(浙江省电力设计院，杭州 310012)

［摘要］多回路输电塔由于质量与面积沿杆塔高度存在突变，按照规范公式求解风振系数将偏于危险。基于杆塔的集中质量模型，对输电塔风振系数的频域分析方法进行了探讨，推导了考虑背景响应的等效静力风荷载计算公式。通过比较阐明了多回路输电塔风振系数沿塔高的变化特点，分析了背景响应分量对风振系数的影响，并建议在进行多回路输电塔的抗风设计时，采用杆塔多阶振型的CQC组合计算等效风荷载。

［关键词］多回路输电塔；风振系数；等效静力风荷载；集中质量模型

中图分类号：TU392-3, TU357文献标识码：A文章编号：1002-848X(2011)03-0110-04

Wind vibration coefficient of the multiloop transmission towers

Guo Yong, Ye Yin, Ying Jianguo

(Zhejiang Electric Power Design Institute, Hangzhou 310012, China)

Abstract:The standard formula is inapplicable to solve the wind vibration coefficient because the area and mass of the multiloop transmission towers are discontinuity along the height direction. The frequency domain analysis method of the wind vibration coefficient was discussed and the formula of the equivalent static wind load considering the background response had been deduced based on the lumped mass model of the tower. The features of the coefficient along the height were given and the influence of the background response was analyzed. The CQC combination of the multi-mode vectors was proposed to calculate the equivalent wind load in the wind resistance design of the multi-loop transmission towers.

Keywords:multi-loop transmission tower; wind vibration coefficient; equivalent static wind load; lumped mass model

作者简介：郭勇，博士，Email:gy_guoyong@126.com。

参考文献

［1］GB50009—2001 建筑结构荷载规范［S］.北京:中国建筑工业出版社,2002.

［2］郭勇,孙炳楠,叶尹.大跨越输电塔线体系风振响应的时域分析［J］.土木工程学报,2006,39(12):12-17.

［3］DL/T5154—2002 架空送电线路杆塔结构设计技术规定［S］.北京:中国电力出版社,2002.

［4］GB50135—2006 高耸结构设计规范［S］.北京:中国计划出版社,2006.

［5］张相庭.结构风压和风振计算［M］.上海:同济大学出版社,1985.

［6］CLOUGH R W, PENZIEN J. Dynamics of structures［M］. Berkeley: Computers and Structures Inc.,1995.

［7］沈国辉.大跨度屋盖结构的抗风研究［D］.杭州:浙江大学,2004.

［8］林家浩,张亚辉.随机振动的虚拟激励法［M］.北京:科学出版社,2004.

［9］KAREEM A, ZHOU Y. Gust loading factorpast, present and future［J］.Journal of Wind Engineering and Industrial Aerodynamics,2003,91(11):1301-1328.