Experimental Study on Whole Wind Power Structure with Innovative Open-Ended Pile Foundation under Long-Term Horizontal Loading
1
College of Architecture and Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
2
School of Engineering and Built Environment, Griffith University, Gold Coast Campus, Southport QLD 4222, Australia
3
Shandong Bureau of China Metallurgical Geology Bureau, Jinan 250014, China
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(18), 5348; https://doi.org/10.3390/s20185348
Received: 4 August 2020 / Revised: 2 September 2020 / Accepted: 15 September 2020 / Published: 18 September 2020
(This article belongs to the Section Physical Sensors)
The offshore wind energy (OWE) pile foundation is mainly a large diameter open-ended single pile in shallow water, which has to bear long-term horizontal cyclic loads such as wind and waves during OWE project lifetime. Under the complex cyclic loads, the stress and displacement fields of the pile-soil system change continuously, which affects the dynamic characteristics of the pile foundation. Within the service life of the pile foundation, the pile-soil system has irreversible cumulative deformation, which further causes damage to the whole structure. Therefore, it is important to examine the overall dynamic characteristics of wind power foundation under high cycle. In this paper, in the dry sand foundation, taking the Burbo Bank 3.6 MW offshore turbine-foundation structure as the prototype, the horizontal cyclic loading model tests of the wind power pile foundation with the scale of 1:50 were carried out. Considering the factors such as loading frequency and cyclic load ratio, the horizontal dynamic characteristics of the whole OWE pile foundation are studied. The comparison results between the maximum bending moment of pile and the fitting formula are discussed. In conclusion, moment of OWE pile shaft is corresponding to the loading frequency (f = 9 HZ) and loading cycles by fitting formulas. The fatigue damage of the OWE pile does not occurs with low frequencies in high cycles.
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MDPI and ACS Style
Liu, J.; Wan, Z.; Dai, X.; Jeng, D.; Zhao, Y. Experimental Study on Whole Wind Power Structure with Innovative Open-Ended Pile Foundation under Long-Term Horizontal Loading. Sensors 2020, 20, 5348. https://doi.org/10.3390/s20185348
AMA Style
Liu J, Wan Z, Dai X, Jeng D, Zhao Y. Experimental Study on Whole Wind Power Structure with Innovative Open-Ended Pile Foundation under Long-Term Horizontal Loading. Sensors. 2020; 20(18):5348. https://doi.org/10.3390/s20185348
Chicago/Turabian StyleLiu, Junwei; Wan, Zhipeng; Dai, Xingke; Jeng, Dongsheng; Zhao, Yanping. 2020. "Experimental Study on Whole Wind Power Structure with Innovative Open-Ended Pile Foundation under Long-Term Horizontal Loading" Sensors 20, no. 18: 5348. https://doi.org/10.3390/s20185348
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