This study presents an upper bound plastic limit analysis for predicting drag
anchor trajectory and load capacity. The shank and fluke of the anchor are idealized as
simple plates. The failure mechanism involves the motion of the anchor about a center
of rotation, the coordinates of which are systematically optimized to determine the
minimum load at the shackle. For a given anchor orientation, the direction of the
shackle force is varied to establish a relationship between the magnitude and direction of
the shackle load. Coupling this relationship to the Neubecker-Randolph anchor line
solution produces a unique solution for the magnitude and orientation of the shackle
force. The anchor is then advanced a small increment about the optimum center of
rotation and the process is repeated. The upper bound method (UBM) provides a
practical means to determine the trajectory of the anchor and the anchor load capacity at
any point in the trajectory. To better understand of the anchor behavior, extensive
parameter studies were carried out varying the properties of the anchor, anchor line, and
soil. The UBM show good agreement with six full-scale tests covering several different
anchor types and centrifuge model tests.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/4887 |
| Date | 25 April 2007 |
| Creators | Kim, Byoung Min |
| Contributors | Aubeny, Charles., Murff, Don. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 2895594 bytes, electronic, application/pdf, born digital |
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