三叶玫瑰形钢管混凝土飞燕式斜拉拱桥设计  

Design of Three Leaf Rose Linear Concrete-Filled Steel Tube(CFST)Flying Swallow Type Cable-stayed Arch Bridge

作　　者：王继林 WANG Jilin(China Design Group Co.,Ltd.,Nanjing 210014,China)

机构地区：[1]华设设计集团股份有限公司,南京210014

出　　处：《现代交通技术》2021年第4期42-46,共5页Modern Transportation Technology

基　　金：江苏省自然科学基金项目(BK2012755)。

摘　　要：依据广西壮族自治区来宾市三江口新区的地形地貌,提出三叶玫瑰形钢管混凝土飞燕式斜拉拱桥的设计方案,其平面正投影为三叶玫瑰图形,拱肋侧立面为尾部翘起的飞燕式斜拉拱造型。三叶玫瑰状空间拱肋之间设置空间拉索,拱脚之间设置系杆拉索,尾部设置斜拉缆索,中间设置桥面吊索悬挂三岔桥面,形成空间缆索体系,使中间拱结构推力和尾部翘起的斜拉拱形桥塔的反方推力互相平衡,形成自平衡结构体系,结构稳定性较好。结合实际工程进行工程参数优化设计,建立MIDAS有限元分析模型,进行内力和模态分析研究,验证三叶玫瑰形钢管混凝土飞燕式斜拉拱桥受力的合理性。According to the landform of Sanjiangkou New Area in Laibin City of Guangxi Zhuang Autonomous Region,a scheme of three leaf rose linear concrete-filled steel tube(CFST)flying swallow type cable-stayed arch bridge is proposed.Its plane positive projection is the three leaf rose line figure,and the side elevation of the arch rib is the tail raised flying swallow type cable-stayed arch shape.Space cables are set between three leaf rose linear space arch ribs,tie cables are set between arch legs,cable-stayed cables are set at the tail,and slings are set in the middle to hang the three fork shaped bridge deck,forming a space cable system,so that the thrust of the middle arch structure and the opposite thrust of the tail up cable-stayed arch bridge tower are mutually balanced,forming a self balanced structure system,with good structural stability.Combined with the actual project,the project parameters are designed,the MIDAS finite element analysis model is established,the inter-nal force analysis and modal analysis are carried out,and the rationality of the three leaf rose linear CFST flying swallow type cable-stayed arch bridge is verified.

关 键 词：三岔桥 钢管混凝土拱桥 飞燕式斜拉拱桥 三叶玫瑰线 空间缆索体系 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]