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Zastosowanie tensora momentu w procedurze SiGMA

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ŚWIT G., TEODORCZYK M.
Edukacja-Technika-Informatyka
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2013
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vol. 4
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issue 2
451-455
PL
Na Politechnice Świętokrzyskiej w Kielcach realizowany jest projekt badawczy dotyczący opracowania metody emisji akustycznej do oceny stanu technicznego konstrukcji żelbetowych. Jednocześnie prowadzone są badania nad analizą propagacji fali sprężystej w elementach żelbetowych. W pracy zaprezentowano teoretyczne podejście do procedury SiGMA i tensora momentu opisujące ruch fali emisji akustycznej powstały w wyniku pęknięcia betonu W praktyce planowane jest badanie propagacji fali sprężystej w elementach betonowych z wykorzystaniem aparatury pomiarowej wyposażonej w moduł SiGMA 3D. Moduł wykorzystuje procedurę SiGMA i tensor momentu, aby zlokalizować źródło sygnału emisji akustycznej i przedstawić graficznie propagację fali w ośrodku
EN
The research project is carried out at Kielce University of Technology for the development of an acoustic emission method for the evaluation of structural condition of reinforced concrete structures. At the same time, the analysis of an elastic wave propagation in reinforced concrete elements is carried out. This paper presents theoretical treatment of the acoustic emission wave due to cracking in concrete. It is represented by tensor moment and SiGMA procedure. Authors are going to do research on the acoustic emission wave propagation using a SiGMA 3D module in the reinforced concrete elements. It is possible by appropriate test equipment. The SiGMA 3D module can locate the source and provide the graphical wave propagation in the medium
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Application of the SiGMA analysis to the stress evaluation of the cracking structures

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ŚWIT G., TEODORCZYK M.
Edukacja-Technika-Informatyka
|
2014
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vol. 5
|
issue 1
676-681
EN
The paper presents the method for the elastic wave processing and propagation analysis applied to the reinforced concrete element under load. The quantitative method gives information about structural changes within the material and enables three-dimensional location of local damage. The Sigma analysis based on a waveform of longitudinal waves was chosen for the study. On this base the analysis can locate the place of the concrete deterioration and evaluate the stress which causing cracking. The acoustic emission test was conducted by the industrial apparatus and six piezoelectric sensors. The waveforms of acoustic emission signals were analysed using computer software. The experimental study confirmed the correctness of the analysis on the base of cracking appearing. The Sigma analysis identified tensile stress, shearing stress and both simultaneously. The method can be useful in the early detection of the micro-cracking of the reinforced concrete elements.
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