Author(s)

Xiaojian Luo ¹, Changwei Shi ¹, Songke Wei ¹, Liangwei Sun ², Chao Liang ², Rui Liang ²

Affiliation(s)

¹ CNPC Offshore Engineering Company Limited, Beijing, 102600, China
² State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin, 300072, China

Corresponding Author

Rui Liang

ABSTRACT

Offshore wind power pile foundation will bear the horizontal static and dynamic loads generated by wind, wave and current during service, and its long-term stability has attracted much attention. Using numerical simulation as the analysis method and based on the stiffness attenuation model, a study was conducted on the cumulative deformation of a monopile under cyclic loading in sand, revealing the influence of the number of cyclic loads, amplitude, and soil parameters on the cumulative deformation of monopile. The results show that: the cumulative deformation of monopile is greatly affected by the amplitude of cyclic load. When ζb < 0.4, the cumulative deformation increases with the increase of the number of cyclic load and gradually tends to be stable; when ζb reaches 0.4, the cumulative deformation increases sharply with the increase of the number of cycles. The cumulative deformation of monopile increases gradually with the decrease of soil elastic modulus and friction angle. When the depth of monopile increases to a certain range, the sensitivity of cumulative deformation to soil elastic modulus decreases.

KEYWORDS

Offshore wind power, Pile foundation, Multidirectional cyclic load, Horizontal bearing capacity, Cumulative deformation

CITE THIS PAPER

Xiaojian Luo, Changwei Shi, Songke Wei, Liangwei Sun, Chao Liang, Rui Liang, Finite Element Analysis of Monopile Horizontal Deformation under Cyclic Load. Journal of Civil Engineering and Urban Planning (2024) Vol. 6: 17-25. DOI: http://dx.doi.org/10.23977/jceup.2024.060403.

REFERENCES

[1] Wu Xiaoni, Liao Qian, Li Ye. A Review of the Load-Carrying Characteristics of Suction Bucket Foundations for Offshore Wind Turbines [J]. Journal of Ocean Technology, 2020, 39(01): 91-106.
[2] American Petroleum Institute (API). Geotechnical and Foundation Design Considerations[S]. Washington: API, 2011.
[3] Matlock H. Correlations for design of laterally loaded piles in soft clay[J]. Offshore Technology in Civil Engineering’s Hall of Fame Papers from the Early Years, 1970, 1: 77-94
[4] Reese L C, Welch R C. Lateral loading of deep foundations in stiff clay[J]. Journal of the Geotechnical Engineering Division, 1975, 101(7): 633-649.
[5] Long J H, Vanneste G. Effects of cyclic lateral loads on piles in sand[J]. Journal of Geotechnical Engineering, 1994, 120(1): 225-244.
[6] Peng J, Clarke B G, Rouainia M. Increasing the resistance of piles subject to cyclic lateral loading[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2011, 137(10): 977-982.
[7] Truong P, Lehane B M, Zania V, et al. Empirical approach based on centrifuge testing for cyclic deformations of laterally loaded piles in sand[J]. Géotechnique, 2019, 69(2): 133-145.
[8] Guo Yushu, Yakemus Martin, Abdurrahman Harri. Estimation of lateral deformation of monopile foundations by use of cyclic triaxial tests [J]. Chinese Journal of Geotechnical Engineering, 2009, 31(11): 1729-1734.
[9] Cao Guangwei, Ding Xuanming, Zhang Dingxin, et al. Bearing behaviors of large-diameter monopiles in soft clay under horizontal cyclic loading based on centrifugal model tests [J]. Chinese Journal of Geotechnical Engineering, 2023, 45(8): 1574-1585.
[10] Rudolph C, Bienen B, Grabe J. Effect of variation of the loading direction on the displacement accumulation of large-diameter piles under cyclic lateral loading in sand[J]. Canadian Geotechnical Journal, 2014, 51(10): 1196-1206.
[11] Achmus M, Kuo Y S, Abdel-Rahman K. Behavior of monopile foundations under cyclic lateral load[J]. Computers and Geotechnics, 2009, 36(5): 725-735. 
[12] Kuo Y S, Achmus M, Abdel-Rahman K. Minimum embedded length of cyclic horizontally loaded monopiles[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2012, 138(3): 357-363.

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