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http://dx.doi.org/10.7781/kjoss.2013.25.4.421

Analysis of Lateral Behavior of Offshore Wind Turbine Monopile Foundation in Sandy Soil  

Jang, Hwa Sup (Creative Technology Research Team, Korean Register of Shipping)
Kim, Ho Sun (New&Renewable Energy Research Team, Korean Register of Shipping)
Kwak, Yeon Min (New&Renewable Energy Research Team, Korean Register of Shipping)
Park, Jae Hyun (Geotechnical Engineering Research Division, Korea Institute of Construction Technology)
Publication Information
Journal of Korean Society of Steel Construction / v.25, no.4, 2013 , pp. 421-430 More about this Journal
Abstract
To predict behaviors of offshore wind turbines which are highly laterally loaded structures and to design them rationally, evaluating the soil-foundation interaction is important. Nowadays, there are many soil modeling methods for structural analysis of general structures subjected to vertical loads, but using the methods without any consideration for design of a monopile foundation is eschewed because it might cause wrong structural design due to the deferent loading state. In this paper, we identify the differences of the member forces and displacements by design methods. The results show that fixed end method is barely suitable for monopile design in terms of checking the serviceability because it underestimate the lateral displacement. Fixed end method and stiffness matrix method underestimate the member forces, whereas virtual fixed end method overestimates them. The results of p-y curve method and coefficient of subgrade reaction method are similar to the results of 3D soil modeling method, and 2D soil modeling method overestimates the displacement and member forces as compared with other methods.
Keywords
offshore wind turbine; monopile foundation; soil-structure interaction; sandy soil; lateral load-deflection; p-y curve;
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Times Cited By KSCI : 3  (Citation Analysis)
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