| The bridge of single pillar pier is widely used because of the advantages of small footprint,good visual field and beautiful shape,but many overturning accidents occurred in the actual operation of the bridge in recent years,resulting in significant economic losses and adverse social impacts.Based on the inverse reliability theory,this paper studies the anti-overturning performance of a single pillar pier bridge,so as to provide guidance for the design of single pillar pier bridges.The main research contents are as follows:1.Through inductive analysis,the inverse reliability problem is transformed into function optimization problem,and the inverse reliability problem solving method based on simulated annealing particle swarm algorithm is proposed,and the correctness and accuracy of the proposed method are verified by several numerical examples.2.Aiming at the shortcomings of the inverse reliability analysis method in solving the inverse reliability problem of implicit functional function,the paper proposes a method based on support vector machine function fitting technique,and verifies the correctness and accuracy of the proposed method by numerical examples.3.Based on the inverse reliability theory,the anti-overturning stability coefficient is used as an unknown parameter to construct the performance function of the anti-overturning stability analysis of the bridge with single pillar pier,and the value basis of the target reliable index in inverse reliability analysis is established,which lays the foundation for the application and analysis of real bridge.4.Taking a single pillar pier as the research object,calculating the anti-overturning stability coefficient under different target reliability indices,and analyzing the influence of parameter uncertainty on the overturning stability coefficient,and studying the influence of the distance between the end bearing and the radius of bending moment on the anti-overturning performance of the single pier bridge. |
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