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| Experimental Study of Wind Force on Occluded Latticed Tower |
| LI Zheng-liang1,2，LIU Xin-peng1，YAN Zhi-tao1，2，XIAO Zheng-zhi1，2，YU Deng-ke1 |
1.School of Civil Engineering，Chongqing University，Chongqing 400045，China；
2.Key Laboratory of New Technology for Construction of Cities in Mountain Area（Chongqing University），Ministry of Education，Chongqing 400045，China |
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Abstract Based on high-frequency-force-balance technique, a model of occluded latticed tower was tested in wind tunnel under the conditions of 3 kinds of wind speed, and 6 kinds of occluding distances to investigate the mean force coefficients and power spectrum densities(PSDs) of the base moment. In light of these results, the analytical models of PSD of the base moment in two directions were established by applying least-square method. It is found that, concerning occluding distance and wind speed, occluding distance is more important element of affecting the mean force coefficients. However, wind speed is more important than occluding distance element for PSD of base moment；The analytical models of PSD of the base moment are in good agreetment with the experimental results obtain by wind tunnel tests, which can be used in the evaluation of wind-induced dynamic responses of occluded latticed tower in frequency domain.
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Received: 10 March 2014
Published: 15 June 2015
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[1] 于秀雷，梁枢果，邹良浩. 格构式塔架顺风向风振响应简化计算[J]. 华中科技大学学报(城市科学版)，2006(S2): 8-10.
YU Xiu-lei, LIANG Shu-guo, ZOU Liang-hao. Along-wind Dynamic Responses of Lattice Towers[J]. Journal of Huazhong University of Science and Technology, 2006(S2): 8-10
[2] Liang Shu-guo, Zou Liang-hao, Zhao Lin, et al. The Generalized Force Spectrum of Along-wind Loads on Lattice Towers[A]. Proceedings of the Sixth Asia-Pacific Conference on Wind Engineering[C]. Soul, Korea, 2005, 943-952.
[3] 李正良，肖正直，韩枫，等. 1000kV汉江大跨越特高压输电塔线体系气动弹性模型的设计与风洞试验[J].电网技术，2008(12):1-5.
LI Zheng-liang, XIAO Zheng-zhi, HAN Feng, YAN Zhi-tao. Aeroelastic Model Design and Wind Tunnel Tests of 1000 kV Hanjiang Long Span Transmission Line System[J]. Power System Technology, 2008(12):1-5.
[4] 梁枢果，邹良浩，赵林，等. 格构式塔架三维动力风荷载的风洞试验研究[J]. 空气动力学学报，2007(03): 311-318+329.
LIANG Shu-guo, ZOU Liang-hao, ZHAO Lin, et al.The investigation of 3-D dynamic wind loads on lattice towers by wind tunnel test[J]. Acta Aerodynamica Sinica，2007(03): 311-318+329.
[5] Holmes J D. Along-wind responses of lattice tower: part I-derivation of expressions for gust response factors[J]. Engineering Structures, 1994, 16(4): 287.
[6] Holmes J D. Along-wind responses of lattice tower: part aerodynamics damping and deflections[J]. Engineering Structures, 1996, 18(7): 483.
[7] Holmes J D. Along-wind responses of lattice tower: part-effective load distributions[J]. Engineering Structures, 1996, 18(7): 489.
[8] Bayar D C. Drag coefficients of latticed towe-rs[J]. Journal of Structural Engineering, 1986, 112(2):417-430.
[9] Jr CFC, Isyumov N, Brasil R M L R F. Experimental study of the wind forces on rectangular latticed communication towers with antennas[J]. Journal of Wind Engineering and Industrial Aerodynamics,2003,(91):1007-1022.
[10] M.J.Glanville, K. C. S. Kwok. Dynamic charac-teristics and wind induced responses of a steel frame tower[J]. Journal of Wind Engineering and Industrial Aerodynamics,1995(54/55):133.
[11] Ballio G, Meberini F, Solari G. A 60 year old 100m high steel tower: limit states under win-d actions[J]. Journal of Wind Engineering and Industrial Aerodynamics,1992( 43):2120.
[12] 楼文娟，孙炳楠，唐锦春. 高耸格构式结构风振数值分析及风洞试验[J]. 振动工程学报, 1996, 9(3):318.
LOU Wen-juan, SUN Bing-nan, TANG Jinc-hun. Wind tunnel test and numerical computation on wind-induced vibration for tall lattice tower[J] Chinese Journal of Vibration Engineering, 1996, 9(3):318.
[13] 梁枢果. 输电塔-线体系的气弹模型风洞实验与动力特性、风振响应分析[R].上海：同济大学土木工程防灾国家重点实验室，2002.
LIANG Shu-guo.Wind tunnel test of aero-elastic model and dynamic characters,wind induced responses for transmission tower line system[R]. Shanghai:Tongji University. State Key Laboratory for Disaster Reduction in Civil Engineering,2002.
[14] 邹良浩,梁枢果.半刚性模型风洞试验荷载谱的处理方法[J].实验流体力学，2007(03):76-81.
ZOU Liang-hao，LIANG Shu-guo. A method to evaluate wind force spectra of semi-rigid model in wind tunnel tests[J]. Journal of Experiments in Fluid Mechanics，2007(03):76-81.
[15] 梁枢果,邹良浩,赵林,等.格构式塔架动力风荷载解析模型[J]. 同济大学学报(自然科学版)，2008(02):166-171.
LIANG Shu-guo，ZOU Liang-hao，ZHAO Lin，et al. Analytical Model of Dynamic Wind Loads on Lattice Towers[J]. Journal of Tongji University(Natural Science)，2008(02):166-171.
[16] Architectural Institute of Japan. AIJ Recomm-endations for Loads on Building[S].2004.
[17] British Standard BS8100:1986. Latticed towers and mast，Part1，Code of Practice for Loading[S].
[18] ASCE 7-02 Minimum Design Loads for Buil-dings and Other Structures[S].
[19] Australia/New Zealand Standard AS/NZS1170.2-2002. Minimum Design Loads on Structures part2: Wind Loads[S].
[20] IS.875-1987. Indian Standard Code of Practice for Design Loads(other than Earthquake)for Bui-ldings and Structures. Part 3-Wind Loads[S].
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