Dynamic Response of Continuous Girder Bridge Due to High-speed Trains
|School||Wuhan University of Technology|
|Course||Road and Railway Engineering|
|Keywords||High-speed rail Continuous beam bridge Dynamic Response Impact factor Time history analysis|
The high-speed rail is a professional wide range of advanced technology , systems engineering , along with the rapid development of China 's economy as well as the construction of energy-saving society the concept of the proposed high-speed railway construction in the ascendant . In the high - speed railway construction , bridges, and a large proportion . As the high - speed railway bridges are very strict requirements for bridge deformation , static design of the bridge structure design can not truly reflect the interaction of high - speed train and bridge power train impact factor can not ensure the design science , solely on the basis of the empirical formula , this problem will be more and more obvious with the constant speed of the train . In this paper, on the Wuhan-Guangzhou Passenger Line Luo water Bridge 48 80 48m continuous beam bridge engineering background , the high-speed train under the bridge dynamic response has been studied , the results with the specification in the empirical formula results obtained inadequate conclusions , considering the existing norms also provide reference for the high-speed rail can be used to guide the design of continuous beam bridge theoretical calculations of the impact coefficient . The research topics include : ( 1 ) application bridge structural dynamics, vehicle dynamics principle to establish a dynamic interaction analysis model of the train and bridge system . Elastic system dynamics and the total potential energy value principle and the formation of the matrix \( 2) Based on the above analysis model , detailed calculations the midspan section under different conditions edges , in cross -section , the fulcrum section three typical cross-section at the impact coefficient . ( 3 ) summary of the research paper and further research direction .