Research On Calculation Theory And Verification Of Single Column Pier Curved Bridge With Mulit Elastic Supports

In recent years,overload caused the frequent bridge accidents.The systematic research on straight single-column bridge is mainly based on rigid rotation theory which was proved with large error.Regarding the Single column pier curved bridge,the anti-overturning calculation cannot be solved effectively because of various influence factors such as torsional coupling,the space force and rigid rotation.By studying the Single column pier curved bridge,this thesis focuses on three aspects as follows:(1)Through investigation and study of the two curved girder bridges with a single column pier collapsed wreckage site,proved Yuegan bridge overturned based on rigid rotation and Chunhui Bridge overturned based on torsional deformation and rigid rotation.(2)Based on torsional deformation and rigid rotation,by the energy method and variation principle,propose the methods of anti-overturning calculation which considers three dimensions included vertical flexure deformation,radial flexure deformation and torsional deformation.(3)In the example of Yuegan bridge and Chunhui Bridge,verified the theoretical calculation method and analyzed the influencing(1)Increase the linear gravity,the distance of end supports,bearing transverse size and the radius of curvature can significantly improve the anti-overturning capacity of single-column bridges.