Flexural Tests and Associated Study of a Full-Scale 65-kW Wind Turbine Tower
Publication: Journal of Structural Engineering
Volume 140, Issue 5
Abstract
Full-scale static test to failure was conducted on a 21.9-m-long 65-kW wind turbine tower to evaluate the flexural strength and failure mode. The test was conducted in a displacement-control mode. The flexural limit state in the form of local buckling near the tower base was developed. The buckling occurred in the elastic range because of a high diameter-thickness ratio of the section. Although local buckling caused slight strength degradation, the reduction was not very significant and the recorded response showed a good amount of post-buckling ductility. The local buckling flexural strengths predicted from established standards correlated very well with the measured buckling strength. A parametric finite-element analysis was also conducted. By properly modeling the boundary condition and a local dent on the tower wall, a good correlation of the structural response and failure mode was also achieved. It was found that the ultimate strength and failure mode were sensitive to the boundary condition considered in the model. The presence of a local dent would affect both the location and type of local buckling, although the failure load is less sensitive to local dent.
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Acknowledgments
The authors extend their gratitude to all the organizations, corporations, and individuals who contributed to this investigation and who funded this research (NSF NEES-R Grant No. CMMI 0830422). Oak Creek Energy Systems of Tahachapi, California, donated the turbine tower test specimen.
References
ABAQUS. (2005). ABAQUS standard users manual, Version 6.5, ABAQUS, Pawtucket, RI.
Agbayani, N. A. (2009). “Defects, damage, and repairs subject to high-cycle fatigue: Examples from wind farm tower design.” Proc., Forensic Engineering Congress, ASCE, Reston, VA.
Agbayani, N. A. (2010). “The lack of us structural deign guidelines for wind farm towers: Basic code compliance issues at the high-tech frontier.” Proc., Structures Congress, ASCE, Reston, VA.
Agbayani, N. A., Vega, R. E., and Newell, J. (2011). “Unresolved US code compliance issues for wind energy structures: the need for research.” Proc., Structures Congress, ASCE, Reston, VA.
AISC. (2010). Steel construction manual, 14th Ed., Chicago.
ASCE–American Wind Energy Association (AWEA). (2011). “Recommended practice for compliance of large land-based wind turbine support structures,” Reston, VA and Washington, DC.
ASME. (2006). “Steel stacks.” STS-1-2006, New York.
Bazeos, N., Hatzigeorgiou, G. D., Hondros, I. D., Karamaneas, D., Karabalis, D. L., and Beskos, D. E. (2002). “Static, seismic and stability analyses of a prototype wind turbine steel tower.” Eng. Struct., 24(8), 1015–1025.
Lavassas, G., Nikolaidis, G., Zervas, P., Efthimiou, E., Doudoumis, I. N., and Baniotopoulos, C. C. (2003). “Analysis and design of the prototype of a steel 1-mW wind turbine tower.” Eng. Struct., 25(8), 1097–1106.
Prowell, I., Uang, C. M., Elgamal, A., Luco, J. E., and Guo, L. (2012). “Shake table testing of a utility-scale wind turbine.” J. Eng. Mech., 900–909.
Prowell, I., Veletzos, M., Elgamal, A., and Restrepo, J. (2009). “Experimental and numerical seismic response of a 65 kW wind turbine.” J. Earthquake Eng., 13(8), 1172–1190.
Sim, H. B., Uang, C. M., Prowell, I., and Elgamal, A. (2011). “Flexural test and associated analytical study of a 65-kW full-scale wind turbine tower.”, Dept. of Structural Engineering, Univ. of California–San Diego, La Jolla, CA.
Timoshenko, S. P., and Gere, J. M. (1961). Theory of elastic stability, 2nd Ed., McGraw-Hill, New York.
Ziemian, R. D., ed. (2010). Guide to stability design criteria for metal structures, 6th Ed., Wiley, Hoboken, NJ.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 140 • Issue 5 • May 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 11, 2012
Accepted: Aug 7, 2013
Published online: Aug 10, 2013
Published in print: May 1, 2014
Discussion open until: May 23, 2014
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