【作者】 张晴伟；

【导师】 申爱国；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2010， 硕士

【摘要】 随着我国高速铁路的迅速发展,对高速铁路桥梁在刚度、整体抗震性能,动力性能等方面有更高的要求。正交异性整体钢桥面板与桁架组合体系桥梁具有刚度大、整体性好、动力性能好、噪声小等优点,是高速铁路大跨度钢桥较为合适的结构形式之一。但由于下弦杆、纵梁、横梁的上翼缘是钢桥面板的组成部分,体系受力复杂。使设计、分析计算难度更大。论文以在建的漯河到阜阳新建铁路赵寨颖河铁路双线板桁组合钢桁桥的设计工作为背景,从受力性能及构造细节两个方面进行较深入的探讨,其主要工作如下：(1)对钢桁梁桥的发展历史做了系统的回顾,概括了板桁组合体系的结构形式及力学特点,总结了计算方法的研究现状。(2)在充分研究赵寨颖河双线特大桥具体建桥条件的基础上,对包括下承式钢箱系杆拱桥、预应力混凝土连续梁、板桁组合钢桁梁在内的不同桥式方案从经济、施工、设计等多方面进行对比,最后确定了最优桥式方案。(3)研究板桁组合简支钢桁梁的构造尺寸和主桁杆件截面形状和尺寸的合理选择,采用空间板梁单元法、平面简化计算方法对其整体受力行为进行对比计算分析,并对不同方法的精度、适用范围及计算代价等进行了对比和评价。(4)分析了规范对强度、稳定和疲劳的计算原则和注意事项,编制铁路钢桥杆件检算程序CRBSS,对赵寨颖河特大桥主桁各杆件进行强度、稳定性、疲劳性能及连接的检算。(5)本文详细研究了板桁组合钢桁梁的关键细部结构,采用有限元程序ANSYS,对支座、顶梁局部,正交异性板桥面进行了详细的局部分析；结合分析结果,探讨了大跨度板桁组合体系钢桥面的合理布置形式及其适用范围。更多还原

【Abstract】 Along with our country high-speed railways rapid development, to the railroad bridge in the rigidity,the earthquake resistance performance, excellent dynamic behavior and so on has a higher request.Truss with orthotropic steel bridge deck is one of the relatively reasonable structural types in long-span bridges of high-speed railways,because of its great rigidty,good integrity, excellent dynamic behavior,making low noise etc.However,upper flanges of lower chords,longitudinal girders,transverse girders,transverse girders,as parts of the steel bridge deck,whose mechanical behavior are complex. Make design and analysis calculation rather difficult.In the dissertation, mechanical properties and Structure detail for railroad two-line Plate-truss composite steel truss bridge are studied deeply on the background of ZhaoZhai YingHe River bridge of the newly built railroad from Luohe to Fuyang.The main research works are as following:(1) The thesis reviewed the development of railroad steel truss bridge systematically and summarized the structural and the mechanical properties of plate-truss composite.Also the research status of calculation method was summarized.(2) On the basis of sufficient study on the constructive condition of the ZhaoZhai Yinghe River bridge,different types of bridges including bottom-road bridge steel box tie bar arched bridge,prestressed continuous concrete bridge and Plate-truss composite steel truss bridge were compared from economy, construction, design,etc. Plate-truss composite steel truss bridge was finally decided as the best optimized design scheme.(3) Research of structure size for Plate-truss composite steel truss bridge, the main truss shape and size reasonable choice, mechanical properties analysis of ZhaoZhai Yinghe River bridge has been made by using spatial panel-grider element and plane simplified calculation method.then,a sthdy and evaluation on different methods above in viem of calculation precision,computational cost and the applied range of analysis have been mead.(4) Calculation principle and matters needing attention for strength,stability, fatigue properties and connection are analyzed,also a bar member verification program has been compiled which was applied to check calculations the strength,stability, fatigue properties of the ZhaoZhai YingHe River bridge main truss.(5) Detail anaysis and research of Support,top-beam part,truss with orthotropic steel bridge deck for Plate-truss composite steel truss bridge.Combining with the analysis results,reasonale arrangement form and applicable range for long-span Plate-truss composite steel truss bridge with orthotropic steel bridge deck was discussed.更多还原