Calculation And Study For The Rail Way Simply Supported Composite Steel-Concrete Box Gireder

The composite steel-concrete girder has big stiffness, small noise, small building height, light self-respect, short construction period, etc features. It is often used for crossing over railroad, highway etc. work site that requested to meet the control high beam, reduce weight, fast construction requirements. Our country starts using to combine beam in 50's in last century. Because the strengths and weaknesses of the early composite girder in our country are obvious, composite steel-concrete girder in our country used a lot but again after the brilliancy in initial stage few.For nearly decade, along with passenger dedicated railway line, high-speed railway in the large-scale construction,the application of the composite steel-concrete girder bridge is given high attention in China and makes a systematic experimental studies. Many composite girder bridge have been completed, designing and building. Therefore, it is very necessary and have worthy practical engineering to study the composite girder bridge.At first, this thesis introduces the definition of the composite girder and the status of domestic and foreign research and simply introduces beam calculation problems and computing emphasis. Then combinating with the engineering practice, using the finite element analysis software ANSYS to analyze the 32m and 40m beam. It is adopting 8-node solid element with space Solid45 to simulate the concrete bridge deck, using plate elements SHELL181 to simulate the steel beam plates. Through the freedom degree coupling, steel girders and concrete bridge panel press completely consolidation processing.It has calculated for the construction stage, operation stage of static analysis and calculation of dynamic characteristics. The result enunciation that all of the various index signs meet the standard requirements.Through the results of this thesis research, it obtaines some valuable rules, putting forward some beneficial suggestions and providing certain reference value for future similar structures, design, construction and bridge monitoring.