超大跨径柱式塔斜拉桥结构创新与应用  

Innovation of Super-Long-Span Cable-Stayed Bridge with Columned Pylons and Engineering Practice

作　　者：胡可 王胜斌[2] 王波 汪正兴 HU Ke;WANG Sheng-bin;WANG Bo;WANG Zheng-xing(Anhui Transportation Holding Group Co. , Ltd. , Hefei 230088, China;Anhui Transport Consulting& Design Institute Co. , Ltd. , Hefei 230088, China;State Key Laboratory for Health and Safety of Bridge Structures, Wuhan 430034, China;China Railway Bridge Science Research Institute, Ltd. , Wuhan 430034, China)

机构地区：[1]安徽省交通控股集团有限公司,安徽合肥230088 [2]安徽省交通规划设计研究总院股份有限公司,安徽合肥230088 [3]桥梁结构健康与安全国家重点实验室,湖北武汉430034 [4]中铁大桥科学研究院有限公司,湖北武汉430034

出　　处：《桥梁建设》2021年第4期88-95,共8页Bridge Construction

基　　金：交通运输部企业创新项目(2015315Q20130)。

摘　　要：针对斜拉桥存在的结构体系发展相对滞后、实现超大跨径目标尚存在诸多困难的问题,对柱式塔斜拉桥结构进行了创新。以芜湖长江公路二桥为工程依托,提出了超大跨径斜拉桥分肢菱形柱式塔及四索面分体弧底钢箱梁新型结构,研制了同向回转拉索体系、飘浮体系斜拉桥二维阻尼约束体系,形成了超大跨径柱式塔斜拉桥成套技术。通过计算验证超大跨径柱式塔斜拉桥创新结构的可靠性和稳定性,结果表明:分肢菱形柱式塔及四索面分体弧底钢箱梁新型结构提升了整体结构的受力性能,同向回转拉索体系解决了索塔传统锚索开裂难题,二维阻尼约束体系提高了大跨度桥梁的抗风、抗震性能,实现了顺桥向、横桥向振动的协同控制。It is still critical for the cable-stayed bridge to exceed span limits,and the relatively lagged-behind structural system innovation is one of the reasons counted.In this paper,a kind of cable-stayed structure with columned pylons is innovated.Based on the prototype bridge,the Second Wuhu Changjiang River Highway Bridge,a novel type of super-large-span cable-stayed bridge is created,which is equipped with diamond-shaped pylons containing individual columns and four cable planes.The superstructure consists of twin steel box girders of arc soffit.The looping cable anchorage system and 2D damping restraint system of floating cable-stayed bridge are researched and developed,as a result,a package of technologies for super-long-span cable-stayed bridge with columned pylons is formed.The reliability and stability of the innovative super-long-span cable-stayed bridge with columned pylons is verified by calculation.The results show that the improvements,such as adoption of diamond-shaped pylons,four cable planes and twin steel box girders with arc soffit,enhance the global load bearing performance of the structure.The looping cable anchorage system overcomes the stripping of cables from the pylon.In addition,the 2D damping restraint system raises the wind and seismic resistance of the long-span bridge and allows the cooperative control of the longitudinal and transverse vibrations on bridge.

关 键 词：斜拉桥 超大跨径桥梁 分肢柱式塔 同向回转拉索 四索面分体弧底钢箱梁 二维阻尼约束 桥梁设计 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]