Wind and Structures

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Scale model experimental of a prestressed concrete wind turbine tower

  • Ma, Hongwang (Department of Civil Engineering, Shanghai Jiaotong University) ;
  • Zhang, Dongdong (Department of Civil Engineering, Shanghai Jiaotong University) ;
  • Ma, Ze (Department of Civil Engineering, Shanghai Jiaotong University) ;
  • Ma, Qi (Department of Civil Engineering, Shanghai Jiaotong University)
  • Received : 2014.12.09
  • Accepted : 2015.09.17
  • Published : 2015.09.25
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Abstract

As concrete wind-turbine towers are increasingly being used in wind-farm construction, there is a growing need to understand the behavior of concrete wind-turbine towers. In particular, experimental evaluations of concrete wind-turbine towers are necessary to demonstrate the dynamic characteristics and load-carrying capacity of such towers. This paper describes a model test of a prestressed concrete wind-turbine tower that examines the dynamic characteristics and load-carrying performance of the tower. Additionally, a numerical model is presented and used to verify the design approach. The test results indicate that the first natural frequency of the prestressed concrete wind turbine tower is 0.395 Hz which lies between frequencies 1P and 3P (0.25-0.51 Hz). The damper ratio is 3.3%. The maximum concrete compression stresses are less than the concrete design compression strength, the maximum tensile stresses are less than zero and the prestressed strand stresses are less than the design strength under both the serviceability and ultimate limit state loads. The maximum displacement of the tower top are 331 mm and 648 mm for the serviceability limit state and ultimate limit state, respectively, which is less than L/100 = 1000 mm. Compared with traditional tall wind-turbine steel towers, the prestressed concrete tower has better material damping properties, potential lower maintenance cost, and lower construction costs. Thus, the prestressed concrete wind-turbine tower could be an innovative engineering solution for multi-megawatt wind turbine towers, in particular those that are taller than 100 m.

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References

  1. Anil K. Chopra (2001), Dynamics of Structures Theory and Applications to Earthquake Engineering, (2nd Ed.), Prentice Hall Inc, New Jersey, USA.
  2. ABAQUS Analysis User's Manual (2006), SIMULIA.
  3. Cajka Radim (2013), "Analysis of prestressed concrete tower for wind turbine generator", Adv. Mater. Res., 772, 622-629. https://doi.org/10.4028/www.scientific.net/AMR.772.622
  4. Design code (2010), GB 50010-2010, Code for Design of concrete structures, Beijing, China.
  5. Design code (2012), GB 5009-2012, Load code for the design of building structures, Beijing, China.
  6. Design code (2010), GB 50011-2010, Code for Seismic Design of Buildings. Beijing, China.
  7. Design code (2011), GB 50017-2011, Code for design of steel structures, Beijing, China.
  8. Eize, V.D. (2012), "Concrete-steel hybrid tower from ATS", Renew. Energy World, 5, 109-112.
  9. Ibrahim Lotfy (2012), Prestressed concrete wind turbine supporting system, Master Dissertation, University of Nebraska, Lincoln.
  10. Islam, M.R., Mekhilef, S. and Saidur, R. (2013), "Progress and recent trends of wind energy technology", Renew. Sust. Energ. Rev., 21, 456-468. https://doi.org/10.1016/j.rser.2013.01.007
  11. Jorge, J. (2012), "Concrete towers for Multi-Megawatt turbines", Wind Systems, 2, 1-6.
  12. Kenna, A. and Basu, B. (2014), "A finite element model for pre-stressed or post-tensioned concrete wind turbine towers", Wind Energy, DOI: 10.1002/we.1778.
  13. Lanier, M.W. (2005), Evaluation of design and construction approaches for economical Hybrid steel/concrete wind turbine towers, Technical Report. Golden: National Renewable Energy Laboratory.
  14. Ma, H.W. and Meng R. (2014), "Optimization design of prestressed concrete wind turbine tower", Sci. China Technol. Sci., 57(1), 1-9. https://doi.org/10.1007/s11431-013-5425-9
  15. Marruth Elsey Priebe (2014), "A tower order: cost-effective 100+meter wind turbine towers", http://bit.ly/turbinetowers.
  16. Paredes, J.A., Barbat, A.H. and Oller, S. (2011), "A compression-tension concrete damage model, applied to a wind turbine", Eng. Struct., 33(12), 3559-3569. https://doi.org/10.1016/j.engstruct.2011.07.020
  17. Quilligan, A., O'Connor, A. and Pakrashi, V. (2012), "Fragility analysis of steel and concrete wind turbine towers", Eng. Struct., 36, 270-282. https://doi.org/10.1016/j.engstruct.2011.12.013
  18. Souid, A., Delaplace, A., Ragueneau, F. and Desmorat, R. (2009), "Pseudodynamic testing and nonlinear substructuring of damaging structures under earthquake loading", Eng. Struct., 31(5), 1102-1110. https://doi.org/10.1016/j.engstruct.2009.01.007
  19. Tricklebank, A.H. and Halberstadt, P.H. (2007), Concrete towers for onshore and offshore wind farms, Technical Report, Camberlery: the Concrete Center, Surrey.
  20. Tower Construction. Enercon Energy for the World (2014), http://www.enercon.de/en-en/755.htm.