摘要
贵黔高速鸭池河大桥采用主跨800m的钢桁-混凝土梁混合梁斜拉桥,主跨主梁为正交异性钢桥面板结合钢桁梁,边跨主梁为预应力混凝土边箱梁,主跨钢桁梁与边跨混凝土箱梁间采用钢箱过渡。为明确大跨度混合梁斜拉桥主梁受力特点,确保结构安全,对该桥主梁结构进行整体计算,并对其重点部位进行局部应力分析。计算结果表明:主梁结构整体刚度大,各项设计计算指标均满足规范要求,局部构造受力性能佳;该类型主梁能适应类似的主跨大、边主跨比小的混合梁斜拉桥体系。
The Yachi River Bridge on Guizhou-Qianxi Expressway is a steel truss-concrete composite girder cable-stayed bridge with a main span of 800 m.The main span adopts the steel truss girder covered with orthotropic steel plates and the side spans adopt the prestressed concrete edge box girder.The joint sections between the main span steel truss girder and the side span concrete box girder are the steel box sections.To examine the load bearing behavior of the main girder of the long-span hybrid girder cable-stayed bridge and ensure the structural safety,the overall structure of the main girder was calculated and the local stress analysis was conducted for the key parts.The results of the calculation show that the overall stiffness of the main girder is great,all the design indexes meet the code requirements,and the load bearing capacity of some local details is sound.The main girder of such type is applicable to the hybrid girder cable-stayed structure system with long main span and small main span-to-side span ratio.
出处
《世界桥梁》
北大核心
2016年第4期71-75,共5页
World Bridges
关键词
斜拉桥
钢桁梁
混合梁
正交异性钢桥面板
有限元法
应力
刚度
cable-stayed bridge
steel truss girder
hybrid girder
orthotropic steel deck
finite element method
stress
stiffness
