Engineering and technical provision of corrosion diagnostics during the reconstruction of bridge structures

Abstract

Diagnostics of the technical state of metal structures of bridge structures, the operation of which takes place in corrosive and aggressive environments of industrial enterprises, necessitates the development of a methodical approach that provides a comprehensive account of the parameters of the actual state of the structures and factors of the operating mode. The structural description of the process of diagnosing the condition of buildings based on the criterion of providing measures of primary and secondary protection against corrosion allows the implementation of the reconstruction program based on technical monitoring. Diagnosing the technical condition of metal structures requires taking into account the influence of various operational and production factors to determine the actual condition and predict the service life. The specifics of the implementation of the program of technical diagnostics of the corrosion state is that bridge structures in general and their separate parts are considered in a state of dynamic equilibrium, and the main signs of the danger of an emergency are the appearance of deformation of the structure or its structures. At the same time, the object can be characterized by many states that require a detailed description and account of their interaction. The main task of the research is the description of the inspection procedure and then determine the current state of the bridge structure.

The developed approach determines the sequence of measures to extend the residual resource using the probabilistic-physical method of reliability analysis, which includes the quantitative assessment of reliability indicators based on the results of expert diagnostics and the results of physicochemical and mathematical modeling of corrosion destruction during accelerated and bench tests. Determining the remaining resource and making a decision on the further operation of the object is carried out by the established patterns of changes in parameters obtained during the analysis of the mechanisms of damage development and based on the results of the determination of functional indicators.