Deep valley long-span bridge substructure construction risk evaluation method and system combined with static and dynamic evaluation

Abstract

The invention relates to a deep-valley long-span bridge substructure construction risk evaluation method and system in combination with static and dynamic evaluation. The method comprises the following steps: S1, extracting a bridge accident occurrence reason in a case library to establish a deep-valley long-span bridge substructure construction risk evaluation index system; s2, performing static assessment process division on each risk source, dividing risk levels according to coupling results, and discriminating major risk sources; s3, constructing a Bayesian network structure; s4, verifying and optimizing the structure of the Bayesian network; s5, determining a dynamic evaluation result; according to the method, the comprehensiveness and accuracy of risk identification are effectively improved, the influence of the quantity difference of different dangerous elements in different index systems on the evaluation result in a single evaluation method is reduced, and the influence of subjective judgment of experts on the result can be reduced by combining qualitative and quantitative judgment; the accuracy of an evaluation result is prevented from being reduced by a single evaluation standard; the influence degree of a risk source on an accident result is accurately reflected, and risk management and control measures are provided for safety construction of the lower structure of the deep-valley long-span bridge.

Images