EFFECT ANALYSIS OF LONG-TERM CYCLIC LOADING ON LATERAL BEARING CHARACTERISTICS FOR LARGE DIAMETER MONOPILE

被引：0
|
作者：
Lai Y. [1 ,2 ]
Sun Y. [3 ,4 ,5 ]
Li W. [1 ]
Qi H. [1 ]
Xu C. [2 ]
He B. [1 ]
机构：
[1] Power China Huadong Engineering Limited Corporation, Hangzhou
[2] Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing
[3] College of Civil Engineering and Architecture, Wenzhou University, Wenzhou
[4] Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou
[5] Zhejiang Engineering Research Center of Disaster Prevention and Mitigation for Coastal Soft Soil Foundation, Wenzhou
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 03期
关键词：
bearing capacity; cyclic loads; offshore wind turbines; pile foundation;
D O I：
10.19912/j.0254-0096.tynxb.2023-0163
中图分类号：
学科分类号：
摘要：
Offshore wind turbine structural system is usually struck by lateral cyclic loads such as wave and wind. Ratchet effect and a dense subsidence zone in the vicinity of offshore pile is caused by these dynamic cyclic loads. It is necessary that the influence of cyclic loads on bearing characteristics for offshore pile is revealed. Based on finite difference software FLAC3D calculation platform， a numerical calculation model of offshore monopile was established，and the reliability of this numerical model was verified by comparing with the existing pile tests. Then，a simplified model was used in this numerical model to simulate the dense subsidence zone caused by long-term effect of cyclic loads. A compared study between considering and no-considering a dense subsidence zone is conducted to present the difference of bearing performance. These differences of pile deformation， pile bending moment and p- y curve are discussed，and the influence law of long-term effect of cyclic loads on the bearing characteristics of monopole is analyzed. The results show that the dense subsidence zone has no effect on the position of the rigid rotation point of monopile. But the dense subsidence zone has a significant effect on the horizontal displacement of pile in the shallow buried area，and a sudden change of the bending moment for pile is caused. © 2024 Science Press. All rights reserved.
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页码：116 / 121
页数：5
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