Wind and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Wind tunnel tests on wind loads acting on steel tubular transmission towers under skewed wind

  • YANG, Fengli (China Electric Power Research Institute) ;
  • NIU, Huawei (Wind Engineering Research Center, Hunan University)
  • Received : 2021.09.22
  • Accepted : 2022.07.25
  • Published : 2022.08.25
⟨ Previous Next ⟩

Abstract

Steel tubular towers are commonly used in UHV and long crossing transmission lines. By considering effects of the model scale, the solidity ratio and the ratio of the mean width to the mean height, wind tunnel tests under different wind speeds on twenty tubular steel tower body models and twenty-six tubular steel cross-arm models were completed. Drag coefficients and shielding factors of the experimental tower body models and cross-arm models in wind directional axis for typical skewed angles were obtained. The influence of the lift forces on the skewed wind load factors of tubular steel tower bodies was evaluated. The skewed wind load factors, the wind load distribution factors in transversal and longitudinal direction were calculated for the tubular tower body models and cross-arm models, respectively. Fitting expressions for the skewed wind load factors of tubular steel bodies and cross-arms were determined through nonlinear fitting analysis. Parameters for skewed wind loads determined by wind tunnel tests were compared with the regulations in applicable standards. Suggestions on the drag coefficients, the skewed wind load factors and the wind load distribution factors were proposed for tubular steel transmission towers.

Keywords

Acknowledgement

The authors sincerely thank the anonymous reviewers for their valuable comments to improve the original version of this manuscript. This work has been funded by Beijing Natural Science Foundation (8214054).

References

  1. AS/NZS 7000 (2010), Overhead Line Design-Detailed Procedures, Australia Limited/Standards New Zealand, Sydney, Austrilian.
  2. ASCE No.74 (1991), ASCE Manuals and Reports on Engineering Practice No.74, American Society of Civil Engineers; Reston, American.
  3. ASCE No.74 (2010), ASCE Manuals and Reports on Engineering Practice No.74, American Society of Civil Engineers, Reston, American.
  4. Bian, R., Lou, W.J., Li, H., Zhao, X.S. and Zhang, L.G. (2019), "Aerodynamic characteristics of steel tubular transmission tower in different flow fields", J. Zhejiang Univ.(Eng. Sci.), 53(5), 910-916. https://dx.doi.org/10.3785/j.issn.1008-973X.2019.05.011.
  5. BS-8100 (1986), Lattice Tower and Masts-Part1: Code of Practice for Loading, British Standards Institution; London, Britain.
  6. Celio, F.C.J., Nicholas, I. and Reyolando, M.L.R.F.B. (2003), "Experimental study of the wind forces on rectangular latticed communication towers with antennas", J. Wind Eng. Ind. Aerod., 91, 1007-1022. https://dx.doi.org/10.1016/S0167-6105(03)00049-7.
  7. Deng, H.Z., Xu, H.J., Duan, C.Y., Jin, X.H. and Wang, Z.H. (2016), "Experimental and numerical study on the responses of a transmission tower to skew incident winds", J. Wind Eng. Ind. Aerod., 157, 171-188. https://dx.doi.org/10.1016/j.jweia.2016.05.010.
  8. Deng, H.Z., Zhang, J.M., Shuai, Q. and Chen, Q. (2010), "Windtunnel investigation on pressure coefficient of steel tubular transmission tower", Power Syst. Technol., 34(9), 190-194. https://dx.doi.org/10.13335/j.1000-3673.pst.2010.09.024.
  9. DL/T 5154-2012 (2012), Technical Code for the Design of Tower and Pole Structures of Overhead Transmission Lines, China Planning Press; Beijing, China (in Chinese).
  10. EN 50341-1 (2003), Overhead Electrical Lines Exceeding AC 45kV, European Committee for Electrotechnical Standardization; Brussels, Belgium.
  11. GB 50009-2012 (2012), Load Code for the Design of Building Structures, China Architecture and Building Press; Beijing, China (in Chinese).
  12. Hadi, S., Karim, A. and Mohammad, R.C. (2021), "Stability behavior of the transmission line system under incremental dynamic wind load", Wind Struct., 33(4), 509-522. https://doi.org/10.12989/was.2021.33.4.289.
  13. Haitham, A., Amal, E., Ayman, E.A. and AshrafEl, D. (2016), "Review on dynamic and quasi-static buffeting response of transmission lines under synoptic and non-synoptic winds", Eng. Struct., 112, 23-36. https://dx.doi.org/10.1016/j.engstruct.2016.01.003.
  14. IEC 60826 (2003), Design Criteria of Overhead Transmission Lines, International Electrotechnical Commission, Geneva, Switzerland.
  15. Ileana, C., Stefano, T., Andrea, F. and Giovanni, S. (2021), "Wind tunnel testing of telecommunication lattice towers equipped with ancillaries", Eng. Struct., 241, 1-13. https://doi.org/10.1016/j.engstruct.2021.112526.
  16. JEC-127-1979 (1979), Design Standards on Structures for Transmissions, Japanese Electrotechnical Committee, Tokyo, Japan.
  17. Li, X.Y., Yao, Y., Wu, H.T., Zhao, B., Chen, B. and Yi, T. (2019), "A review of the transmission tower-line system performance under typhoon in wind tunnel test", Wind Struct., 29(2), 87-98. https://doi.org/10.12989/was.2019.29.2.087.
  18. Mara, T.G. and Ho, T.C.E. (2011), "Design loads for transmission towers under skewed wind loading", Structures Congress 2011, Las Vegas, USA, April.
  19. Schewe, G. (1983), "On the force fluctuations acting on a circular cylinder in crossflow from subcritical up to transcritical Reynolds numbers", J. Fluid Mech., 133, 265-285. https://dx.doi.org/10.1017/S0022112083001913.
  20. Simon, P., Frederic. L. and Sebastien, L. (2018), "Calculation of wind forces on lattice structures made of round bars by a local approach", Eng. Struct, 156, 548-555. https://doi.org/10.1016/j.engstruct.2017.11.065.
  21. Wang, D.H., Li, S., Sun, C., Huang, G.Q. and Yang, Q.S. (2021), "Assessment of wind-induced fragility of transmission towers under quasi-static wind load", Wind Struct., 33(4), 343-352. https://doi.org/10.12989/was.2021.33.4.343.
  22. Yang, F.L. and Niu, H.W. (2021), "Experimental study on drag coefficients and shielding effects of steel tubular members in lattice transmission towers", P. CSEE, 41(10), 3632-3644. https://dx.doi.org/10.13334/j.0258-8013.pcsee.201398.
  23. Yang, F.L. (2017), "Study on skewed wind load factor on crossarms of angle steel transmission towers under skewed wind", Eng. Mech., 34(4), 150-159. https://dx.doi.org/10.6052/j.issn.1000-4750.2015.10.0845.
  24. Yang, F.L., Dang, H.X., Niu, H.W., Zhang, H.J. and Zhu B.R. (2016a), "Wind tunnel tests on wind loads acting on an angled steel triangular transmission tower", J. Wind Eng. Ind. Aerod., 156(9), 93-103. https://dx.doi.org/10.1016/j.jweia.2015.01.012.
  25. Yang, F.L., Yang, J.B., Niu, H.W. and Zhang, H.J. (2015), "Design wind loads for tubular-angle steel cross-arms of transmission towers under skewed wind loading", J. Wind Eng. Ind. Aerod., 140(5), 10-18. https://dx.doi.org/10.1016/j.jweia.2016.07.016.
  26. Yang, F.L., Zhang, H.J., Yang, J.B., Dang, H.X. and Niu, H.W. (2016b), "Shielding effects on the leeward side of high voltage transmission tower bodies under wind load", J. Vib. Eng, 29(2), 276-283. https://dx.doi.org/10.16385/j.cnki.issn.1004-4523.2016.02.12.
  27. Zhang, Q.H., Gu, M. and Huang, P. (2008), "Experiment on wind force on typical superstructures of latticed transmission tower", J. Vib. Shock, 21(5), 452-457. https://dx.doi.org/10.16385/j.cnki.issn.1004-4523.2008.05.011.
  28. Zhou, Q., Zhang, H.J., Ma, B. and Huang, Y. (2019), "Wind loads on transmission tower bodies under skew winds with both yaw and tilt angles", J. Wind Eng. Ind. Aerod., 187, 48-60. https://dx.doi.org/10.1016/j.jweia.2019.01.013.
  29. Ziad, A., Amal, E., Peter, I., Arindam, G.C. and Caesar, A.S. (2021), "Aeroelastic modeling to study the wind-induced response of a self-supported lattice tower", Eng. Struct., 245, 1-14. https://doi.org/10.1016/j.engstruct.2021.112885.