输电塔扭转响应和扭转等效风荷载的计算方法  

Calculation methods of torsion response and torsion equivalent static wind loading of transmission tower

作　　者：沈国辉[1] 李保珩 郭勇 赵峥 潘峰 SHEN Guo-hui;LI Bao-heng;GUO Yong;ZHAO Zheng;PAN Feng(Institute of Structural Engineering,Zhejiang University,Hangzhou 310058,China;China Energy Engineering Group Zhejiang Electric Power Design Institute Limited Company,Hangzhou 310012,China;China Power Engineering Consulting Group East China Electric Power Design Institute Limited Company,Shanghai 200063,China)

机构地区：[1]浙江大学结构工程研究所,浙江杭州310058 [2]中国能源建设集团浙江省电力设计院有限公司,浙江杭州310012 [3]中国电力顾问集团华东电力设计研究院有限公司,上海200063

出　　处：《浙江大学学报（工学版）》2022年第3期579-589,共11页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51838012,52178511).

摘　　要：针对输电塔的扭转效应,提出顺线路方向扭转响应和扭转等效风荷载的理论计算方法,分析扭转模态和相干函数对扭转响应的影响,进行气弹模型风洞试验以验证计算结果的准确性,给出同时考虑扭转与平动的风振系数计算公式.结果表明:所提出顺线路方向扭转响应计算方法与风洞试验结果非常接近,计算方法的准确性得以验证;扭转响应计算中应同时考虑水平向与竖直向的相干函数;顺横担方向来流时的扭转响应理论计算结果小于风洞试验值,原因是此时杆件间的遮挡效应产生特征湍流;塔身的扭转放大系数可忽略,横担的扭转放大系数不可忽略,最大值为1.1.A theoretical calculating method to deal with the along-line torsion response and torsion equivalent static wind load was proposed aiming to the torsion effect of transmission tower.The influence of different torsion modes and coherence functions on the torsion response was analyzed.Aeroelastic model wind tunnel tests were carried out to justify the theoretical results.The calculating methods of gust loading factors considering both the torsion and translational effects were developed.Results show that calculating results of the along-line torsion responses are coincided well with those of the aeroelastic model tests,indicating the rationality of the proposed methods.The horizontal and vertical coherence functions should both be adopted to obtain the torsion response.When wind blows from the along cross arm direction,the theoretical torsion responses are less than those of the aeroelastic model tests,which is due to the signature turbulence induced by the shielding effect of tower members.The torsion magnified factor(TMF)of tower body is small,whereas the TMF of the cross-arm cannot be ignored in which a factor up to 1.1 can be found.

关 键 词：输电塔 扭转效应 等效风荷载 气弹模型 长横担 

分 类 号：TU312.1[建筑科学—结构工程]