铁道标准设计2018，Vol.62Issue(6)：61-65,5.DOI:10.13238/j.issn.1004-2954.201707120002
铁路三拱肋简支系杆拱桥设计参数研究
Research on Design Parameters of Simply Supported Tied-Arch Railway Bridge with Three-arch Ribs
李方柯 1苏国明1
作者信息
- 1. 中铁第五勘察设计院集团有限公司,北京 102600
- 折叠
摘要
Abstract
For better understanding of the influence of the three-arch ribs on the mechanical performance of simply supported ties-arch railway bridge,this paper analyzes the main design parameters such as section size of mid-side arches and tie beams,stiffness ratio of the arches and tie beams,reasonable arch shape,brace allocation,tensile force of rod by Finite Element Method with reference to the structural selection and design of a 80 m railway bridge of the same structural system,and suggestions for design parameters values are presented.The results show that the middle arch and tie beam should adopt the same section size;the appropriate value of stiffness ratio of arches to tie beams is 1/12 to 1/4;the reasonable rise-span ratio of arch should be 1/5 to 1/6,and the arch axis should be 1.8 to 2 times of parabola.;the overall structural stability can be benefitted from strengthening braces of mid span and 1/4 span,and the ratio of the tensile force between the middle and the side rods should be reasonably about 1.15.关键词
铁路桥梁/系杆拱/三拱肋/刚度比/矢跨比/拱轴线Key words
Railway bridge/Tied-arch/Three-arch ribs stiffness ratio/Rise-span ratio/Arch axis分类
交通工程引用本文复制引用
李方柯,苏国明..铁路三拱肋简支系杆拱桥设计参数研究[J].铁道标准设计,2018,62(6):61-65,5.
