Controlled parameters of monitoring systems for railway bridge superstructures with trusses

Abstract

The bridge superstructures are crucial, expensive components of the transportation system, significantly influencing safety and operational continuity. Modern regulations mandate monitoring for large and exceptional bridges. Monitoring systems are just beginning to be actively implemented, and the existing method for evaluating technical condition based on monitoring results needs refinement. This article examines the monitored parameters of railway bridge superstructures with through trusses based on theoretical and experimental analysis of the stressed-deformed state of the bridge superstructure over the Ob River in Novosibirsk. The study aims to improve the method for evaluating the technical condition of lattice superstructures based on automated monitoring results. New monitored parameters were proposed to more accurately track the onset and development of damage in the superstructure. The analysis of data from strain sensors installed on the Komsomolsky Bridge over the Ob River in Novosibirsk demonstrated the advantages of using invariant parameters and stresses in elements under identical loads for assessing bridge conditions. The study confirms the possibility of using these parameters to enhance the accuracy of damage detection by the monitoring system, thereby increasing railway network safety. This work contributes to the development of methods for assessing the condition of railway superstructures based on monitoring results. The findings are supported by statistical data analysis and can serve as a basis for improving monitoring systems, enhancing their accuracy and reliability in predicting the technical condition of metal superstructures.