李炜, 潘文豪, 樊健生. 海上风机单立柱三桩基础灌浆连接段轴向承载力试验研究[J]. 工程力学, 2016, 33(11): 148-154. DOI: 10.6052/j.issn.1000-4750.2015.04.0259
引用本文: 李炜, 潘文豪, 樊健生. 海上风机单立柱三桩基础灌浆连接段轴向承载力试验研究[J]. 工程力学, 2016, 33(11): 148-154. DOI: 10.6052/j.issn.1000-4750.2015.04.0259
LI Wei, PAN Wen-hao, FAN Jian-sheng. EXPERIMENTAL RESEARCH ON THE ULTIMATE AXIAL CAPACITY OF GROUTED CONNECTIONS IN TRIPOD SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES[J]. Engineering Mechanics, 2016, 33(11): 148-154. DOI: 10.6052/j.issn.1000-4750.2015.04.0259
Citation: LI Wei, PAN Wen-hao, FAN Jian-sheng. EXPERIMENTAL RESEARCH ON THE ULTIMATE AXIAL CAPACITY OF GROUTED CONNECTIONS IN TRIPOD SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES[J]. Engineering Mechanics, 2016, 33(11): 148-154. DOI: 10.6052/j.issn.1000-4750.2015.04.0259

海上风机单立柱三桩基础灌浆连接段轴向承载力试验研究

EXPERIMENTAL RESEARCH ON THE ULTIMATE AXIAL CAPACITY OF GROUTED CONNECTIONS IN TRIPOD SUPPORT STRUCTURES OF OFFSHORE WIND TURBINES

  • 摘要: 结合某海上风机单立柱三桩基础,对海上风机灌浆连接段进行轴向承载力试验。共设计四个试验模型,包括两个带剪力键的模型和两个无剪力键的模型。试验结果表明:带剪力键的模型承载力和延性比无剪力键的模型显著提高;受过疲劳荷载的带剪力键模型虽然延性有一定降低,但其承载力仍与未受过疲劳荷载的模型相当。该文还讨论了UK规范、API规范和新旧DNV规范建议的四个灌浆连接段轴向承载力经验公式。各公式之间的对比表明,它们都存在一定的缺点:API规范公式和旧版DNV规范公式形式还不太成熟,而UK规范公式和新版DNV规范公式试验数据参数范围不全。因此,该文最后建议提出一个灌浆连接段界面抗剪强度的新公式,以适应更广泛的工程应用条件。

     

    Abstract: An experimental research was conducted on the ultimate capacity of axial loaded grouted tubular connections to support the design of the tripod support structure of an offshore wind turbine (OWT). Four test models were designed, including two models with shear keys and two without shear keys. The reference model with shear keys exhibited much higher axial capacity and ductility than those without shear keys. The model after fatigue cycles had almost the same ultimate capacity as the reference model, though its ductility had deteriorated. Also, four empirical equations recommended by UK, API, DNV 2013 and 2014 standards are discussed. A comparison study shows that the four standards all have some disadvantages. The forms of the API and DNV 2013 equations are not so reasonable, whereas the experimental parameters for the UK and the DNV 2014 equations are incomplete. Thus, a new formula concerning the interface shear strength of grouted connections is proposed to meet a wider range of parameters in engineering practice.

     

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