Analysis Of The Effect Of A Reinforced Framed Arch Bridge On Vehicle-bridge Coupling Vibration

Based on the multi-girder model of a framed arch bridge before and after sections increasing reinforcement, this paper is to present the results of an investigation of the dynamic by using self-edit programme, with vehicle velocity and road surface roughness caused by single vehicle moving across it. The detail research contents of paper are as follows:Firstly, the research features and the problems unsolved at present of vehicle-bridge interaction are reviewed, and reinforecement about it are summarized to set the study orientation.Secondly, programming operator interface, simulation of surface roughness and related idea of multi-girder longitudinal beams of bridge dynamic analysis system(BDANS) is presented in details. Then a framed arch reinforced by using section increment as an example, initial finite element models considering structure properties is developed, and dynamic characteristics of the bridge before and after reinforcement is analyzed on its natural vibration characteristics.Thirdly, analysis of dynamic response and impact coefficient of the framed arch bridge middle main span before and after reinforcement on single vehicle is calculated, which considered the velocity of vehicles and surface roughness. Moreover, In order to provide a contrast between the bridge before and after reinforcement on vibration response and spectrum characteristics of vertical acceleration of vehicle-bridge system, the vertical acceleration of middle span and centriod of vehicle were mainly studied by using the software MATLAB.