The Scour Resistance of Piers based on CM-AHP Model Evaluation Methodology

DOI: https://doi.org/10.62517/jcte.202506203

Author(s)

Zhao Yuxiao, Wang Shuikang, Qi Yunpeng

Affiliation(s)

Key Laboratory of Urban and Engineering Safety and Disaster Reduction, Ministry of Education, Beijing University of Technology, Beijing, China

Abstract

Foundation scouring is a significant form of bridge damage and has a high degree of suddenness and concealment. To propose an efficient and accurate method for evaluating the scour resistance capability of bridge pier foundations, ten primary influencing factors were selected based on the mechanism of scouring as evaluation indicators: water depth at flow, inflow velocity, river flow rate, riverbed gradient, median grain size in the riverbed, water obstruction ratio, foundation burial depth of the pier, equivalent width of the pier, scour protection measures, and scour pit depth. The CM (Cloud Model) improved the AHP (Analytic Hierarchy Process) evaluation matrix coding method to establish an evaluation method for the scour resistance capability of bridge pier foundations. The results show that the CM-AHP evaluation model can mitigate the excessive subjectivity in traditional AHP evaluation methods, ultimately reflecting the fuzziness and uncertainty of actual engineering conditions when resisting scour disasters. Finally, using a bridge project case study, this method was applied for evaluation, and the results were consistent with both the actual engineering report and the FAHP evaluation method.

Keywords

Pier Foundation; Scour Damage; CM-AHP Theory; Safety Evaluation

References

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