跨水库大跨度中承式钢箱拱桥稳定性分析——以新滩溪特大桥为例  

Stability Analysis of Long-span Half-through Steel Box Arch Bridge across Reservoir——Taking Xintanxi Bridge as an Example

作　　者：陈钰 马波 何烽 何春伟 谢光莹 Chen Yu;Ma Bo;He Feng;He Chunwei;Xie Guangying(The Third Engineering Co.,Ltd.of China Railway Seventh Group,Xi'an,Shaanxi 710032)

机构地区：[1]中国中铁七局集团第三工程有限公司,陕西西安710032

出　　处：《工程技术研究》2022年第10期15-17,共3页Engineering and Technological Research

摘　　要：新滩溪特大桥为跨径170 m的中承式钢箱拱桥,拱肋采用单箱单室钢箱截面。为了研究大跨度中承式钢箱拱桥的稳定特性,文章采用midas Civil建立了该拱桥的三维有限元模型,分别研究了恒载和恒载+活载组合下拱桥关键部位的受力特性,并对其各关键部位的安全性及稳定性做了相应的评价。通过数值计算研究,可进一步认识大跨度中承式钢箱拱桥的受力特征,所得结论可为同类型桥梁的设计提供参考。Xintanxi Bridge is a half-through steel box arch bridge with a span of 170 m.Its arch rib adopts a single-box single-chamber steel box section.In order to study the stability characteristics of the long-span half-through steel box arch bridge,this paper uses midas Civil to establish a 3D finite element model of the arch bridge.The stress characteristics of the key parts of the arch bridge under dead load and dead load+live load are studied,and the safety and stability of its key parts are evaluated accordingly.Through numerical calculation,the stress characteristics of long-span halfthrough steel box arch bridge can be further understood,and the conclusions can provide references for the design of similar bridges.

关 键 词：钢箱拱桥 有限元 主梁受力 拱肋受力 吊杆受力 横撑受力 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]