Abstract

In view of operation characteristics of concrete dams in cold regions, comprehensively considering the impact of overwintering layer, cold wave and freeze-thaw and the representativeness of various evaluation indexes with in-situ monitoring data, an evaluation index system affecting the structural behavior of concrete dams in cold regions is constructed. Based on typical small probability method and analytic hierarchy process, the unequal interval division method of evaluation index grade is proposed. Based on game theory, a combined subjective and objective weighting method of evaluation indexes is established. In order to solve the problem of fuzziness and randomness of evaluation indexes, an improved interval intuitionistic fuzzy set method is adopted for a comprehensive evaluation method for structural behavior of concrete dams in cold regions. The effectiveness of the proposed method is verified by practical engineering application.

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