The Alternative Project Of Long Span Railway Concrete Beam Bridges

Along with the development of the nation economy, the long span bridge has got very rapid development in our country. Among them, the big span concrete continuous rigid frame bridge is one of the style that is applied most extensively. Continuous beam with the advantages of small deformation,high structural rigidity,smooth running,fewer expansion and contraction joints,simple maintenance,strong strength of earthquake resisting, has long span rang of covering. The Wu Longjiang bridge is designed for Fu-Xia railway to cross the Wu Longjiang river. Three of the preliminary designs are continuous beam bridge,continuous rigid-frame bridge and combined system bridge. With the theory of finite element method, use matrix displacement method of structure of linear element in continuous media, and analyse the discrete combination elements of the continuous media. In this thesis, the main purpose of the study is:1. establish the three structural models. use Midas to get the displacements and force(or press) of nodes under the action of variety combined load.2. analyse the structures in the same styles and different combinations to make sure the more reasonable project.3.analyse the points of structures in the same styles and different combinations.By all the analysis, it may provide reference data to construction.