ORIGINAL RESEARCH article
Front. Phys.
Sec. Interdisciplinary Physics
Volume 13 - 2025 | doi: 10.3389/fphy.2025.1627649
This article is part of the Research TopicUnderstanding Geomaterial Instability: Physics and Mechanics of Landslides and Seismic EventsView all 16 articles
Study on seismic response characteristics of the suction bucket group foundation in liquefiable sites
Provisionally accepted
- Jiangsu Earthquake Disaster Risk Mitigation Center, Nanjing, China
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
The multi-suction bucket foundation has the potential to enhance anti-overturning capacity by converting the overturning moment of the entire system into axial push-pull forces of individual buckets. In recent years, offshore wind turbines with multi-bucket suction bucket group foundations have been successively put into production and use in China. However, research addressing the seismic dynamic performance of quad-bucket suction foundations embedded in saturated sandy strata remains scarce. Therefore, studying the seismic dynamic response of suction bucket group foundations is of significant practical importance. Based on the finite-element software OpenSees and focusing on the characteristics of liquefiable sites, this paper establishes a numerical model of a four-bucket suction bucket group foundation in saturated sand using an actual engineering project as the background. Considering the effects of earthquake and sand liquefaction, the seismic dynamic response and displacement variations of the four-bucket foundation in liquefiable sites are investigated. The results show that: under seismic action, the peak horizontal displacement of the suction buckets occurs synchronously with the peak ground acceleration; vertical settlement exhibits nonlinear growth with increasing peak ground acceleration, and differential settlement of the foundation is significantly aggravated in liquefiable sites; the excess pore water pressure ratio 𝛾 𝑢 serves as a key index for quantifying soil liquefaction, and when 𝛾 𝑢 ≥ 1, the soil inside the buckets is completely liquefied, leading to a sudden drop in foundation bearing capacity.
Keywords: Suction bucket group foundation, Seismic dynamic response, Liquefaction site, Influencing factors, OpenSEES
Received: 13 May 2025; Accepted: 02 Jul 2025.
Copyright: © 2025 Tao and Gao. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Xiaosan Tao, Jiangsu Earthquake Disaster Risk Mitigation Center, Nanjing, China
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.