Sage Journals: Discover world-class research

Abstract

Stress redistribution and stress drop often coincide with fracture processes. The two experiments that were chosen for our b-value analysis generate failure processes with the corresponding stress drops and stress redistributions. Using acoustic emission analysis, the acoustic waves emitted from the different fracture areas are recorded. The cumulative frequency-magnitude distribution, which leads to the b-value, was originally used in seismology to characterize earthquake populations. Concerning acoustic emissions, the b-value decreases with increasing stress levels. Therefore, it was possible to determine the start of the arise of macro-cracks over time using the b-value analysis. Furthermore, a possible application in a monitoring procedure is suggested.

Keywords

b-value analysis improved b-value analysis acoustic emission stress distribution

Get full access to this article

View all access options for this article.

References

Hainzl, S. and Fischer, T. (2002). Indications for a successively triggered rupture growth underlying the 2000 earthquake swarm in Vogtland/NW Bohemia . Journal of Geophysical Research, 107(B12), 2338 , DOI:10.1029/2002JB001865.

Gutenberg, B. and Richter, C. (1954). Seismicity of the Earth and Associated Phenomena. Princeton, NJ, USA: Princeton University Press .

Shearer, P. (1999). Introduction to Seismology, Cambridge, UK: Cambridge University Press .

Neunhofer, H. and Guth, D. (1988). Mikrobeben seit 1962 im Vogtland . Zeitschrift für geologische Wissenschaften, 16(2), 135-146 .

Frohlich, C. and Davis, S.D. (1993). Teleseismic b Values; or, Much Ado About 1.0 . Journal of Geophysical Research, 98(B1), 631-644 .

Turcotte, D. (1997). Fractals and Chaos in Geology and Geophysics, 2nd edn, New York, USA: Cambridge University Press .

Colombo, S. , Main, I. and Forde, M. (2003). Assessing damage of reinforced concrete beam using “b-value” Analysis of acoustic emission signals . Journal of Materials in Civil Engineering, 15(3), 280-286 .

Scholz, C. (2002). The Mechanics of Earthquakes and Faulting, 2nd edn, New York, USA: Cambridge University Press .

Shiotani, T. , Yuyuma, S. , Li, Z. and Ohtsu, M. (2001). Application of AE improved b-value to quantitative evaluation of fracture process in concrete materials . Journal of Acoustic Emission, 18, 118-133 .

10.

Finck, F. , Yamanouchi, M. , Reinhardt, H.-W. and Grosse, C. (2003). Evaluation of mode-I failure of concrete in a splitting test using acoustic emission technique . International Journal of Fracture, 124, 139-152 .

11.

Scargle, J.D. , Steiman-Cameron, T.Y. , Young, K. , Donoho, D.L. , Crutchfield, J.P. and Imamura, J. (1993). The quasi-periodic oscillations and very low frequency noise of scorpius X-1 as transient chaos: a dripping handrail? Astrophysical Journal, 411, L91-L94 .

12.

Kurz, J.H. , Ruck, H.-J. , Finck, F. , Grosse, C. and Reinhardt, H.-W. (2003). Wavelet algorithms for nondestructive testing . In: Proceedings International Symposium Non-Destructive in Civil Engineering, Berlin, Germany, September 16-19, 2003, BB 85-CD, DGZfP.

13.

Torrence, C. and Compo, G. (1998). A practical guide to wavelet analysis . Bulletin of the American Meteorological Society, 79(1), 61-78 .

14.

Aki, K. (1965). Maximum likelihood estimate of b in the formula log(N) 1/4 a bM and its confidence limits . Bulletin of the Earthquake Research Institute, 43, 237-239 .

15.

Finck, F. (2002). Acoustic emission analysis of SFRC beams under cyclic bending loads . Otto Graf Journal, 13, 83-92 .

16.

Reinhardt, H.-W. , Ozbolt, J. , Xu, S. and Dinku, A. (1997). Shear of structural concrete members and pure mode II testing . Advanced Cement Based Materials, 5, 75-85 .

17.

Reinhardt, H.-W. and Xu, S. (1998). Experimental determination of KIIc of normal strength concrete . Materials and Structures, 31, 296-302 .

Stress Drop and Stress Redistribution in Concrete Quantified Over Time by the b-value Analysis

Abstract

Keywords

Get full access to this article

References