特高压拉线式悬索塔风洞试验研究  

Wind Tunnel Test on Wind-induced Responses of UHV Cross-rope Suspension Tower-line System

作　　者：李正良[1] 俞登科[1] 肖正直[1] 刘欣鹏[1] 

机构地区：[1]重庆大学土木工程学院,400045

出　　处：《特种结构》2014年第4期22-25,60,共5页Special Structures

摘　　要：拉线式悬索塔由双立柱支撑结构及拉线悬索系统组成,在概念和设计上均较为简洁。然而由于其高耸特点,因此是风敏感结构。为测试该类结构的风振响应特点,进行了塔线体系气动弹性模型的风洞试验。试验结果表明:在紊流风场中,立柱的顺风向风振响应与横风向属于同一量级;随风速增加,背风侧拉线趋向松弛,背风侧立柱受压减小;而迎风侧拉线则越趋张紧,迎风侧立柱受压增加,因此,需特别关注迎风侧拉线断线及迎风侧立柱受压稳定问题。The cross-rope suspension （CRS） tower configuration is simple in both concept and design. It consists of two guyed masts that support the ＂＇cross-rope＂ conductor suspension system. However, it is sensitive to wind loads. An aero-elastic model test was carried out in a boundary layer wind tunnel to investigate the wind induced dynamic responses of the CRS tower-line. The results showed that the magnitude of along-wind response and that of the across-wind response in the turbulent flow was in the same order. The leeward guys tended to be slack and compression on leeward mast decreases when the wind speed increased. Oppositely, the tension in windward guys and compression on windward mast increased with the wind speed enhancement. This may cause the guy rutgture and the dynamic instability of the maxt

关 键 词：拉线式悬索塔 气动弹性模型 风洞试验 风振响应 

分 类 号：TM75[电气工程—电力系统及自动化] TU399[建筑科学—结构工程]