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A platform for research: civil engineering, architecture and urbanism
Effects of long-term cyclic horizontal loading on bucket foundations in saturated loose sand
Highlights 1-g experimental tests were carried out varying load magnitude. One-way cyclic horizontal loading is critical for offshore wind turbines. Accumulated rotations and unloading stiffness increase with number of load cycle. Accumulated rotations and unloading stiffness decrease with the increase in load magnitude. First load cycle causes larger suction in the foundation.
Abstract A 1-g model experimental study was conducted to investigate the accumulated rotations and unloading stiffness of bucket foundations in saturated loose sand. One-way horizontal cyclic loading was applied to model bucket foundations with embedment ratios 0.5 and 1.0. Up to 104 cycles of loading were applied at a frequency of 0.2 Hz varying load amplitudes. The accumulated rotation of the bucket foundations increased with the number of cycles and the load amplitudes. Empirical equations were proposed to describe the accumulated rotation of the foundations. The unloading stiffness of foundations increased with the number of cycles but decreased with an increase in load amplitude. The initial unloading stiffness of L/D = 1.0 (L is skirt length; D is foundation diameter) was approximately twice that of L/D = 0.5. Excess pore water pressure difference of 50% was observed between L/D = 0.5 and 1.0. The suction and static capacity of the bucket increased with increase of bucket embedment ratio with a difference of 69.5% and 73.6% respectively between L/D = 0.5 and 1.0.
Effects of long-term cyclic horizontal loading on bucket foundations in saturated loose sand
Highlights 1-g experimental tests were carried out varying load magnitude. One-way cyclic horizontal loading is critical for offshore wind turbines. Accumulated rotations and unloading stiffness increase with number of load cycle. Accumulated rotations and unloading stiffness decrease with the increase in load magnitude. First load cycle causes larger suction in the foundation.
Abstract A 1-g model experimental study was conducted to investigate the accumulated rotations and unloading stiffness of bucket foundations in saturated loose sand. One-way horizontal cyclic loading was applied to model bucket foundations with embedment ratios 0.5 and 1.0. Up to 104 cycles of loading were applied at a frequency of 0.2 Hz varying load amplitudes. The accumulated rotation of the bucket foundations increased with the number of cycles and the load amplitudes. Empirical equations were proposed to describe the accumulated rotation of the foundations. The unloading stiffness of foundations increased with the number of cycles but decreased with an increase in load amplitude. The initial unloading stiffness of L/D = 1.0 (L is skirt length; D is foundation diameter) was approximately twice that of L/D = 0.5. Excess pore water pressure difference of 50% was observed between L/D = 0.5 and 1.0. The suction and static capacity of the bucket increased with increase of bucket embedment ratio with a difference of 69.5% and 73.6% respectively between L/D = 0.5 and 1.0.
Effects of long-term cyclic horizontal loading on bucket foundations in saturated loose sand
Vicent, Ssenyondo (author) / Kim, Sung-Ryul (author) / Hung, Le Chi (author)
2019-08-03
Article (Journal)
Electronic Resource
English
Response of Cyclic-Loaded Bucket Foundations in Saturated Dense Sand
| Online Contents | 2017
Response of Cyclic-Loaded Bucket Foundations in Saturated Dense Sand
| British Library Online Contents | 2017