铁道标准设计2018，Vol.62Issue(4)：92-96,5.DOI:10.13238/j.issn.1004-2954.201710100004
大跨度双线铁路混凝土桥极限跨径的研究
Research on Ultimate Span of Concrete Railway Bridges on Double-track Railways
摘要
Abstract
Pre-stressed concrete bridges are widely used in the construction of long span railway bridges in China, but few researches have been conducted on the spanning capacity and reasonable application range of different bridge types. According to design practices, the spanning capacity is generally controlled by the shear strength of the section near the pier. The theoretical ultimate span of railway PC girder bridges is analyzed when the shear stress generated by load is equal to the allowable shear stress of concrete. Based on the analysis results of girder bridges and load distribution between the girder and the stiffen structure, the theoretical ultimate span of girder-arch hybrid bridges and extradosed bridges are obtained. The results are approximately conformed to the actual engineering. Practical engineering ultimate spans are proposed according to the theoretical values, and the results are applicable for the technical and economic comparison of different bridge types.关键词
铁路桥/预应力混凝土桥/梁式桥/梁-拱组合桥/部分斜拉桥/极限跨径Key words
Railway bridges/Pre-stressed concrete bridge/Girder bridge/Girder-arch hybrid bridge/Extradosed bridge/Ultimate span分类
交通工程引用本文复制引用
赵会东..大跨度双线铁路混凝土桥极限跨径的研究[J].铁道标准设计,2018,62(4):92-96,5.基金项目
中国铁路总公司科技研究计划开发项目(2016G002-I) （2016G002-I）
