Dynamic Character And Coupling Vibration Of Vehicle/Bridge Analysis Of Concrete-Filled Stell Tubular Arch Bridge

In recent years , as a new-type bridge, concrete-filled steel tubular(CFST) arch bridge has been deeply developed in our country's construction, for its own merits and can luckily make agreement with the factual situation of bridge engineering.However, the study on design theories of CFST arch bridge gets relatively behind the engineering practice, and the search on dynamic performance of this structure get relatively behind the production on static feature of this structure. Presently, CFST arch bridges develop in the direction of large-span and lightweight style, accordingly, investigators and devisers should increasingly attach more importance to their dynamic behaviour, and some typical dynamic matter of bridges, such as seismic response, wind induced vibration, coupled dynamic vibration between bridge and vehicle should not be ignored.In this thesis, taking the example of some railroad CFST arch bridge (Yesanhe bridge), with the help of ANSYS, one universal FEM software, author analyze its dynamic behaviors and abstract it as follows:1. Establish 3-D finite element model of this whole bridge, calculate its dynamic characteristics, besides ,compare and study ways of establishing FE model; on the basis of this result, comparing the theorial and practical results of other bridges of such type, summarize dynamic characteristic of these bridges .2. Modify above model along with altering structural form or the constitution of the bridge, calculate the variety of dynamic character, analyze this factors which will affect, discuss appropriate ways to optimize the dynamic character, wishing provide certain use of reference to design.3. As to vehicle-bridge system coupling vibration, this difficulty in engineering industry, it was abstractly summarized in this thesis, and introduce a method to establish and resolve equations about such coupling vibration, bring forward a flow chart to write correlative software; with the help of ANSYS , make out some work about preparatory simulation, so as to research basic point of chicle-bridge system coupling vibration .