Research On Anti-overturning Stability Of Single-pillar Pier Continuous Curved Bridge

Single column pier continuous curved bridge,a bridge in the shape of the terrain to design,to meet the requirements of terrain and realized already beautiful and fluent traffic routes,and curved bridge with different line shape and external supporting conditions,and it has advantages of small space,has been widely applied in engineering practice,especially some span and width bigger of the two lines.But in recent years,many Bridges capsized major accident,both for the bridge under vehicle load the overall overturning,there is not enough to its related research,the study of its features is a single,especially in the gravity load,vehicle load and under the seismic action scenes,single column pier continuous curved bridge resistive overturning stability also exists some problems worthy to be discussed.Based on the anti-overturning theoretical calculation and analysis of the single-pillar pier continuous curved bridge,this paper establishes a refined finite element analysis model of the curved bridge,analyzes the factors affecting the anti-overturning stability,and considers the influences of different scenes on the anti-overturning performance of the curved bridge.The specific research contents are as follows:1.Anti-overturning stability theory and calculation method of single-pillar pier continuous curved bridgeThis paper analyzes the static characteristics and calculation theory of continuous curved bridge,and expounds the calculation method of anti-overturning stability index and stability coefficient in combination with the domestic and foreign norms.2.Analysis of influencing factors of anti-overturning stability of single-pillar pier continuous curved bridgeBased on the highway load characteristics,with the help of the finite element software ABAQUS,the finite element modeling of the highway single-pillar pier continuous curved bridge is carried out to study the influence of different vehicle loads,curvature radius,span,number of spans and number of supports on the anti-overturning performance of the bridge.Calculation and comparison analysis of anti-overturning stability.3.Anti-overturning stability analysis of single-pillar pier continuous bent bridge under dead weight,constant load and vehicle loadCombined with engineering examples,this paper analyzes the displacement and stress characteristics of bridge deck and pier under the influence of dead weight and constant load and vehicle load,and calculates the anti-overturning stability coefficient of bridge superstructure under different vehicle load conditions.4.Anti-overturning stability analysis of single-pillar pier continuous curved bridge under the action of earthquakeCombined with the calculation theory of nonlinear time-history analysis method,seismic waves are selected and input,and the time-history response of curved bridges under seismic wave excitation is used to analyze the mechanical performance and stability of continuous curved bridges under seismic action.