Research On Anti-overturning Stability Of Curved Beam Bridge With Single Column Pier

This article takes the actual engineering project as the background.Base on the finite element software to establish the lattice model of the curved beam bridge under different radius of curvature,the bearing arrangement ther span arrangement and the parameter was analysisd,we can obtain the regular of influence under the different influencing factors on the overturning stability of the curved beam bridge.The following research work has been done on the anti-overturning stability of the curved beam bridge with single-column pier.(1)Established the balance equations,geometric equations and physical equations of the curved beam microsections by the theory of elastic mechanics and analyzed The stress-bending characteristics of the curved beam bridge to reveal its stability principle.(2)The conclusion is derived from the establishment of the finite element beam model of the real bridge through Midas Civil:The anti-overturning stability coefficient decreases first and then increases during the increase of the radius of curvature of curved bridges.The anti-overturning stability coefficient decreases In the process of increasing the span of the bridge.The anti-overturning stability coefficient decreases in the process of increasing the distance between the end of bridge.(3)The advancd derivation of the anti-overturning stability coefficient formula leads to a more intuitive formula base on the "Road Reinforced Concrete and Prestressed Concrete Bridge Culvert Design Code" for curve beam bridge given anti-overturning stability coefficient formula.(4)Studyed the allowable limit load value of vehicles crossing bridges under normal service limit state and load capacity limit state.Analyze the influence of the radius of curvature on the allowable limit load of the curved beam bridge vehicle crossing the bicycle under two different states.(5)Proposed a design method that adopts the concepts of "robustness" and "strengthening ductility" and Summarized the anti-overturning reinforcement measures of curved beam bridge.Proved the effectiveness of reinforcement measures By Comparison of anti-overturning stability of single-pillar curved beam bridge before and after reinforcement.