Application of acoustic emission criteria for the study of deformation processes and destruction of reinforced concrete structures
https://doi.org/10.37538/0005-9889-2023-3(617)-38-44
Abstract
Introduction. The main results of the application of the method of acoustic emission criteria for the diagnosis of the pre-destructive state of reinforced concrete structures are presented. The paper considers the relationship between the origin and growth of microcracks in reinforced concrete beams with deviations of invariant ratios from stable values of acoustic emission parameters.
The aim of the research is evaluate the possibility of using the invariant method for the diagnosis of reinforced concrete structures. Refinement of numerical values of time and amplitude invariants, time and amplitude information parameters for reinforced concrete beams. Determination of the relationship of invariants with the scale of destruction in reinforced concrete structures.
Materials and methods. Experimental studies were carried out on reinforced concrete beams made of heavy concrete (compressive strength class B60, B90) and fiber concrete (compressive strength class B30, B60). In the process of testing the beams, acoustic emission measurements were carried out, the crack sizes were fixed.
Results. The test results allowed us to establish numerical values of time and amplitude invariant criteria, time and amplitude information parameters for reinforced concrete beams. The numerical values of the time invariant have values close to 1, the amplitude invariant has a value of 0,1, and the information parameter of the time intervals and the amplitude information parameter are equal to 0 at the initial stage of loading the samples.
Conclusions. Studies have shown the possibility of quantifying the size of cracks (the total length in the control zone) of the structure using the invariant method. The most informative are the time and amplitude invariant criteria.
Keywords
acoustic emission,
Poisson distribution,
time invariant,
amplitude invariant,
information parameter,
reinforced concrete
Supporting agencies: The work was carried out at the expense of the state budget.
About the Authors
A. I. Sagaidak
Research institute of concrete and reinforced concrete (NIIZHB) named after A.A. Gvozdev, JSC Research Center of Construction
Russian Federation
Russian Federation
Alexandr I. Sagaidak, Cand. Sci. (Engineering), Leading Researcher of the Center No. 20, NIIZHB named after A.A. Gvozdev, JSC Research Center of Construction, Moscow
e-mail: sagaidak-niizhb@mail.ru
E. S. Borovkova
Euphrosyne Polotskaya state university of Polotsk
Belarus
Belarus
Evgeniya S. Borovkova, Physicist, Senior Lecturer at the Euphrosyne Polotsk State University, Novopolotsk
e-mail: e.borovkova@psu.by
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Review
For citations:
Sagaidak A.I., Borovkova E.S. Application of acoustic emission criteria for the study of deformation processes and destruction of reinforced concrete structures. Concrete and Reinforced Concrete. 2023;617(3):38-44. (In Russ.) https://doi.org/10.37538/0005-9889-2023-3(617)-38-44
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