Acoustic Emission Testing of Beams to Simulate SHM of Vintage Reinforced Concrete Deck Girder Highway Bridges

Abstract

The practical application of Acoustic emission (AE) testing in the Structural Health Monitoring (SHM) of vintage steel reinforced concrete highway bridges has been recently investigated by the Oregon Department of Transportation (ODOT) and Oregon State University (OSU). A large number of full scale laboratory test beams designed to simulate a particular class of highway bridge structure and a particular type of structural damage were tested with AE. The results of the AE test data analyzed using the Felicity and Calm ratios are presented and related to physically observed structural damage. New thresholds on the Felicity and Calm ratios specific to this class of structure and loading are suggested (based on the test results) to be used in both the damage assessment diagrams developed in the Japanese Non-destructive Inspection Standard NDIS-2421 and implementation into a SHM program currently under development at ODOT.

Keywords

SHM diagonal tension cracking RCDG AE shear cracking load rating

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References

Kuennen, T. (2006). Taming Oregon's Cracked Bridges, Better Roads Magazine, pp. 54-63, April 2006.

Strategic Planning and Research Report (2005). Assessment methods for diagonally cracked reinforced concrete deck girders, SPR-350, Oregon Department of Transportation .

Strategic Planning and Research Report (2005). Remaining service life of reinforced concrete beams with diagonal tension cracks, SPR-341, Oregon Department of Transportation.

Strategic Planning and Research report (2007). Acoustic emissions testing of concrete bridges, SPR-633, Oregon Department of Transportation (due for publication).

Lovejoy, S.C. (2006). Development of acoustic emissions testing procedures applicable to conventionally reinforced concrete deck girder bridges subjected to diagonal tension cracking, PhD Dissertation, Oregon State University.

Ohstu, M. , Uchida, M. , Okamoto, T. and Yuyama, S. (2002). Damage assessment of reinforced concrete beams qualified by acoustic emission. ACI Structural Journal, 99(4), 411-417.

Fowler, T.J. , Blessing, J.A. and Conlisk, P.J. (1989). New directions in testing. In: Proc. 3rd International Symposium on Acoustic Emission from Composite Materials, Paris, France.

Golaski, L. , Gebski, P. and Ono, K. (2002). Diagnostics of reinforced concrete bridges by acoustic emission. Journal of Acoustic Emission, 20, 83-98.

Kurz, J.H. , Finck, F. , Grosse, C.U. and Reinhardt, H.-W. (2006). Stress drop and stress redistribution in concrete quantified over time by the b-value analysis. SAGE Publications, 5(1), 69-81.

10.

Shumacher, T. (2006). Acoustic emission monitoring of flexural tension reinforcement anchorage zones in full scale bridge bent caps, Master of Science Project Report, Oregon State University, Corvallis, Oregon.