The force balance wind tunnel testing method was employed to obtain the shape coefficients of lattice tubular towers in the subcritical regime. Then, the variation characteristic of the shape coefficients of the tower versus the solidity ratio is analyzed. The Reynolds number reduction coefficient of the lattice tubular tower from the subcritical regime to the supercritical regime is fitted based on the data of the codes. Finally, the shape coefficients of the lattice tubular tower obtained from the wind tunnel tests are compared with those regulated in the codes. Experimental results show that the shape coefficient of the cross-arm is larger than that of the tower body under the same solidity ratio, because the rod of cross-arm has a higher slenderness ratio and the equivalent spacing between front and back surfaces is larger. In the subcritical regime, the shape coefficient of the tower body is close to that specified in the JEC-TR-00007—2015、DL/T 5551—2018 、GB 50009—2012 codes, whereas the shape coefficient of the cross-arm is larger than that specified in the codes. The shape coefficients of the lattice tubular tower regulated in various countries’ codes decrease with the increase of the solidity ratio in the subcritical and supercritical regimes. Then, the reduction coefficient of Reynolds number is obtained as 0.63+0.72 using the least square fitting method. In the supercritical regime, the shape coefficients of the tower body are close to that specified in the DL/T 5551—2018 and GB 50009—2012 codes, and the shape coefficients of the cross-arm are close to that specified in the IEC 60826—2017 and ASCE MOP 74—2020 codes.
ZHANGH J, HUANGY, ZHOUQ .Wind tunnel tests for wind loads on a tubular transmission tower via multi-balance synchronous force measurement[J].Journal of Vibration and Shock, 2019, 38(22): 137-143.(in Chinese)
SHENG H, XIANGG T, GUOY,et al .Research on body shape coefficients of wind loads on steel transmission towers with cylindrical members[J].Special Structures, 2015, 32(5): 62-65.(in Chinese)
[7]
SIMIUE, SCANLANR H .Wind effects on structures:fundamentals and applications to design[M].3rd ed.New York:John Wiley,1996.
[8]
SYKESD M .Lattice frames in turbulent airflow[J].Journal of Wind Engineering and Industrial Aerodynamics,1981,7(2):203-214.
[9]
BALCZÓM, GORICSÁNI, KOVÁCST,et al .Prediction of wind load acting on telecommunication masts[C]//IABSE Symposium,Budapest 2006:Responding to Tomorrow’s Challenges in Structural Engineering.Budapest,Hungary.Zurich,Switzerland:International Association for Bridge and Structural Engineering (IABSE), 2006: 23-30.
[10]
WOODG S. Wind loading of telecommunication antennas and head frames[R]. Sydney: The University of Sydney, 2007.
[11]
ZHOUQ, ZHANGH J, MAB,et al .Wind loads on transmission tower bodies under skew winds with both yaw and tilt angles[J].Journal of Wind Engineering and Industrial Aerodynamics, 2019,187: 48-60.
[12]
SHENG H, YAOJ F, CHENY,et al .Experimental study of wind loads on tubular crossarms of transmission towers[J].Journal of Structural Engineering, 2023, 149(3): 04022257.
[13]
GEORGAKISC T, STOTTRUP-ANDERSENU, JOHNSENM, et al. Drag coefficients of lattice masts from full-scale wind-tunnel tests[C]//Proceedings of 5th European and African Conference on Wind Engineering. Florence: Firenze University Press. 2009.
SUNY, MAR L, QIUX .Wind tunnel investigation on wind load characteristics of triangular guyed mast[J].Journal of Hunan University (Natural Sciences),2017,44(1): 39-46.(in Chinese)
NIUH W, LIUG B, YANGF L,et al .Wind tunnel tests on shape coefficient and shielding factor of members for tubular-angle steel transmission tower[J].Journal of Hunan University (Natural Sciences), 2021, 48(11): 44-53.(in Chinese)
[18]
PEZOM L, BAKIĆV V .Numerical determination of drag coefficient for guyed mast exposed to wind action[J]. Engineering Structures,2014,62/63:98-104.
CHENGZ J, FUG H, LOUW J,et al . Research for the wind force on high-rise latticed tower[J].Journal of Experimental Mechanics, 2000, 15(1): 51-55.(in Chinese)
[21]
郭勇 .大跨越输电塔线体系的风振响应及振动控制研究[D].杭州: 浙江大学, 2006.
[22]
GUOY .Studies on wind-induced dynamic response and vibration control of long span transmission line system[D].Hangzhou:Zhejiang University,2006.(in Chinese)
[23]
架空输电线路荷载规范: DL/T 5551—2018 [S].北京:中国计划出版社,2018.
[24]
Load code for the design of overhead transmission line: DL/T 5551—2018 [S]. Beijing:China Planning Press,2018.(in Chinese)
[25]
建筑结构荷载规范: GB 50009—2012 [S].北京:中国建筑工业出版社, 2012.
[26]
Load code for the design of building structures:GB 50009—2012 [S].Beijing:China Architecture & Building Press,2012.(in Chinese)
[27]
Design standards on structures for transmissions: JEC-TR- 00007—2015 [S]. Tokyo:Japanese Electrotechnical Committee,2015.
[28]
Eurocode 3-design of steel structures-Part 3-1:towers,masts and chimneys:EN 1993-3-1:2006 [S]. Brussels:European Committee for Standardization, 2010.
[29]
Lattice towers and mast:part 1:code of practice for loading:BS 8100-1:1986 [S]. London:British Standards Institution, 2005.
[30]
Lattice structures:part 2:mean fluid forces on tower-like space frames: ESDU 81028d [S]. London: Engineering Sciences Data Unit,2000.
Guidelines for electrical transmission line structural loading:A SCE MOP 74―2020 [S].New York:American Society of Civil Engineers, 2020.
[33]
Overhead transmission lines-design criteria:IEC 60826—2017 [S]. Geneva: The International Electrotechnical Commission, 2017.
[34]
LIY, LIZ L, SAVORYE,et al .Wind tunnel measurement of overall and sectional drag coefficients for a super high-rise steel tube transmission tower[J].Journal of Wind Engineering and Industrial Aerodynamics, 2020, 206: 104363.