Study on Horizontal Load-Bearing and Deformation Performances of Monopile Foundations for Offshore Wind Turbines Based on In-Situ Static Load Tests

LI Zhenling; QIN Siyuan

doi:10.13204/j.gyjzG22122304

Volume 53 Issue 6

Jun. 2023

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(6): 13-18

LI Zhenling, QIN Siyuan. Study on Horizontal Load-Bearing and Deformation Performances of Monopile Foundations for Offshore Wind Turbines Based on In-Situ Static Load Tests[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 13-18. doi: 10.13204/j.gyjzG22122304

Citation:

LI Zhenling, QIN Siyuan. Study on Horizontal Load-Bearing and Deformation Performances of Monopile Foundations for Offshore Wind Turbines Based on In-Situ Static Load Tests[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 13-18. doi: 10.13204/j.gyjzG22122304

Citation:

LI Zhenling, QIN Siyuan. Study on Horizontal Load-Bearing and Deformation Performances of Monopile Foundations for Offshore Wind Turbines Based on In-Situ Static Load Tests[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 13-18. doi: 10.13204/j.gyjzG22122304

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Study on Horizontal Load-Bearing and Deformation Performances of Monopile Foundations for Offshore Wind Turbines Based on In-Situ Static Load Tests

doi: 10.13204/j.gyjzG22122304

CGN New Energy Holdings Co., Ltd., Beijing 100071, China

Received Date: 2022-12-23
Available Online: 2023-08-18

Abstract

Abstract

The horizontal bearing capacity and deformation characteristics for monopile foundations of offshore wind turbines directly influenced the stability and safety of the whole structure and wind turbine operation. In order to study the horizontal bearing capacity and deformation characteristics of monopile foundations, finite element numerical simulations were used to analyze the pile-soil contact model, soil parameters and variable characteristics of horizontal displacement and bending moment of piles based on the in-situ static load tests of single piles. Moreover, the method of the p-y curve recommended by the specification of API RP 2A-WSD was applied to compare the numerical simulation results with that from in-situ tests. It indicated that the simulation results were in good agreement with the measured data from in-situ tests at different load levels. The errors between the horizontal displacement of piles by the p-y curve method and in-situ tests increased with the increase of horizontal loads, which indicated that the p-y curve method was conservative. With the increase of horizontal loads, the horizontal deformation of piles gradually increased, the maximum bending moment points tended to move down, and the reverse bending point was about 14 m to16 m below the mud surface. The deformation and plastic zone of foundation soil gradually extended from the surface to the deep. Therefore, the model of pile-soil interfaces and the selection of geotechnical parameters were basically reasonable, and the rationality and effectiveness of finite element numerical simulations were verified.
- offshore wind power project,
- monopile foundation,
- in-situ test,
- horizontal bearing capacity and deformation characteristic

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References(18)

References

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