阻尼比对输电塔风荷载的影响  

Influence of Damping Ratio on Wind Load of Transmission Tower

作　　者：段成荫[1] 张尔乐 韩金林 李金源 赵峥[1] DUAN Chengyin;ZHANG Erle;HAN Jinlin;LI Jinyuan;ZHAO Zheng(CPECC East China Electric Power Design Institute, Shanghai 20001 ,China;State Grid AC Engineering Construction Company, Beijing 100052, China;State Grid Qingdao Power Supply Company, Qingdao 250003, China;State Grid Zibo Power Supply Company,Zibo 255000, China)

机构地区：[1]华东电力设计院有限公司,上海200001 [2]国家电网公司交流建设分公司,北京100052 [3]国网山东省电力公司青岛供电公司,山东青岛266002 [4]国网山东省电力公司淄博供电公司,山东淄博255000

出　　处：《山东电力技术》2018年第3期34-38,共5页Shandong Electric Power

摘　　要：阻尼比是输电塔结构风振响应计算中的重要参数,直接决定风振系数乃至风荷载的取值,进而影响输电塔结构工程造价。通过比较各国荷载规范对阻尼比取值的规定,结合若干输电铁塔工程实例详细分析不同阻尼比取值对输电塔结构风荷载的影响。结果表明,相比国际上其他规范,我国建筑结构荷载规范对于阻尼比的取值较小,阻尼比的变化对高塔影响较大,对矮塔影响较小,对基底弯矩的影响比对基底剪力的影响大。The damping ratio is an important parameter in calculation of wind-induced vibrations of transmission towers.It can directly determine the wind-induced vibration coefficient even the value of wind load,thereby affecting the cost of transmission tower structure engineering.In this study,the specifications about damping ratios in international codes and standards are presented and compared.Based on some typical engineering practices,the influence of the damping ratio on the wind loads of transmission towers is discussed in detail.Results show that compared to foreign codes and standards,the value of damping ratio specified in Chinese load code is relatively small.The change of damping ratio will have more significant influence on tall towers rather than short tower,and damping ratio will affect the base moments more greatly than the base shear forces.

关 键 词：输电塔 荷载规范 风荷载 阻尼比 

分 类 号：TM753[电气工程—电力系统及自动化]