Abstract
Improving the efficiency of deformation monitoring systems for engineering structures is an important scientific and technical problem. The objective of the experimental studies presented in this paper is to establish the possibility of using the acoustic emission (AE) method to record inelastic deformation in elements of a large-scale model reinforced concrete structure. The paper presents the results of an experiment in which elastic and inelastic deformation of a large-scale model reinforced concrete structure was performed as a result of local force loading. The experiment was carried out on a special experimental stand that allows studying deformation processes in building and engineering structures with typical linear dimensions of about 10 m. The loading was cyclical - "load - full unloading" with an increase in load at each stage by no more than 10 kN. Registration of AE signals generated in the vicinity of the load application point was carried out by a system of acoustic sensors located at different distances from the AE source. It is shown that the amplitude-frequency composition of the signals changes with increasing distance from the AE source. The high-frequency component of the signal at a distance of more than 2 m from the source practically disappears and only the low-frequency component remains. There is a significant dispersion of the acoustic signal with increasing distance from the source. The possibility of recording and analyzing AE signals at a distance of up to 4 m from the source is shown. The obtained results can be used in the development and creation of automated systems for monitoring deformation processes in large-sized concrete structures using the AE method.
Published Version
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