摘要:近年来，随着我国铁路建设的日益发展，高速铁路成为未来铁路发展的必然趋势，无砟轨道由于良好的性能，被广泛的应用于高速铁路轨道中，高速铁路的发展史证明，其基础工程如果使用常规的轨道系统，会造成道砟粉化严重、线路文修频繁的后果，安全性、舒适性、经济性相对较差。但无砟轨道均克服了上述缺点，是高速铁路工程技术的发展方向。无砟轨道平顺性好，稳定性好，使用寿命长，耐久性好，文修工作少，避免了飞溅道砟。无砟轨道的枕木本身是混凝土浇灌而成，而路基也不用碎石，铁轨、轨枕直接铺在混凝土上。无砟轨道是当今世界先进的轨道技术，可以减少文护、降低粉尘、美化环境。5063
 本设计以高速铁路32m预应力混凝土组合简支梁为研究对象，通过有限元软件MIDAS建立实体单元，对箱梁纵向正应力、剪力滞及挠度几个典型力学特性进行了研究。利用MIDAS模拟实体箱梁的方法，得出箱梁相应的受力情况，为设计提供了计算说明。
  关键词：预应力混凝土箱梁；纵向正应力；剪力滞；挠度；高速铁路 毕业论文
Design of the Beijing-shanghai High speed of Railway Prestressed Concrete single cell box girder bridge and bridge resonance studies
    Abstract:In recent years,with the development of railway construction in our country,the high-speed railway has become the inevitable trend of future development of railway.Ballastless track due to good performance,has been widely applied in high-speed railway track,that the history of the development of high-speed railway,the basic engineering if using  conventional rail system,will cause a serious chalking,ballast line repair frequent consequences,safety,comfort,economy relatively poor .But the ballastless track is to overcome these shortcomings,is the development direction of engineering technology of high-speed railway.Ballastless track smoothness is good ,good stability,long service life,good durability, repair work less,avoid splash ballast.Ballastless track sleepers are concrete pouring,and the roadbed without gravel,rail,sleeper laid directly on the concrete.Ballastless track is one of the world`s advanced rail technology,can reduce the maintenance,reduce dust,beautify the environment.
The design of high-speed railway 32m prestressed concrete composite beam as the object of study,through the finite element software MIDAS to establish solid element,of the box girder longitudinal normal stress,shear lag and deflection of several typical properties are studied.Using MIDAS simulation entity box girder box girder method,drow corresponding stress state,as the design provides calculation.
   Keywords: prestressed concrete box girder; longitudinal normal stress shear lag; deflection;high-speed railway
 目录
1 绪论    1
1.1京沪高速铁路工程概况    1
1.1.1 工程总体概要    1
1.1.2工程主要特征    1
1.2京沪高速铁路的技术特点和技术挑战    3
1.2.1技术特点    3
1.2.2 技术挑战    4
1.3 设计内容    5

2 桥梁方案比选及尺寸拟定    6
2.1 拟定方案并进行比较    6
2.1.1构思宗旨    6
2.1.2 比选原则    6
2.1.3 拟定方案    7
2.1.4 方案比选及结果    8
3计算内容及方法    11
3.1 建立模型    11
3.1.1作用计算方法概述    11
  3.1.2模型的建立    11
  3.1.3箱梁横截面几何特性值    11
3.2施工方法    12
3.3内力计算    12 高速铁路简支箱梁桥设计和车桥共振研究+CAD图纸:http://www.751com.cn/gongcheng/lunwen_1945.html