TECHNICAL CONDITION ANALYSIS OF SAINT-PETERSBURG OPERATED REINFORCED CONCRETE BRIDGE CONSTRUCTIONS

Abstract

St. Petersburg possesses a large number of bridge constructions operated throughout a long time. Mainly these are objects made of reinforced concrete. Among bridges of the city there is a set of unique constructions. Specifics of bridges maintenance in megalopolis environment are characterized by difficult climatic and technogenic conditions. It causes emergence and development of numerous defects and damages in designs. For development of scientifically based techniques of assessment and forecasting of technical condition of the operated bridge constructions (in particular, reinforced concrete) the authentic and urgent analysis of this state is necessary. It is possible to execute it, having formulated the corresponding criteria and methods of assessment, and also having created a certain methodology of the analysis, as it is executed in the present article. Six evaluation criteria on which it is possible to carry out complex diagnostics of bridges of St. Petersburg are designated. Results of the analysis confirm need of special approaches to operation of megalopolises bridges park and also on a large number of constructions with extremely unsatisfactory technical condition.