This work proposes a new plastic hardening, non-associative macro-element model to predict the behaviour of anchors in clay for floating offshore structures during keying and up to the peak load. Building on available models for anchors, a non-associated plastic potential is introduced to improve prediction of anchor trajectory and loss of embedment at peak conditions for a large range of padeye offsets and different pull-out directions. The proposed model also includes a displacement-hardening rule to simulate the force and displacement mobilisation at the early stages of the keying process. The model is challenged and validated against different sets of numerical and centrifuge data. This extensive validation process revealed that two of the four newly introduced model parameters assume a constant value for the range of simulated cases. This suggests that only two of the newly introduced parameters may need to be calibrated for the use of the proposed macro-element model in practice.
Bibliographical noteFunding Information:
The first author would like to acknowledge the international Ph.D. student grant provided by the University of Bristol. This work was also supported by the Research Collaboration Award RA/1/1200/723 provided by The University of Western Australia.
© 2021, Canadian Science Publishing. All rights reserved.
- plate anchor
- macro-element model
- pull-out resistance
- floating offshore structures