Centrifuge Tests on the Lateral Behavior of Offshore Monopile in Saturated Dense Sand under Cyclic Loading

Lee, Myungjae; Yoo, Mintaek; Bae, Kyung-Tae; Kim, Youseok; Nam, Boo Hyun; Youn, Heejung

doi:10.1520/jte20180063

Cited by 2 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, this study used Equation 3and fitted the test data to the ultimate soil resistance curve according to depth. Equation 3has been used by several researchers [27,29,30] and it is a modification of an equation by Broms [18].…”

Section: Ultimate Soil Resistance (P U )mentioning

confidence: 99%

Cyclic p-y Curves of Monopiles in Dense Dry Sand Using Centrifuge Model Tests

et al. 2019

View full text Add to dashboard Cite

In this study, centrifuge model tests were used to examine the lateral behavior of amonopile embedded in dry sand through cyclic lateral loading tests. The soil specimens used in thetests were dry Jumunjin sand with a relative density of 80% and a friction angle of 38°. A staticloading test was performed once, and cyclic loading tests were performed four times using fourmagnitudes of cyclic load (30%, 50%, 80%, and 120% of static lateral capacity). The experimentalcyclic p‐y curve was obtained through the tests, and the maximum soil resistance points that werefound for each load were used to find the cyclic p‐y backbone curve for each depth. The twovariables which are needed to define the cyclic p‐y backbone curve, i.e., the initial modulus ofsubgrade reaction (kini) and ultimate soil resistance (pu), were suggested as functions of the soil’sphysical properties and the pile. The cyclic p‐y curve of the first cycle and the 100th cycle wereformulated to present the upper limit and lower limit. The suggested cyclic p‐y curve had anoverestimated soil resistance compared with the existing API (1987) method, but the initial modulusof subgrade reaction was underestimated.

show abstract

Section: Ultimate Soil Resistance (P U )mentioning

confidence: 99%

Cyclic p-y Curves of Monopiles in Dense Dry Sand Using Centrifuge Model Tests

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Wind turbines therein are usually supported by large-scale shallow foundations lied on the strongly weathered rock, karst, or residual soils. Unlike building structures, dynamic wind loads are the main forces for a wind turbine, which could produce considerable vibrations and increased stresses, strains, and deformations in the structure, foundation, and subsoil [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Field Monitoring and Numerical Analysis of the Reinforced Concrete Foundation of a Large‐Scale Wind Turbine

Zhou¹,

Xin-xi²,

Deng³

et al. 2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

The objective of this study is to examine the performance of the shallow reinforced concrete foundation of a large-scale wind turbine under the influence of environmental loads. A 2 MW horizontal-axis onshore wind turbine supported by a shallow concrete foundation was considered. The foundation stresses, foundation settlements, and static and dynamic contact pressures at various positions of the shallow foundation were monitored from the construction phase to the operation phase in the field. Numerical simulations were also performed to further analyze the behavior of the wind turbine foundation in different cases. The results demonstrate that the responses of the reinforced concrete foundation, i.e., foundation stresses, contact pressures, and foundation settlements, were variables closely related to the wind direction and wind speed. The distribution of foundation stresses suggested that a reasonable design of steel reinforcement cages around the foundation steel ring is important. The dynamic contact pressure of the foundation could reach 5 kPa, so the influence of dynamic wind loads on the foundation response could not be always neglected, particularly for the foundations seated on weak soils. The foundation settlement during the operation phase could be characterized by the logistic model, but its distribution was uneven due to the presence of eccentric upper weight and wind load. The findings would provide guidance for the foundation design of onshore wind turbines in hilly areas.

show abstract

Centrifuge Tests on the Lateral Behavior of Offshore Monopile in Saturated Dense Sand under Cyclic Loading

Cited by 2 publications

References 34 publications

Cyclic p-y Curves of Monopiles in Dense Dry Sand Using Centrifuge Model Tests

Cyclic p-y Curves of Monopiles in Dense Dry Sand Using Centrifuge Model Tests

Field Monitoring and Numerical Analysis of the Reinforced Concrete Foundation of a Large‐Scale Wind Turbine

Contact Info

Product

Resources

About