海岛环境下大跨越输电塔风荷载关键参数特性研究  

Research on the Characteristics of Main Wind Load Parameters for Long-Span Transmission Tower in Island Environment

作　　者：施力 潘峰[2] 聂建波[3] 陈成[2] 郑剑伟[2] 

机构地区：[1]中国水利水电第四工程局有限公司国际公司,北京100070 [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]国网浙江省电力公司物资分公司,浙江杭州310003

出　　处：《电网与清洁能源》2015年第4期25-31,共7页Power System and Clean Energy

摘　　要：大跨越输电塔是集高耸结构和空间杆系结构2种特征于一体的风敏感结构,风与结构的相互作用十分复杂,风荷载是主要的设计荷载之一。以某一海岛环境大跨越输电塔为研究对象,研究了适用于工程的风速过渡区、风压高度变化系数;结合以往工程经验,提出体型系数的推荐取值;同时,参考国内外规范(IEC60826、BS50341),并通过CFD模拟,得出了塔身与横担角度风荷载的分配系数推荐值;通过研究,揭示了海岛环境下大跨越塔的风荷载关键参数的特性,结果可作为大跨越铁塔结构抗风设计的参考。Due to its complex interactions between wind and structure,the long-span transmission tower belongs to wind-sensitive structures characteristic of high-rising and spatial truss structures,and the wind load is the main problem of the structure design. With a long-span transmission tower in an island as the subject of study, this paper studies the wind transition zone and pressure height variation coefficient. Based on the previous engineering experience,the paper proposes the recommended values of the shape factor. In addition,according to the domestic reference specification(IEC60826 and BS50341)and through CFD simulations,the partition coefficient values of wind loads for the tower-body and the cross-arm are obtained.The study reveals the wind-induced vibration characteristics of the large-crossing tower in the island environment and the results in the paper can be used as reference for the design of large-crossing transmission towers.

关 键 词：大跨越输电塔 风压调整系数 风速过渡区 体形系数 角度风荷载 分配系数 

分 类 号：TU312.1[建筑科学—结构工程] TU347