Failure Envelopes of Bucket Foundations for Offshore Wind Turbines under Combined Loading Including Torsion
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The loading condition of bucket foundations for offshore wind turbines is very complicated and often under combined loading, but the torsion is always ignored. So, it is necessary to investigate the failure envelopes including torsion of bucket foundations. Under the premise of validating the reliability of the numerical model by comparing with other published data, failure envelopes in each loading space are obtained and the applicability of swipe test for the determination of H-T failure envelope and M-T failure envelope of bucket foundations is explored. The impacts of torsion and aspect ratio on the combined bearing capacities are studied. While revealing the law of impacts, equations are proposed to determine the respective failure envelopes and evaluate the combined bearing capacities. The V-H-M-T failure envelope can reveal the torsion effect on envelope under traditional V-H-M loading, the results show that the normalized V-H-M failure envelopes under different torsions almost coincide, torsion effect can be easily considered according to this characteristic.
Keywordsoffshore wind turbine bucket foundation combined loading failure envelope torsion
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This work was supported by the National Natural Science Foundation of China (No. 51679060).
- Abyaneh, S. D., Ojo, A, Maconochie, A, and Haghighi, A. (2015). “The undrained bearing capacity of shallow foundations subjected to three-dimensional loading including torsion.” Proc. of 25th International Ocean and Polar Engineering Conference, Hawaii, USA, pp. 668–674.Google Scholar
- Fan, Q, Zheng, J, and Ma. S. (2018). “An investigation of failure envelope for skirted foundations in soft clay based on computer-aided analyses.” Wireless Personal Communications, Vol. 103, No. 2, pp. 1219- 1228, DOI: 10.1007/sll277-018-5482-2.Google Scholar
- Mansur, C. I. and Kaufman, J. M. (1956). “Pile tests, low-sill structure, Old River, Louisiana.” Journal of Soil Mechanics and Foundation Division, Vol. 82, No. SM5, pp. 1–33.Google Scholar
- Martin, C. (2003). “New software for rigorous bearing capacity calculations.” Proc, Conf, on Foundations: Innovations, Observations, Design and Practice, Thomas Telford, London, UK, pp. 581–592.Google Scholar
- Mehravar, M, Harireche, O, and Faramarzi, A. (2016). “Evaluation of undrained failure envelopes of caisson foundations under combined loading.” Applied Ocean Research, Vol. 59, pp. 129–137, DOI: 10.1016/j.apor.2016.05.001.Google Scholar
- Shen, Z, Bie, S, and Guo, L. (2017). “Undrained capacity of a surface circular foundation under fully three-dimensional loading.” Computers and Geotechnics, Vol. 92, pp. 57–67, DOI: 10.1016/j.compgeo.2017. 07.018.Google Scholar
- Taiebat, H. A. and Carter, J. P. (2004). “Effects of torsion on caisson capacity in clay.” Proc. of Australia New Zealand Geomechanics Conference, Auckland, New Zealand, pp. 130–136.Google Scholar
- Taiebat, H. A. and Carter, J. P. (2005). “Interaction of forces on caissons in undrained soils.” Proc. of 15th International Offshore and Polar Engineering Conference, Seoul, Korea, pp. 625–632.Google Scholar
- Tan, F. S. C. (1990). Centrifuge and theoretical modelling of conical footings on sand, PhD Thesis, Cambridge University, Cambridge, UK.Google Scholar
- Zhan, Y. G. and Liu, R. C. (2010). “Numerical analysis of bearing capacity of suction bucket foundation for offshore wind turbines.” Electronic Journal of Geotechnical Engineering, Vol. 15, No. 10, pp. 76–81.Google Scholar