筒网状空间缆索体系的平拉式人行悬索桥的探讨  

Discussion on the Flat Pull Pedestrian Suspension Bridge with Spatial Cable System in Tube-net-shape

作　　者：斯朗拥宗[1] 扎西罗布 Silang Yongzong;Zhaxi Luobu(College of Engineering,Tibet University,Lhasa 850000,China;Research Institute of Traffic Survey and Design of Tibet Autonomous Region,Lhasa 850000,China)

机构地区：[1]西藏大学工学院,拉萨850000 [2]西藏自治区交通勘察设计研究院,拉萨850000

出　　处：《特种结构》2021年第1期65-69,共5页Special Structures

基　　金：西藏经济社会发展与高原科学研究共建创新基金(lzj2020001)

摘　　要：本文依据超大跨径平拉式人行悬索桥的抗风稳定性要求,提出一种筒网状空间缆索体系的平拉式人行景观悬索桥的结构体系,将传统平拉式悬索桥的平行主缆,改进为分散的单叶双曲面空间缆索,提高其自振扭转频率和扭弯频率比。结合西藏某峡谷200m人行景观悬索桥,进行工程参数设计,建立Midas有限元分析模型,开展动力模态分析研究,验证筒网状平拉式人行景观悬索桥抗风稳定性的优越性。According to the requirements of wind resistance stability of super long-span plane pull suspension bridge,one kind of new structure system of plane pull suspension bridge with tube-net-shaped spatial cable system was proposed in this paper.The parallel main cables of traditional plane pull suspension bridges were improved into univalent hyperboloid disperse spatial cables to enhance the torsional vibration frequency and the ratio of torsional frequency and bending frequency.Based on a 200m pedestrian landscape suspension bridge in one gorge in Tibet,the project parameter design was carried out.The MIDAS finite element analysis model was established,and the dynamic modal analysis was carried out to verify the superiority of wind resistance stability of plane pull pedestrian landscape suspension bridge with spatial cable system in tube-net-shape.

关 键 词：人行景观桥 平拉式悬索桥 空间缆索 单叶双曲面 抗风稳定性 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]