Study on vehicle bridge coupled vibration and support reaction force of curved steel-concrete composite box girder bridge
Many steel-concrete composite curved box girder bridges have been built recently,while in these bridge designs,the understanding of vehicle-bridge coupled vibration was limited.Due to the effect of bending-torsion coupled under vertical loading,the change of the reaction force of the relevant support bearing has not been well solved.In this paper,based on the ABAQUS general finite element software,the horizontal curved motion of the vehicle was simulated by the method of Fourier series,which made the numerical analysis of vehicle bridge coupled vibration be possible.The numerical analysis results had verified for its accuracy with the existing experimental and theoretical ones.Taking a steel-concrete composite box girder bridge with four spans as an example,further analysis were carried out considering the influence of the support bearing force of bridge under the case of vehicle on the inside and outside lanes and superelevation.The results indicate that the outer support bearing of the other side of the box girder will appear falling,when the vehicle is driving along the inside or outside lanes of the curved girder bridge.The vehicle speed has little influence on the peak support bearing force,while the bearing separation can be alleviated by the lower vehicle speed.The superelevation has little effect on the support bearing reaction force.When the vehicle is driving along the inside lane,it will be easy to alleviate the falling of some support bearings of the outside box girder.When it is driving along the outside lane,it will aggravate the bearing separation of the inside box girder.
万方数据
维普
