四肢异形独塔斜拉桥桥塔设计  

Tower Design of Cable-stayed Bridge with Single Tower and Four Special-shaped Limbs

作　　者：胡智敏 丁伟亮 宁鑫淼 曾冬雷 李萌 Hu Zhimin;Ding Weiliang;Ning Xinmiao;Zeng Donglei;Li Meng(Guangdong Architectural Design&Research Institute Co.,Ltd.,Guangzhou 510010,China)

机构地区：[1]广东省建筑设计研究院有限公司,广州510010

出　　处：《特种结构》2024年第2期65-70,共6页Special Structures

摘　　要：邓州市穰城跨湍河大桥为主跨90m+90m的空间框架式独塔钢-混凝土组合梁斜拉桥,主塔采用四肢异形空间框架式独塔,桥塔设计总高75.5m,四根塔柱倾斜角度较大,且上塔柱为空间曲线结构,塔柱受弯、剪、扭效应明显。结合MIDAS Civil对桥塔进行静、动力分析。索塔上采用多种形式的横梁,针对不同位置的横梁选择相对最优的衔接位置、锚固方式来优化设计。总结四肢异形独塔斜拉桥在桥塔设计中遇到的重难点,为类似桥塔设计提供参考。Tuanhe Bridge is a single tower cable-stayed bridge,with a steel-concrete composite spatial frame tower,and with the 90m+90m main span across Tuanhe river in Dengzhou city.The design height of main sin-gle tower is 75.5m,with four special-shaped limbs.The four tower columns have large dip angle,curved top profile,and as a result,significantly higher bending,shear,and torsion effects.Based on MIDAS Civil,static and dynamic analysis were carried out to study the mechanical state of bridge tower.Using a variety of forms beams in cable tower,different cohesion positions,anchoring methods were selected for design optimization.Through the tower design of cable-stayed bridge with single tower and four special-shaped limbs,the main points and difficulties were concluded,and can be referenced by similar bridge tower design.

关 键 词：四肢异形 空间框架式 独塔斜拉桥 桥塔设计 受力分析 

分 类 号：U441[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]