Proposed upper bound analysis for drag embedment anchors in soft clay
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This paper presents an upper bound plastic limit analysis for predicting drag anchor trajectory and load capacity in soft clay. 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 proposed method provides a practical means to determine the trajectory of the anchor and the anchor load capacity at any point in the trajectory. 2005 Taylor & Francis Group.
