托坎廷斯河大跨越输电塔风振系数研究  

Study on wind vibration coefficient of large span transmission towers in Tocantins River

作　　者：侯子凡 张俭平 孟祥瑞 Hou Zifan;Zhang Jianping;Meng Xiangrui(China Electricity Council,Beijing 100761,China;China Power Construction Group Shandong Electric Power Construction No.1 Engineering Co.,Ltd.,Jinan 250102,China;School of Civil Engineering and Water Conservancy,Jinan 250061,China)

机构地区：[1]中国电力企业联合会,北京100761 [2]中国电建集团山东电力建设第一工程有限公司,山东济南250102 [3]山东大学土建与水利学院,山东济南250061

出　　处：《山西建筑》2022年第24期62-65,70,共5页Shanxi Architecture

摘　　要：大跨越自立式输电线路在风荷载作用下结构响应规律复杂。基于风速时程模拟理论,考虑平均风与脉动风的叠加效应,编制了风场模拟程序,合成了符合Kaimal目标谱的风速时程。依托实际工程,建立了大跨越输电塔数值模型,开展了该输电塔风振系数研究,对比了不同计算方法下输电塔风振系数分布特点。研究结果表明,频域法计算的风振系数与规范计算结果相近,变化趋势一致;节间高度60 m以下时,时域法计算结果大于规范计算值,高度超过60 m后规范值与时域法相比偏于保守。The structure response law of large span freestanding transmission line under wind load is complex.Based on the simulation theory of wind speed time history and considering the superposition effect of mean wind and pulsating wind,a wind field simulation program is developed in this paper,and the wind speed time history in line with Kaimal target spectrum is synthesized.Based on the actual project,a numerical model of the large span transmission tower is established,and the wind vibration coefficient of the transmission tower is studied.The distribution characteristics of the wind vibration coefficient of the transmission tower under different calculation methods are compared.The results show that the wind vibration coefficient calculated by frequency domain method is close to that calculated by standard method,and the variation trend is consistent.When the internode height is below 60 m,the calculated results of the time-domain method are larger than those of the standard method.When the height is over 60 m,the standard value is more conservative than that of the time-domain method.

关 键 词：输电塔 风振系数 风致响应 数值仿真 

分 类 号：TU347[建筑科学—结构工程]