Tomographic reconstruction for concrete using attenuation of ultrasound

The development of attenuation tomography for concrete is discussed. Fundamental ultrasonic measurements of cubic specimens and numerical simulations of wave motion were conducted to examine the decay in amplitude of ultrasound when impinged by defect, and compare its sensitivity to the delay in travel time. An algorithm was then developed to facilitate simultaneous tracing and distribution of amplitude factor in a three-dimensional model by iterative computation. The algorithm was used for reconstruction of attenuation tomographic for visualizing concrete interior. Experimental results indicated successful identification for the location of a defect that was embedded in concrete, thus implying the potential of attenuation tomography as a complementary method to the travel time tomography to enhance soundness evaluation of concrete.

[1]  Angus I. Best,et al.  The relationships between the velocities, attenuations and petrophysical properties of reservoir sedimentary rocks1 , 1994 .

[2]  Tomoki Shiotani,et al.  Elastic wave validation of large concrete structures repaired by means of cement grouting , 2009 .

[3]  Dan M. Frangopol,et al.  Improved assessment of mass concrete dams using acoustic travel time tomography. Part II — application , 2000 .

[4]  Matthew A. Brzostowski,et al.  3-D tomographic imaging of near‐surface seismic velocity and attenuation , 1992 .

[5]  M. Ohtsu,et al.  Use of acoustic emission and X-ray computed tomography for damage evaluation of freeze-thawed concrete , 2010 .

[6]  Lanbo Liu,et al.  Seismic non-destructive testing on a reinforced concrete bridge column using tomographic imaging techniques , 2005 .

[7]  Tomoki Shiotani,et al.  Effect of Inhomogeneity Parameters on Wave Propagation in Cementitious Material , 2008 .

[8]  Dan M. Frangopol,et al.  Improved assessment of mass concrete dams using acoustic travel time tomography. Part I — theory , 2000 .

[9]  K. Sassa.  SUGGESTED METHODS FOR SEISMIC TESTING WITHIN AND BETWEEN BOREHOLES , 1988 .

[10]  Tomoki Shiotani,et al.  Single-side access tomography for evaluating interior defect of concrete , 2010 .

[11]  K. Luxbacher,et al.  Three-dimensional time-lapse velocity tomography of an underground longwall panel , 2008 .

[12]  Michael Forde,et al.  Ultrasonic tomography of grouted duct post-tensioned reinforced concrete bridge beams , 2001 .

[13]  Youli Quan,et al.  Seismic attenuation tomography using the frequency shift method , 1997 .

[14]  Chaoguang Zhou,et al.  Nonlinear inversion of borehole-radar tomography data to reconstruct velocity and attenuation distribution in earth materials , 2001 .

[15]  T Ross,et al.  Using seismic tomography and holography ground imaging to improve site investigations , 2004 .

[16]  X. Liao,et al.  Development of repetitive corrugation and straightening , 2004 .

[17]  Daryl R. Tweeton,et al.  MIGRATOM : geophysical tomography using wavefront migration and fuzzy constraints , 1994 .

[18]  B Bianco,et al.  Computational methods for ultrasonic bone assessment. , 1999, Ultrasound in medicine & biology.

[19]  Laurence J. Jacobs,et al.  Modeling elastic wave propagation in waveguides with the finite element method , 1999 .

[20]  Tomoki Shiotani,et al.  Evaluation of Repair Effect for Deteriorated Concrete Piers of Intake Dam Using AE Activity , 2006 .

[21]  T. Shiotani,et al.  Repair evaluation of concrete cracks using surface and through-transmission wave measurements , 2007 .

[22]  Erik H. Saenger,et al.  Elastic wave propagation in a segmented X-ray computed tomography model of a concrete specimen , 2010 .