桅杆结构风洞试验研究  

Research on Wind Tunnel Experiment of Guyed Masts

作　　者：王肇民[1] 何艳丽[1] 马星[1] 邓洪洲[1] 颜明忠[1] 

机构地区：[1]同济大学,上海200092

出　　处：《建筑结构学报》2000年第6期55-61,共7页Journal of Building Structures

基　　金：国家自然科学基金(59778030);土木工程防灾国家重点实验室基金(9607)联合资助。

摘　　要：本文介绍了国内首次桅杆结构风洞试验，记录了格构式和单筒式桅杆模型的自振特性和风振响应测试结果。试验结果表明：①桅杆结构的非线性程度随风速的增大而增强；②桅杆结构在风振计算中应考虑多阶振型的影响，随着风速的加大，高振型的贡献增加；③在顺风荷载作用下，桅杆结构可能出现横风共振和混沌现象。This paper introduces a wind tunnel experiment of guyed masts firstly conducted in China. Test results on vibration characteristics and wind induced vibration response of a lattice mast model and a cylinder mast model were recorded. Test results showed that:① the nonlinearity of guyed masts increases as wind velocity rises.② when wind induced vibration of guyed masts is calculated, multi-mode of vibrations should be considered and the contribution of higher rank modes increases as wind velocity increases.③ across-wind vibration and chaos of guyed masts may happen even under along-wind loads.

关 键 词：桅杆结构 风洞试验 非线性动力特性 

分 类 号：TU359.03[建筑科学—结构工程] TU311.3