Anti-overturning Nonlinear Analysis Of Continuous Girder Bridge With Single Column Pier

Due to the large space under the bridge and the convenient construction of foundations and bridge piers,the single-pillared bridges are also beautiful in appearance.Based on these advantages,they have been built in large numbers and more are being built in urban bridges.However,in recent years,there have been several accidents involving the overturning of a single-pillared pier in China,resulting in great loss of personnel and property.In this paper,the single-pillar pier continuous beam is taken as the research object,and the anti-overturning capacity parameter analysis,the detailed analysis of the overturning process,the analysis of the reliability of the single-column pier bridge and the analysis of the single-pillar pier bridge load test are carried out in order to deepen the bridge to the single pier.The understanding will make a useful contribution to the design and verification of the single pier bridge.The specific work is as follows:(1)Analyze the anti-overturning performance of single-column continuous girder bridge under different parameters,focusing on the influence of radius of curvature,eccentricity and the distance between connecting piers.(2)Taking a 6-span continuous beam overturning accident in China as an example,the finite element software ANSYS was used to establish the model.Through the nonlinear theoretical calculation and finite element simulation of the single pier bridge in the overturning process,the single pier bridge was inferred and verified.Possible causes and mechanisms of overturning.(3)Based on the measured random flow data,reconstruct the random vehicle flow function,calculate the variation coefficient of the vehicle load,and finally use the inverse reliability theory to calculate the anti-overturning coefficient of the single pier bridge under the determined target reliability index,and explore the two The relationship provides guidance for the design calculation of a single pier girder bridge.(4)The study on the partial offset and overturning test of the single pillar pier car,analyzes the deflection and stress variation of the main beam when the single pillar pier car is under partial load.