional dynamic finite-element analysis undertaken to provide insight into the behaviour of OMNI-Max anchors during pullout in non-homogeneous clay. Large-deformation finite-element (LDFE) analyses were carried out using the coupled Eulerian-Lagrangian approach, modifying the simple elastic-perfectly plastic Tresca soil model to allow strain softening, and to incorporate strain-rate dependency of the shear strength. The keying process and diving patterns during anchor pullout revealed three governing factors including: ( a) pullout inclination angle; ( b) padeye offset ratio; ( c) final installation depth. For designing anchors to dive into deeper, it was recommended that the anchor loading angle to the horizontal at the padeye should be 45° or less and the anchor padeye offset ratio should be in the range of 0·25 ∼ 0·53 (offset angle of 14 ∼ 28°). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00168505
- Volume :
- 67
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Géotechnique
- Publication Type :
- Academic Journal
- Accession number :
- 120009972
- Full Text :
- https://doi.org/10.1680/jgeot.16.T.008