铁道标准设计2018，Vol.62Issue(5)：53-56,66,5.DOI:10.13238/j.issn.1004-2954.201705300001
高速铁路四线大跨钢桁斜拉桥主桁研究
Research on Main Truss of Long-span Steel Truss Cable-stayed Bridge in Four-line High-speed Railway
范静涛1
作者信息
- 1. 中铁第五勘察设计院集团有限公司桥梁处,北京 102600
- 折叠
摘要
Abstract
Steel truss girder in four-line railway is generally designed with three main trusses at present and the span is generally about 200 m when two main trusses are used. Steel truss girder should be so designed as to adapt to the requirements of minimum line spacing, reduction of total transverse width, lowering of engineering scale of main span,approach span and nearby tunnel and station when two main trusses are in place. Therefore,the research on long-span steel truss cable-stayed bridge with two main trusses bears great significance in engineering. With the consideration of cross section layout and size of the main truss in a long-span steel truss cable-stayed bridge in high-speed railway,the major differences of two-truss and three-truss are studied in terms of structural performance,technical and economic index and project scales of approach spans corresponding to different truss widths,based on which the minimum width of steel truss girder in four-line railway is inferred reasonably. The differences between the triangular truss and the N truss are compared in view of the out-of-plane bending moment of the web member and the steel consumption. Steel truss with 24.3 m width double-truss and triangular web member is employed as the main truss girder. The results show that the steel truss cable-stayed bridge with two main trusses is applicable technically and economically in a bridge with span around 500 m in four-line railway.关键词
高速铁路/铁路桥/斜拉桥/钢桁梁/四线桥/主桁Key words
High speed railway/Railway bridge/Cable-stayed bridge/Steel truss girder/Four-track railway bridge/Main truss分类
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范静涛..高速铁路四线大跨钢桁斜拉桥主桁研究[J].铁道标准设计,2018,62(5):53-56,66,5.
