Experimental study on fracture process of concrete by acoustic emission technology

• Autorzy: Yang Y. , Zhang L. , Lv J. , Wang C.

Warianty tytułu

PL

Eksperymentalna analiza procesu pękania betonu z wykorzystaniem sygnału emisji akustycznej

• Języki publikacji: EN

Abstrakty

EN

Acoustic emission is a method widely used for real time monitoring of the structural condition of materials. In this paper, the uniaxial compression tests will be carried out to acquire the correlation between the characteristics of acoustic emission signals and that of the concrete strength parameter. In the fracture process of concrete, acoustic emission, which is detected by the sensors, is generated when part of the strain energy stored in the samples is rapidly released. In order to analyze the results of experiments better, the acoustic emission event rate and the strain curve are applied. The results show that the concrete strength has an important impact on acoustic emission signals: for low-strength concrete, the acoustic emission event rate columns of fracture process are divided into six stages, and display a clear "bimodal" distribution, but such phenomenon does not appear in high-strength concrete.

PL

W artykule zaprezentowano testy określające korelację między sygnałem emisji akustycznej a parametrami betonu. Badano sygnał emisji akustycznej towarzyszący pękaniu betonu.

Słowa kluczowe

EN

acoustic emission (AE); concrete; uniaxial compression

PL

metoda emisji akustycznej; beton; pękanie betonu

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2012
• Tom: R. 88, nr 9b
• Strony: 55--58
• Opis fizyczny: Bibliogr. 7 poz., rys., tab.

Twórcy

autor

Yang Y.

• China University of Geosciences (Beijing)

autor

Zhang L.

• China University of Geosciences (Beijing)

autor

Lv J.

• China University of Geosciences (Beijing)

autor

Wang C.

• China University of Geosciences (Beijing)

Bibliografia

• [1] Kaiser J., An investigation into the occurrence of noises in tensile tests or a study of acoustic phenomena in tensile tests, PhD thesis, Technische Hochschule – Munchen, Munich, Germany, 1950.
• [2] W. M. McCabe, R. M. Koerner and A. E. Lord, Acoustic emission behavior of concrete laboratory specimens, J. Am. Concr. Inst., 73(1976), No. 7, 367-371
• [3] H. G. Ji, Research and application of acoustic emission properties of concrete material, China Coal Industry Publishing House, Beijing (2004)
• [4] J. W. Zhou, W. Y. Xu and X. G. Yang, A microcrack damage model for brittle rocks under uniaxial compression, Mech. Res. Commun., 37(2010), No. 4, 399-405
• [5] D. G. Aggelis, T. Shiotani, S. Momoki and A. Hirama, Acoustic emission and ultrasound for damage characterization of concrete elements, ACI Materials Journal, 106(2009), No. 6, 509-514
• [6] N. N. Kencanawati and M. Shigeishi, Acoustic emission sources of breakdown failure due to pulsed-electric discharge in concrete, Construction and Building Materials, 25(2011), No. 4, 1691-1698
• [7] Z. Z. Zhang, F. Gao and X. L. Xu, Acoustic emission characteristics and thermodynamic coupling model of granite under uniaxial compression, Chinese Journal of Underground Space and Engineering, 6(2010), No. 1, 70-74