000			a
999			_c19838 _d19838
003			OSt
005			20230831101751.0
008			230831b xxu||||| |||| 00| 0 eng d
040			_aAIKTC-KRRC _cAIKTC-KRRC
100			_921662 _aNigitha, D.
245			_aBehaviour of a large-diameter monopile under two-way lateral cyclic load
250			_aVol.53(2), Apr
260			_aUSA _bSpringer _c2023
300			_a377-393p.
520			_aLarge-diameter monopiles are the dominant foundations for the substructure in offshore wind turbine installation. The predominant load such as wind and wave on OWT installed in the offshore environment is cyclic, which affects the soil–pile system's displacement and stiffness characteristics. In the present study, small-scale tests and numerical analyses using PLAXIS 3D were conducted on a single pile embedded in cohesionless soil and subjected to cyclic lateral loading. The effect of load amplitude on displacement and stiffness was investigated by the laboratory model test as well as the numerical analysis of the prototype monopile. From the 1 g model test and the numerical analysis, it was observed that the normalized displacement increases with an increasing number of cycles for a load amplitude ξb = 60% of the ultimate capacity of the monopile. Also, the soil–pile system showed ratcheting behaviour for a load amplitude ξb = 60% of the ultimate capacity. The rate of increase in the accumulated displacement was observed to decrease with an increasing number of cycles due to the densification of sand around the monopile. The serviceability limit state undergoes the shakedown mechanism, while the fatigue limit state undergoes the reversal of accumulated displacement. The change in stiffness was observed to increase with an increasing number of cycles. However, for the two-way loading, the stiffness was observed higher for low load amplitude.
650		0	_94621 _aCivil Engineering
700			_921663 _aRathod, Deendayal
773	0		_dSwitzerland Springer _tIndian geotechnical journal _x 0971-9555
856			_uhttps://link.springer.com/article/10.1007/s40098-022-00677-1 _yClick here
942			_2ddc _cAR