异型悬索桥主缆线形设计技术研究  

Study on Main Cable Shape Design of Special-type Suspension Bridge

作　　者：章晗 Zhang Han(Architecture and Engineering Co.,Ltd.,of southeast University,Nanjing 211100,China)

机构地区：[1]东南大学建筑设计研究院有限公司,南京211100

出　　处：《特种结构》2024年第6期76-79,112,共5页Special Structures

摘　　要：针对异型悬索桥的主缆线形设计,通过非线性迭代计算方法,对一座S形双塔三跨异型悬索桥进行了有限元分析。首先进行了初始缆形分析,提出了非线性迭代收敛对初始线形的要求。然后通过迭代计算分析,得到了异型悬索桥精确的成桥缆形与空缆线形,并通过倒拆分析发现了该桥的空缆线形与成桥线形差异巨大。最后通过静动力分析,总结归纳了异型悬索桥的静动力性能,发现了该桥没有明显的整体振动模态,且与跨径相近的常规悬索桥相比振动周期更小桥梁整体刚度更大。A nonlinear iterative calculation was conducted on an S-shaped suspension bridge with couple tower and three-span to solve the design about main cable shape and unloaded cable shape.Firstly,an initial cable shape analysis was conducted,and the requirements for nonlinear iterative convergence on the initial shape were proposed.Then,through iterative calculation and analysis,the precise cable shape and unloaded cable shape of the special-shaped suspension bridge were obtained.And it was found that the unloaded cable shape of the bridge has a huge difference from the completed bridge shape.Finally,through static and dynamic analysis,the static and dynamic performance of the special-shaped suspension bridge was summarized and concluded.It was found that the bridge do not have a significant overall vibration pattern,and compared with conventional suspension bridges of similar span,the vibration period is smaller and the overall stffness of the bridge is greater.

关 键 词：非线性迭代计算 初始缆形 成桥缆形 空缆线形 动力性能 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]