On-Site Measured Gust Response Factors of Transmission Towers Based on SHM System
Publication: Journal of Aerospace Engineering
Volume 34, Issue 1
Abstract
Many transmission towers have collapsed during typhoon events, and the design wind loads in most current standards consider only the turbulence characteristics of monsoons. The gust response factor (GRF) is a parameter that is directly related to the wind field characteristics, and thus, it is necessary to address GRFs under typhoons to improve the calculation methods of design wind loads. First, the calculation methods of the GRF for transmission towers in various standards are introduced and compared. Then, two operational transmission towers are selected to carry out full-scale measurements, followed by detailed descriptions of a structural health monitoring (SHM) system. Finally, the GRFs are calculated based on on-site measurements during monsoon and three observed typhoon events. The measured results show that a higher turbulence intensity leads to a greater GRF. At low wind speeds, the larger the wind speed, the smaller the GRF; inversely, at high wind speeds, a larger wind speed leads to a greater GRF with a critical wind speed of approximately . Most of the measured GRFs are larger than the standard values, indicating that the current standards underestimate the GRFs of transmission towers. In typhoon-prone areas, the GRF of a transmission tower is recommended to be at least 3.0 to ensure structural safety.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was supported by the National Natural Science Foundation of China (Grant No. 51708089) and the Opening Fund of State Key Laboratory of Green Building in Western China (Grant No. LSKF202012).
References
Aboshosha, H., A. Elawady, A. El Ansary, and A. El Damatty. 2016. “Review on dynamic and quasi-static buffeting response of transmission lines under synoptic and non-synoptic winds.” Eng. Struct. 112 (Apr): 23–46. https://doi.org/10.1016/j.engstruct.2016.01.003.
ASCE Task Committee on Structural Loadings. 2010. Guidelines for electrical transmission line structural loading. 3rd ed. ASCE MOP 74. Edited by C. Jerry Wong and Michael D. Miller. Reston, VA: ASCE.
Bai, H.-F., T.-H. Yi, H.-N. Li, and L. Ren. 2012. “Multisensors on-site monitoring and characteristic analysis of UHV transmission tower.” Int. J. Distrib. Sens. Netw. 8 (11): 545148. https://doi.org/10.1155/2012/545148.
CEN (European Committee for Standards). 2012. Overhead electrical lines exceeding AC 1 kV—Part 1: General requirements—Common specifications. BS EN 50341-1. Brussels, Belgium: CEN.
Chen, X., and A. Kareem. 2004. “Equivalent static wind loads on buildings: New model.” J. Struct. Eng. 130 (10): 1425–1435. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:10(1425).
China Planning Press. 2012. Technical code for the design of tower and pole structures of overhead transmission line. DL/T5154-2012. Beijing: China Planning Press.
Davenport, A. G. 1961. “The application of statistical concepts to the wind loading of structures.” Proc. Inst. Civ. Eng. 19 (4): 449–472. https://doi.org/10.1680/iicep.1961.11304.
Davenport, A. G., and B. F. Sparling. 1992. “Dynamic gust response factors for guyed towers.” J. Wind Eng. Ind. Aerodyn. 43 (1–3): 2237–2248. https://doi.org/10.1016/0167-6105(92)90662-T.
Elawady, A., H. Aboshosha, A. E. Damatty, G. Bitsuamlak, H. Hangan, and A. Elatar. 2017. “Aero-elastic testing of multi-spanned transmission line subjected to downbursts.” J. Wind Eng. Ind. Aerodyn. 169 (Oct): 194–216. https://doi.org/10.1016/j.jweia.2017.07.010.
Fu, X., H.-N. Li, G. Li, and Z.-Q. Dong. 2020. “Fragility analysis of a transmission tower under combined wind and rain loads.” J. Wind Eng. Ind. Aerodyn. 199 (Apr): 104098. https://doi.org/10.1016/j.jweia.2020.104098.
Fu, X., H.-N. Li, L. Tian, J. Wang, and H. Cheng. 2019. “Fragility analysis of a transmission line subjected to wind loading.” J. Perform. Constr. Facil. 33 (4): 04019044. https://doi.org/10.1061/(ASCE)CF.1943-5509.0001311.
Harikrishna, P., J. Shanmugasundaram, S. Gomathinayagam, and N. Lakshmanan. 1999. “Analytical and experimental studies on the gust response of a 52 m tall steel lattice tower under wind loading.” Comput. Struct. 70 (2): 149–160. https://doi.org/10.1016/S0045-7949(98)00156-4.
Holmes, J. D. 1994. “Along-wind response of lattice towers. Part I: Derivation of expressions for gust response factors.” Eng. Struct. 16 (4): 287–292. https://doi.org/10.1016/0141-0296(94)90069-8.
Holmes, J. D. 1996. “Along-wind response of lattice towers. Part II: Aerodynamic damping and deflections.” Eng. Struct. 18 (7): 483–488. https://doi.org/10.1016/0141-0296(95)00131-X.
Hua, X. G., Z. Q. Chen, J. B. Yang, H. W. Niu, and B. Chen. 2014. “Turbulence integral scale corrections to experimental results of aeroelastic models with large geometric scales: Application to gust loading factor of a transmission line tower.” Adv. Struct. Eng. 17 (8): 1189–1197. https://doi.org/10.1260/1369-4332.17.8.1189.
IEC (International Electrotechnical Commission). 2003. Design criteria of overhead transmission lines. IEC 60826. Geneva: IEC.
Kareem, A., and Y. Zhou. 2003. “Gust loading factor—Past, present and future.” J. Wind Eng. Ind. Aerodyn. 91 (12–15): 1301–1328. https://doi.org/10.1016/j.jweia.2003.09.003.
Kasperski, M. 1992. “Extreme wind load distributions for linear and nonlinear design.” Eng. Struct. 14 (1): 27–34. https://doi.org/10.1016/0141-0296(92)90005-B.
Lin, W. E., and E. Savory. 2006. “Large-scale quasi-steady modelling of a downburst outflow using a slot jet.” Wind Struct. 9 (6): 419–440. https://doi.org/10.12989/was.2006.9.6.419.
Okamura, T., T. Ohkuma, E. Hongo, and H. Okada. 2003. “Wind response analysis of a transmission tower in a mountainous area.” J. Wind Eng. Ind. Aerodyn. 91 (1–2): 53–63. https://doi.org/10.1016/S0167-6105(02)00322-7.
Piccardo, G., and G. Solari. 2000. “3D wind-excited response of slender structures: Closed form solution.” J. Struct. Eng. 126 (8): 936–943. https://doi.org/10.1061/(ASCE)0733-9445(2000)126:8(936).
Piccardo, G., and G. Solari. 2002. “3D gust effect factor for slender vertical structures.” Probab. Eng. Mech. 17 (2): 143–155. https://doi.org/10.1016/S0266-8920(01)00034-0.
Sharma, R., and P. Richards. 1999. “A re-examination of the characteristics of tropical cyclone winds.” J. Wind Eng. Ind. Aerodyn. 83 (1): 21–33. https://doi.org/10.1016/S0167-6105(99)00058-6.
Solari, G. 1983. “Analytical estimation of the alongwind response of structures.” J. Wind Eng. Ind. Aerodyn. 14 (1–3): 467–477. https://doi.org/10.1016/0167-6105(83)90047-8.
Solari, G. 2018. “Gust buffeting of slender structures and structural elements: Simplified formulas for design calculations and code provisions.” J. Struct. Eng. 144 (2): 04017185. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001949.
Takeuchi, M., J. Maeda, and N. Ishida. 2010. “Aerodynamic damping properties of two transmission towers estimated by combining several identification methods.” J. Wind Eng. Ind. Aerodyn. 98 (12): 872–880. https://doi.org/10.1016/j.jweia.2010.09.001.
Tamura, Y., and A. Kareem. 2013. Advanced structural wind engineering. New York: Springer.
Wang, D., Q. Shen, D. Zhang, and K. Li. 2018. “Numerical calculation and specifications comparison of wind-induced vibration coefficient for wind load of transmission tower.” Build. Struct. 48 (13): 49–56. https://doi.org/10.19701/j.jzjg.2018.13.010.
Zhang, M., G. Zhao, L. Wang, and J. Li. 2017. “Wind-induced coupling vibration effects of high-voltage transmission tower-line systems.” Shock Vibr. 2017: 1205976. https://doi.org/10.1155/2017/1205976.
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Published In
Journal of Aerospace Engineering
Volume 34 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Mar 12, 2020
Accepted: Aug 5, 2020
Published online: Oct 29, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 29, 2021
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