Stabily Analysis Of Single Column Curved Girder Bridges

The continuous curved single pedestal pier bridges with its unique advantages has been widely applied on highway and urban interchange ramp bridge. Because of the curvature of the curved bridge allows bending and torsion coupling occurs, under the action of constant load and live load the structure’s stress state is more complex, thus brings more difficulties to design and construction. Bridge overturning accidents have occurred frequently in recent years, causing serious economic losses and social impacts.So,the research in the stability of the curve bridge is very meaningful for its further development.This paper studies the mechanics property and stability of the curved single pedestal pier bridges and its calculation method and influence factors. Analyzes the causes of common diseases, theoretical and computational methods to calculate the curved girder bridge.Based on a certain engineering, using the large-scale finite element software ANSYS establish solid element model to analyze the radius of curvature,the pre-offset of bridge bearing and the spacing of torsional support’s impact on curve bridge support reactions and internal forces.Then compare and analysis the different of the regulations on bridge stability between highway code and railway code. Assign the different loading modes and the most disadvantageous load case to calculate the transverse overturning stability of curved single pedestal pier bridges. And analyses the influence of curvature radius and bearing pre-offset on the transverse overturning stability.By using the method of increasing solid pier column to reinforce the practical engineering bridge,and comparative analysis of the support reactions and stability before reinforcement and after reinforcement. Through the research of the influence of new bearing spacing on curved bridge force, provided some reference for future bridge reinforcement.