Research On Overturning Resistance And Reinforcement Method Of Single Column Pier Bridge

With the steady progress of my country’s high-quality development,urban construction has become a major issue.The problem of urban congestion is particularly serious,making it more difficult for citizens to travel.In order to alleviate urban road congestion and improve travel quality,single-post pier-girder bridges are favored because of their beautiful appearance and less space occupation under the bridge.Compared with other bridge types,the structure is simple and economical.However,in the bridge accidents that occurred in recent years,there are not a few single-pillar pier-girder bridges,which have also brought tremendous impact on the development of society.Under such a background,it is of great practical significance and engineering value to analyze and study the anti-overturning performance and reconstruction and reinforcement measures of the single-column pier and beam bridge.This article will be discussed from the following aspects:Analyzing the force characteristics and main influencing factors of curved beam bridges with single-column pier:(1)Analyze and discuss the stress characteristics and main influencing factors of the curved beam bridge with single column pier.(2)Introduce the anti-overturning stability coefficient and calculation method of single column pier beam bridge,determine the most unfavorable overturning axis of single column pier beam bridge.(3)Using midas civil to change the radius of curvature of the flat curve of the single-pillar beam bridge,the distance between the double supports at the beam end and the pre-eccentricity of the mid-pier support,etc.,to study the influence on the reaction force of the inner and outer supports of the beam end and the anti-overturning performance of the beam bridge.Through analysis,it is found that for beam bridges with large radius of c urvature,double bearing spacing and single pre-eccentricity of the mid-pier single bearing,the difference in reaction force between the inner and outer bearing of the beam end is small.The reasonable pre-eccentricity of single bearing and the distance b etween double bearings can improve the anti-overturning performance of the beam bridge.(4)When calculating the anti-overturning stability coefficient,select the overturning axis method and determine the failure bearing method in combination with midas cdn software to analyze the advantages and disadvantages of the two methods.The coefficient obtained by the overturning axis method is too large,while the coefficient of determining the failure bearing method is too large Conservative.(5)Select the vehicle model with frequent accidents,do the most unfavorable load distribution,and study the maximum load value of the bicycle crossing the bridge under the normal use limit state and the load capacity limit state under different load condi tions.(6)Aiming at the disadvantages of the single column pier and beam bridge itself,a variety of reinforcement schemes are proposed,and two common methods are selected for reinforcement analysis and research.