Reliability research based on the fuzzy random time-variant probabilistic model for flexure member of reinforced concrete bridge beam

摘要

Based on the fuzzy random time-variant probabilistic model, research on the assessment methods for the reliability of existing reinforced concrete bridge is performed. Considering the time-dependent feature of the structural resistance for existing reinforced concrete bridges, probability models for assessment of the present resistance and time-dependent resistance model is given. The resistance degradation probabilistic model under fuzziness and randomness for flexural member is established. The fuzzy random time-variant probabilistic model of flexure member is established for RC beam bridge, and the analytical method for the mean value and standard deviation of resistance under the fuzziness changing with time is presented.