1000kV双回路特高压输电塔顺风向等效静风荷载研究
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摘要
基于高频动态天平测力试验,研究了1000kV双回路特高压输电塔的等效静力风荷载。基于准定常理论和不同高度的脉动风荷载无量纲自功率谱相等的假设,得到了塔身不同高度处的风荷载自谱和互谱。分别计算了输电塔风偏角为0°和90°时的等效背景风荷载、等效共振风荷载和总等效静风荷载,给出了不同高度处的阵风效应因子,可为特高压输电塔的风荷载计算提供依据。
Based on the test of high frequency force balance(HFFB),the equivalent static wind load of 1 000 kV double circuit transmission lines on same tower is researched.According to quasi-steady theory and the assumption that the non-dimensional self-power spectrums of the wind loads in different heights are equal,the self-power spectrums and the cross-power spectrums of the wind load at different heights of tower body are obtained.The equivalent background wind load,the equivalent resonant wind load and total equivalent static wind load of transmission tower under windage yaw angle of 0° and 90° are calculated respectively,and the gust effect factors at different heights under the two windage yaw angles are given.Results of this research are available for reference to wind load calculation of such kinds of transmission towers for UHV power transmission projects.
Based on the test of high frequency force balance(HFFB),the equivalent static wind load of 1 000 kV double circuit transmission lines on same tower is researched.According to quasi-steady theory and the assumption that the non-dimensional self-power spectrums of the wind loads in different heights are equal,the self-power spectrums and the cross-power spectrums of the wind load at different heights of tower body are obtained.The equivalent background wind load,the equivalent resonant wind load and total equivalent static wind load of transmission tower under windage yaw angle of 0° and 90° are calculated respectively,and the gust effect factors at different heights under the two windage yaw angles are given.Results of this research are available for reference to wind load calculation of such kinds of transmission towers for UHV power transmission projects.
引文
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[16]Kasperski M,Niemann H J.The L R C method a general method of estimating unfavorable wind load distributions for linear and non-linear structural behavior[J].Journal of Wind Engineering and Industrial Aerodynamics,1992(43):1753-1763.
[17]顾明,叶丰.高层建筑风致响应和等效静力风荷载的特征[J].工程力学,2006,23(7):93-98.Gu Ming,Ye Feng.Characteristics of wind induced responses and equivalent static wind loads of tall-bulldings[J].Engineering Mechanics,2006,23(7):93-98(in Chinese).
[2]李会知,关罡,吴义章.建筑物风荷载测量技术与动态响应的研究[J].工程力学,2004,21(1):143-147.Li Huizhi,Guan Gang,Wu Yizhang.Measurement of wind load and prediction of dynamic response of buildings in wind tunnel[J].Engineering Mechanics,2004,21(1):143-147(in Chinese).
[3]李会知,樊友景.高层建筑等效静态风荷载的确定[J].建筑结构,2006,36(7):82-84.Li Huizhi,Fan Youjin.Determination of equivalent wind load on high rise building[J].Building Structure,2006,36(7):82-84(in Chinese).
[4]李会知,吴义章,郑冰.高层建筑动态和静态风荷载的确定[J].世界地震工程,2004,20(2):101-105.Li Huizhi,Wu Yizhang,Zheng Bing.Determination of dynamic and static wind load on a high rise building[J].World Earthquake Engineering,2004,20(2):101-105(in Chinese).
[5]李会知,郑冰,张伟.高层建筑风响应及等效静态风荷载的研究[J].郑州大学学报:工学版,2004,25(3):60-64.Li Huizhi,Zheng Bing,Zhang Wei.Study of wind of high-rises and their equivalent static wind load[J].Journal of Zhengzhou University:Engineering Science,2004,25(3):60-64(in Chinese).
[6]顾明,王凤元,全涌,等.超高层建筑风荷载的试验研究[J].建筑结构学报,2000,21(4):48-54.Gu Ming,Wang Fengyuan,Quan Yong,et al.Experimental study on dynamic wind loads on super-tall buildings[J].Journal of Building Structures,2000,21(4):48-54(in Chinese).
[7]顾明,周印,张锋,等.用高频动态天平方法研究金茂大厦的动力风荷载和风振响应[J].建筑结构学报,2000,21(4):55-61.Gu Ming,Zhou Yin,Zhang Feng,et al.Study on wind loads and wind-induced vibration of the Jinmao building using high-frequency-force-balance method[J].Journal of Building Structures,2000,21(4):55-61(in Chinese).
[8]顾明,周印,张锋,等.金茂大厦风致振动的实验研究[J].振动工程学报,2000,13(2):188-193.Gu Ming,Zhou Yin,Zhang Feng,et al.Experimental studies on wind loads and wind induced vibration of jin mao building[J].Journal of Vibration Engineering,2000,13(2):188-193(in Chinese).
[9]李庆祥,孙炳楠,楼文娟,等.高耸异型烟囱结构风压和风振系数试验研究[J].实验力学,2005,20(4):615-622.Li Qinxiang,Sun Bingnan,Lou Wenjuan,et al.Experimentalinvestigation for wind pressure and wind load factor of tall and special shaped chimney[J].Journal of Experimental Mechanics,2005,20(4):615-622(in Chinese).
[10]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,2008,36(2):166-171.Liang Shuguo,Zou Lianghao,Zhao Lin,et al.Analytical model of dynamic wind loads on lattice towers[J].Journal of TongJi University:Natural Science,2008,36(2):166-171(in Chinese).
[11]张亮亮,吴云芳,余洋,等.高层建筑风荷载高频测力天平试验技术[J].重庆大学学报:自然科学版,2006,29(2):99-102.Zhang Liangliang,Wu Yunfang,Yu Yang,et al.Experimental technology on dynamic wind loads on a tall building[J].Journal of Chongqing University:Natural Science Edition,2006,29(2):99-102(in Chinese).
[12]张亮亮,罗声,余洋,等.基于复杂外型建筑物的风振系数[J].重庆大学学报:自然科学版,2006,29(5):96-98.Zhang Liangliang,Luo Sheng,Yu Yang,et al.Research of the coefficient of wind-induced vibration about complicated tall buildings[J].Journal of Chongqing University:Natural Science Edition,2006,29(5):96-98(in Chinese).
[13]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,2007,21(3):76-81.Zou Lianghao,Liang Shuguo.A method to evaluate wind force spectra of semi-rigid model in wind tunnel tests[J].Journal of Experiments in Fluid Mechanics,2007,21(3):76-81(in Chinese).
[14]Katagiri J,Nakamura O,Ohkuma T,et al.Wind-induced lateral-torsional motion of a tall building[J].Journal of Wind Engineering and Industrial Aerodynamics,1992(42):1127-1137.
[15]叶丰.高层建筑顺、横风向和扭转方向风致响应及静力等效风荷载研究[D].上海:同济大学,2004.
[16]Kasperski M,Niemann H J.The L R C method a general method of estimating unfavorable wind load distributions for linear and non-linear structural behavior[J].Journal of Wind Engineering and Industrial Aerodynamics,1992(43):1753-1763.
[17]顾明,叶丰.高层建筑风致响应和等效静力风荷载的特征[J].工程力学,2006,23(7):93-98.Gu Ming,Ye Feng.Characteristics of wind induced responses and equivalent static wind loads of tall-bulldings[J].Engineering Mechanics,2006,23(7):93-98(in Chinese).
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