饱和黏土中吸力桶基础离心振动台试验及地震响应分析

doi:10.3724/1000-6915.jrme.2024.0542

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1662 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要我国近海风电场表层海床主要为软黏土，易发生循环弱化与变形累积。在地震作用下吸力桶基础及上部结构可发生位移过量累积，威胁风机正常服役。开展单桶及多桶导管架基础风机离心振动台试验，并基于考虑土体小应变刚度的循环加载不排水黏土总应力本构模型，建立吸力桶基础风机地震响应数值模型。通过数值计算与离心模型试验结果进行对比，验证数值方法的合理性。利用建立的数值方法，探究静力加载特性一致条件下，不同吸力桶基础型式(单桶与多桶导管架)对地震荷载下风机上部结构加速度与变形响应的影响，并讨论风机响应与基础型式对地震荷载主频过滤效应的关联关系。研究结果表明：该数值模型可以合理反映黏土地基吸力桶基础及风机结构的地震响应；风机塔顶最终累积位移与其振动幅值具有较强相关性；静力加载特性一致时，与单桶基础相比，多桶基础可过滤部分地震荷载高阶主频振动，从而导致更小的塔顶加速度及累积位移。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	崔鹤1
	2
	黄茂松1
	2
	时振昊1
	2

关键词 ：土力学, 离心振动台试验, 吸力桶基础, 风机, 地震, 数值模拟

Abstract：The shallow seabed in China's offshore wind farms is primarily composed of soft clay that can exhibit remarkable cyclic softening and deformation accumulation. Accordingly，suction caisson foundations and the supported superstructure can show excessive displacement accumulation under seismic loading，and thus threatening serviceability of wind turbine. This works conducts centrifuge shaking table tests for turbine supported by single caisson and multi-caisson jacket foundations in undrained clays，and constructs corresponding numerical model based on an undrained total stress-based constitutive model for cyclic loaded clay accounting for small-strain stiffness. The numerical model was validated against experimental data. By using numerical simulations，this work studies the effects of foundation types on the acceleration and deformation response of wind turbine superstructure under seismic loading. The relationships between turbine seismic response and filtering frequency-contents of earthquake loading via foundations are explored. This study shows that the proposed numerical model can reasonably capture the seismic response of suction caisson foundation and superstructure. There are strong correlations between magnitude of turbine tower accumulative displacement and its vibration intensity during earthquake. When featuring similar static loading characteristics，compared to single-caisson foundation，multi-caisson jacket can filter certain higher-order frequencies of seismic loading，and thus leading to smaller superstructure acceleration and consequently lower cumulative displacements.

Key words： soil mechanics centrifuge shaking table tests suction caisson turbine earthquake numerical simulation

引用本文:

崔鹤1，2，黄茂松1，2，时振昊1，2. 饱和黏土中吸力桶基础离心振动台试验及地震响应分析[J]. 岩石力学与工程学报, 2025, 44(3): 769-780.
CUI He1，2，HUANG Maosong1，2，SHI Zhenhao1，2. Centrifugal shaking table tests and seismic response analysis of suction caisson foundation in saturated clay. , 2025, 44(3): 769-780.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2024.0542 或 https://rockmech.whrsm.ac.cn/CN/Y2025/V44/I3/769

[1]	LIU B，ZHANG Y H，MA Z R，et al. Design considerations of suction caisson foundations for offshore wind turbines in Southern China[J]. Applied Ocean Research，2020，104：102358.
[2]	DE RISI R，BHATTACHARYA S，GODA K. Seismic performance assessment of monopile-supported offshore wind turbines using unscaled natural earthquake records[J]. Soil Dynamics and Earthquake Engineering，2018，109：154-172.
[3]	KOURKOULIS R，LEKKAKIS P，GELAGOTI F，et al. Suction caisson foundations for offshore wind turbines subjected to wave and earthquake loading：effect of soil-foundation interface[J]. Géotechnique，2014，64(3)：171-185.
[4]	ANASTASOPOULOS I，THEOFILOU M. Hybrid foundation for offshore wind turbines： Environmental and seismic loading[J]. Soil Dynamics and Earthquake Engineering，2016，80：192-209.
[5]	PROWELL I，ELGAMAL A，LU J. Modeling the influence of soil structure interaction on the seismic response of a 5 MW wind turbine[C]// 5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. San Diego，California：[s. n.]，2010，33：5.09a.
[6]	ZHANG J X，CHENG W L，CHENG X L，et al. Seismic responses analysis of suction bucket foundation for offshore wind turbine in clays[J]. Ocean Engineering，2021，232：109-159 .
[7]	YANG Y，BASHIR M，LI C，et al. Mitigation of coupled wind-wave-earthquake responses of a 10 MW fixed-bottom offshore wind turbine[J]. Renewable Energy，2020，157：1 171-1 184.
[8]	张小玲，李赟琪，王丕光，等. 黏土中海上风力机桩-筒复合基础地震响应分析[J]. 太阳能学报，2024，45(2)：189-197.(ZHANG Xiaoling，LI Yunqi，WANG Peiguang，et al. Seismic response analysis of pile-bucket composite foundation for offshore wind turbine in clay[J]. Acta Energiae Solaris Sinica，2024，45(2)：189-197.(in Chinese))
[9]	YU H，ZENG X W，LI B，et al. Centrifuge modeling of offshore wind foundations under earthquake loading[J]. Soil Dynamics and Earthquake Engineering，2015，77：402-415.
[10]	WANG X F，YANG X，ZENG X W. Seismic centrifuge modelling of suction bucket foundation for offshore wind turbine[J]. Renewableenergy，2017，114：1 013-1 022.
[11]	SALEH ASHEGHABADI M，SAHAFNIA M，BAHADORI A，et al. Seismic behavior of suction caisson for offshore wind turbine to generate more renewable energy[J]. International Journal of Environmental Science and Technology，2019，16：2 961-2 972.
[12]	付毳，黄福云，陈宝春，等. 沿海软土地区PHC管桩-土-结构模型振动台试验[J]. 中国公路学报，2017，30(10)：81-92.(FU Cui，HUANG Fuyun，CHEN Baochun，et al. Shaking table test on structure-soil-pile of PHC in coastal soft-soil area[J]. China Journal of Highway and Transport，2017，30(10)：81-92.(in Chinese))
[13]	WANG F，ZHANG H，ZHOU J，et al. Shaking table test of prestressed high-strength concrete pipe piles reinforced with non-prestressed steel reinforcement[J]. Engineering Structures，2024，300：117211.
[14]	刘润，马鹏程，练继建. 黏土中宽浅式筒型基础与地基的地震响应[J]. 天津大学学报：自然科学与工程技术版，2020，53(4)：366-377.(LIU Run，MA Pengcheng，LIAN Jijian. Seismic response of shallow bucket foundation of soft clay[J]. Journal of Tianjin University：Science and Technology，2020，53(4)：366-377.(in Chinese))
[15]	ZHENG B L，KUTTER B L，HIRT G S，et al. Centrifuge modeling of seismic behavior of caisson-supported subsea manifold on soft clay[C]// The 6th International Conference on Earthquake Geotechnical Engineering. Christchurch，New Zealand：[s. n.]，2015：1-9.
[16]	SHI Z H，LIU L，HUANG M S，et al. Simulation of cyclic laterally-loaded piles in undrained clays accounting for soil small-strain characteristics[J]. Ocean Engineering，2023，267：113268.
[17]	时振昊，黄茂松，倪雨萍. 基于颗粒间应变的饱和黏土小应变各向异性非线性本构模型[J]. 岩土力学，2021，42(4)：1 036-1 044.(SHI Zhenhao，HUANG Maosong，NI Yuping. Intergranular-strain based constitutive model for saturated clay with anisotropic small-strain stiffness[J]. Rock and Soil Mechanics，2021，42(4)：1 036-1 044.(in Chinese))
[18]	张中杰，刘磊，时振昊，等. 含桩基础地下结构的软黏土场地震陷数值分析[J]. 土木工程学报，2023，56(增2)：163-169.(ZHANG Zhongjie，LIU Lei，SHI Zhenhao，et al. Numerical analysis of earthquake-induced settlement of saturated soft clay with pile and underground structure[J]. China Civil Engineering Journal，2023，56(Supp.2)：163-169.(in Chinese))
[19]	张浩，张陈蓉，时振昊，等. 基于IGS小应变模型的基坑开挖对隧道影响数值模拟[J]. 岩土工程学报，2021，43(增2)：72-75. (ZHANG Hao，ZHANG Chenrong，SHI Zhenhao，et al. Numerical simulation of excavation effects on tunneling with IGS small strain model[J]. Chinese Journal of Geotechnical Engineering，2021，43(Supp.2)：72-75.(in Chinese))
[20]	YU J，LEUNG C F，HUANG M S. Response of monopile foundations under cyclic lateral loading in normally consolidated clay[J]. International Journal of Offshore and Polar Engineering，2018，28(4)： 411-418.
[21]	HO J. Cyclic and post-cyclic behavior of soft clay[Ph. D. Thesis][D]. Singapore：National University of Singapore，2013.
[22]	VARUN，ASSIMAKI D，GAZETAS G. A simplified model for lateral response of large diameter caisson foundations—Linear elastic formulation[J]. Soil Dynamics and Earthquake Engineering，2009，29：268-291.
[23]	ANTONIOU M，KOURKOULIS R，GALEGOTI F. Simplified method for performance-based seismic design of suction caissons supporting jacket offshore wind turbines[J]. Soil Dynamics and Earthquake Engineering，2022，155：107169.
[24]	LI S，YU J，HUANG M S，et al. Application of T-EMSD based p-y curves in the three-dimensional analysis of laterally loaded pile in undrained clay[J]. Ocean Engineering，2020，206：107256.