Research on Comprehensive Assessment Algorithm of Bridge Structural Performance Based on K-means+Davies-Bouldin Index+PCA Method
This paper aims to propose a model that enables the determination of a multi-parameter integrated assessment algorithm for evaluating the performance of bridge structural members,with the intention to guide maintenance decisions related to the bridge structural system,ensuring its safe operation.Initially,a structural nonlinear analysis method is employed to determine the theoretical load carrying capacity thresholds for each member of a double-deck truss tie arch bridge structure in the limit state.Subsequently,the bridge performance is evaluated using the improved K-means method and Davies-Bouldin index method,based on the cluster analysis method.Principal component analysis is then applied to comprehensively assess the key factors associated with multiple parameters.Through a case study of a double-deck truss tie arch bridge,the effectiveness and validity of the assessment methods proposed in this paper for evaluating the performance of suspenders during the operation stage are verified.The results indicate that the optimized assessment method proposed in this paper accurately captures the performance changes of the tension cable structure and offers valuable insights for bridge maintenance decision-making.
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