摘要
结合现有景区人行悬索桥的研究和建设情况,首先介绍景区人行悬索桥的特点及应用,其次介绍人行悬索桥的结构分类及受力特点,分别从荷载取值、缆索选用、找形分析、人致振动问题、节点设计和桥面板设计六个方面对人行悬索桥设计的关键技术问题提出归纳和建议。结果表明:主缆和抗风缆可按顺序分别找形,避免同时调整两类缆索;现有规范考虑到的自振频率区间未包含实际频率,已不能满足大跨度人行悬索桥设计的需要,应对大跨度人行悬索桥的频率敏感范围进行研究;吊索与主缆及桥面的连接节点是当前设计中常被忽略的薄弱环节,应根据索内力和应力幅进行节点设计和疲劳验算;最后给出了玻璃桥面板设计的5项建议。
Combined with the research and construction of pedestrian suspension bridge in existing scenic spots,the characteristics and application of pedestrian suspension bridge in scenic spots were introduced first,and then the structural classification and mechanical characteristics of pedestrian suspension bridge were introduced,and the key technical problems of pedestrian suspension bridge design were summed up from six aspects of load valuing,cable selection,form-finding analysis,human-induced vibration,node design and bridge deck design.The results show that:the main cable and wind resistant cable can be respectively shaped in order to avoid adjusting the two kinds of cables at the same time;the natural frequency range considered in the existing specifications does not include the actual frequency,which cannot meet the needs of the design of large-span pedestrian suspension bridge,so the frequency sensitive range of largespan pedestrian suspension bridge should be studied further;the connection node between sling and main cable and the connection node between sling and bridge deck are often ignored in the current design,so the node design and fatigue calculation should be carried out according to the cable internal force and stress amplitude;finally,five suggestions are given for the design of glass bridge deck.
作者
秦格
刘枫
马明
张强
QIN Ge;LIU Feng;MA Ming;ZHANG Qiang(China Academy of Building Research,Beijing 100013,China;National Engineering Research Center of Building Technology,China Academy of Building Research,Beijing 100013,China)
出处
《建筑结构》
CSCD
北大核心
2021年第7期115-120,84,共7页
Building Structure
关键词
大跨度
人行悬索桥
荷载取值
找形分析
人致振动
玻璃桥面
large-span
pedestrian suspension bridge
load valuing
form-finding analysis
human-induced vibration
glass bridge deck
