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- Title
公铁混合布置大跨度斜拉桥主梁断面形式研究 --以赣江公铁大桥西支主桥设计为例
- Authors
郭安娜; 王新国; 崔苗苗; 周 刚
- Abstract
Combining with the constructing of the main bridge of the west branch of the Ganjiang Railway Bridge, this article designed a main beam section that adapts to the 8-lane highway on the upper layer and the symmetric double-track railway+4-lane highway on the lower layer. Four beam section schemes are proposed: steel box-truss composite girder of double-cable-surface with cantilever arm, steel box-truss composite girder of single-cable-surface with cantilever arm, rectangular steel box-truss composite girder, rectangular steel truss girder. Based on the finite element model, the static and dynamic performance and stress characteristics of each scheme are analyzed. The structural characteristics of the scheme, technical indicators, project quantity, road and railway operation safety, landscape effects, etc. are taken into consideration. Steel box-truss composite girder of double-cable-surface with cantilever arm is adopted. Based on the finite element analysis, two cable-beam anchoring forms of anchor pull plate and steel anchor box are compared. It is determined that the stay cable anchored on both sides of the lower steel box girder with a maximum cable force of 16 000 kN adopts the form of steel anchor box with reasonable force, low stress level and good economy. The steel box-truss composite girder of double-cable-surface with cantilever arm which has reasonable deck space layout, low road-rail traffic interference, minimal vertical deformation of beam ends, and good economy suitable for the mixed layout of highway and railway long-span cable-stayed bridge.
- Publication
Railway Standard Design, 2024, Vol 68, Issue 1, p96
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202206060003