UPPER BOUND SOLUTION LIMIT ANALYSIS OF VERTICAL BEARING CAPACITY OF SHALLOW BUCKET FOUNDATION FOR OFFSHORE WIND TURBINES

Wang Jiayu; Liu Run; Chen Guangsi; Yang Xu

doi:10.19912/j.0254-0096.tynxb.2021-0664

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (3) : 294-300. DOI: 10.19912/j.0254-0096.tynxb.2021-0664

UPPER BOUND SOLUTION LIMIT ANALYSIS OF VERTICAL BEARING CAPACITY OF SHALLOW BUCKET FOUNDATION FOR OFFSHORE WIND TURBINES

Wang Jiayu, Liu Run, Chen Guangsi, Yang Xu

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Abstract

The wide and shallow bucket foundation, as a new type of the offshore wind power foundation, is suitable for the soil with many soft clays. And this type of foundation has the characteristic of shore prefabrication, overall floating transportation and overall installation resulting in a good benefit of economy. The calculation of vertical bearing capacity is the basis to realize the composite bearing characteristics of the foundation for offshore wind turbine. Due to the large diameter （D≥30 m） and relatively shallow penetration depth （d≤15 m） compared with the traditional bucket foundation, the vertical failure mechanism and the calculation method of bearing capacity of the new type foundation still need to be studied. The corresponding failure mechanisms are established based on the results of numerical analysis. The upper bound solution limit analysis for vertical bearing capacity was established combined with the virtual work equation, the upper bound solution limit analysis for vertical bearing capacity of bucket foundation is established by using the Matlab mathematical software. And the results of the upper bound solution limit analysis have a good agreement with the calculation of the numerical analysis and the centrifuge test.

Key words

offshore wind turbines / bearing capacity / numerical analysis / bucket foundation / upper bound solution limit analysis

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Wang Jiayu, Liu Run, Chen Guangsi, Yang Xu. UPPER BOUND SOLUTION LIMIT ANALYSIS OF VERTICAL BEARING CAPACITY OF SHALLOW BUCKET FOUNDATION FOR OFFSHORE WIND TURBINES[J]. Acta Energiae Solaris Sinica. 2022, 43(3): 294-300 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0664

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