更大轴重重载铁路预应力混凝土简支梁设计研究

发布时间：2018-03-01 12:36

本文关键词： 重载铁路更大轴重对比分析简支箱梁荷载标准设计参数　出处：《中国铁道科学研究院》2017年硕士论文　论文类型：学位论文

【摘要】：铁路作为国家经济的重要基础设施、国民经济的大动脉,以其运力大、低成本、有利环保等特点在我国交通运输体系中的地位日趋重要,铁路运输的重载化已成为世界铁路主要发展方向之一。本文主要通过对比分析国内外重载铁路桥梁的设计活载标准、关键设计参数、铁路常用跨度桥梁的合理结构型式等方面的内容,推荐我国新建更大轴重重载铁路采用的活载图示,提出与我国更大轴重列车活载图式相对应的动力系数、离心力系数、牵引力和制动力系数等计算参数的取值。结合重载东郊环形试验线,完成了重载简支梁经济跨度及合理梁型的经济技术比选,确定32m简支箱梁为新建重载铁路合理梁型。采用提出的活载图示及参数,对更大轴重重载铁路32m简支箱梁进行结构计算和建模分析,绘制出梁部结构图、预应力布置图、桥面布置图等图纸,形成了梁部试设计成果。
[Abstract]:As an important infrastructure of national economy, railway plays an increasingly important role in China's transportation system because of its large capacity, low cost and favorable environmental protection. The heavy load of railway transportation has become one of the main development directions of railway in the world. This paper mainly analyzes the design live load standards and key design parameters of heavy haul railway bridges at home and abroad. In this paper, the reasonable structure type of the commonly used span bridges is discussed, and the drawing of live load is recommended for the construction of larger axle load and heavy haul railway in our country, and the dynamic coefficient and centrifugal force coefficient corresponding to the live load pattern of the larger axle load train in China are put forward. The calculation parameters such as traction force and braking force coefficient are selected. Combined with the ring test line of the eastern suburb of heavy load, the economical span and reasonable beam type of the heavy-load simply supported beam are compared and selected. The 32 m simply supported box girder is determined to be the reasonable beam type of the new heavy haul railway. The structure calculation and modeling analysis of the 32 m simple supported box girder of the railway with larger axle load and heavy load are carried out by using the living load diagram and parameters proposed, and the structure diagram of the beam and the layout of the prestress are drawn. Bridge floor layout and other drawings, forming a beam test design results.
【学位授予单位】：中国铁道科学研究院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.5

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