Development of a methodology for monitoring the technical state of bridge structures and establishment of safe operation period

Keywords

reinforced concrete beam, specific compressive and tensile fracture energy of concrete, optical-digital correlation of speckle images.

Cite as

Ivanytskyi Ya. L., Blikharskyi Z. Ya., Maksymenko O. Р., Panchenko O. V., and Blikharskyi Ya. Z. Development of a methodology for monitoring the technical state of bridge structures and establishment of safe operation period. Physico­chemical Mechanics of Materials. 2023. 59(6), 064-071.

https://doi.org/10.15407/pcmm2023.06.064

 

Abstract

A methodology for determining the technical state of reinforced concrete bridge structures has been developed. It is based on establishing the depth and location of the largest deflec­tion using a laser projection system, as well as an approach to finding the stress-strain state along the height of the beam. For this, an energy approach is used, which involves the cal­culation of the energy of elastic-plastic deformation of concrete and reinforcement. The specific fracture energy as an invariant characteristic of concrete strength under tension, compression, and also tension of reinforcement have been established experimentally. A method of constructing true diagrams of deformation and fracture of concrete samples taken from the structure has been created. The results of experimental studies of the stress-strain state during bending of a reinforced concrete beam agree well with those calculated by the finite element method.

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