Load capacity of gravity foundations for wind turbines
DOI:
https://doi.org/10.21703/0718-2813.2008.3.3695Keywords:
bearing capacity, failure envelopes, gravity foundations, wind turbinesAbstract
The present work compares four methods used for foundations design, namely the Danish code, the Eurocode and the US Army's code with the procedures of Meyerhof and Vesic. The comparison is made by means of failure envelopes for a foundation of a offshore wind turbine. Two kinds of soil are considered in the analysis, sand and clay. The envelopes are made considering a constant vertical force, while the horizontal one varies from zero to failure. The results show that for a granular soil all methods converge when large values of horizontal forces are considered. On the contrary, for the case of cohesive soil, only two methods coincide, and the most conservative one is found to be the Vesic method.
References
415 Practice for fundering, (1998). Danmark.
Eurocode, (1992). Geotechnical design – Part 1: General rules.
Hansen J. B. (1970). Bulletin No 28 Geoteknisk Institut, Copenhagen.
Meyerhof, G. (1963). Some recent research on the bearing capacity of foundations. Canadian Geotechnical Journal, Vol 1, pp 16- 31.
Terzaghi, K. (1943). Theoretical Soil Mechanics, John Wiley and Sons, Inc., New York.
U.S. Army corps of Engineers (1992). Bearing Capacity of Soils. Department of the Army, Washington.
Vesic, A. (1973). Analysis of ultimate loads of Shallow Foundations. Journal of soil mechanics and Foundation Division ASCE, 96, Nº SM1.
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