毕设正-7×24m高速铁路预应力混凝土连续梁桥的设计..docVIP

中文摘要 本次毕业设计为（7×24mMIDAS CIVIL辅助计算。主梁的内力计算可分为设计内力计算和施工内力计算两部分。设计内力是强度验算及配筋设计的依据。施工内力主要供施工阶段验算用。 本桥选用先简支后连续法施工。先按照简支梁规模化施工，后用湿接缝把相邻块的梁块连接成连续梁，从而得到连续梁优越的使用效果。这种施工方法已经被广泛用于预应力混凝土连续梁的施工中，目前已形成较成熟的技术，施工质量易得到保证。 除此之外，在本次设计过程中还应用到了Auto CAD、EXCELAbstract This paper is mainly about a high-speed railway prestressed continuous bridge with three spans of (7×24) m. It is aimed at the design and calculation of the superstructure, and the emphasis is put on the structure form and size of main girder, establishment of FEM models, construction process, calculation of stress, strength and crack resistance of each construction process as well as the completed stage and the drawings. The structure form and size of the bridge is determined by scheme comparison, design principles and experience. The MIDAS CIVIL, a kind of software for bridge designing, is selected to help to calculate. The internal force calculation of the girder consists of two parts: the design internal force calculation and the construction internal force calculation. The design internal force calculation is the basis of strength checking and reinforcement design. The construction internal force is mainly used for strength checking during construction process. The bridge is made by the Simply Supported-Continuous construction method. This kind of construction method is adopted currently in constructions of the continuous bridge, which has already become more mature, and the quantity of construction can be more easily guaranteed. In addition, other kinds of software such as Auto CAD and EXCEL are also used to help the design，which make it more efficient and accurate to accomplish the graduation project. Key words： prestressed concrete continuous girder; structural design; Simply Supported-Continuous; FEM model 第1章：绪论 1.1高速铁路桥梁的发展现状 自有铁路以来，速度一直是人们追求的目标，一般认为时速低于200km/h的铁路，称为普通铁路或快速铁路，高于200km/h的称为高速铁路。 1964年世界第一条高速铁路——日本东海道新干线建成，行车速度达到210km/h，揭示了铁路这一运输工具同其它运输行业竞争的巨大潜力。高速铁路速度快，运输能力大，节省能源及土地，环境污染轻，是一种有发展前途的现代化交通工具。继东