Corrosion monitoring of post‐tensioned concrete structures using fractal analysis of guided ultrasonic waves

SUMMARY This work presents a new approach based on fractal analysis of guided ultrasonic waves (GUWs) for monitoring the corrosion evolutionary path in post-tensioned systems. Fractal analysis is a new scientific paradigm that has been used successfully in many fields including biological and physical sciences. However, its application in the SHM community has been modest. The proposed approach utilizes piezoelectric transducers, permanently attached to the steel tendon, to transmit and receive GUWs. The corrosion monitoring is performed through the examination of the fractal dimension of GUW measurements over time. Accelerated corrosion tests were carried out on two 7 wire steel strands embedded in two concrete blocks to validate the proposed system. Finally, an outlier detection algorithm is proposed to enhance the sensitivity of the technique to the corrosion-induced damage. Copyright © 2013 John Wiley & Sons, Ltd.

[1]  S. Zucker,et al.  Evaluating the fractal dimension of profiles. , 1989, Physical review. A, General physics.

[2]  Salvatore Salamone,et al.  Detection of Initial Yield and Onset of Failure in Bonded Posttensioned Concrete Beams , 2012 .

[3]  James Theiler,et al.  Estimating fractal dimension , 1990 .

[4]  Francesco Lanza di Scalea,et al.  Wavelet-based outlier analysis for guided wave structural monitoring: Application to multi-wire strands , 2007 .

[5]  B. Hillemeier,et al.  Capacity of the remanent magnetism method to detect fractures of steel in tendons embedded in prestressed concrete , 1997 .

[6]  S. Salamone,et al.  Guided-wave Health Monitoring of Aircraft Composite Panels under Changing Temperature , 2009 .

[7]  Henrique M Reis,et al.  Longitudinal guided waves for monitoring corrosion in reinforced mortar , 2008 .

[8]  T. Kundu,et al.  A new guided wave–based technique for corrosion monitoring in reinforced concrete , 2013 .

[9]  Brian Litt,et al.  A comparison of waveform fractal dimension algorithms , 2001 .

[10]  Sun-Kyu Cho,et al.  Acoustic Emission Technique for Detection of Corrosion-Induced Wire Fracture , 2005 .

[11]  Keith Worden,et al.  DAMAGE DETECTION USING OUTLIER ANALYSIS , 2000 .

[12]  H. Zejli,et al.  Detection of the Broken Wires in the Cables’ Hidden Parts (Anchorings) by Acoustic Emission , 2006 .

[13]  Vic Barnett,et al.  Outliers in Statistical Data , 1980 .

[14]  Neil G. Thompson,et al.  CORROSION COST AND PREVENTIVE STRATEGIES IN THE UNITED STATES , 2002 .

[15]  Benoit B. Mandelbrot,et al.  Fractal Geometry of Nature , 1984 .

[16]  Peter Cawley,et al.  ULTRASONIC GUIDED WAVES FOR INSPECTION OF GROUTED TENDONS AND BOLTS , 2003 .

[17]  D. Narayana Dutt,et al.  Computing Fractal Dimension of Signals using Multiresolution Box-counting Method , 2010 .

[18]  Nacim Betrouni,et al.  Fractal and multifractal analysis: A review , 2009, Medical Image Anal..

[19]  Salvatore Salamone,et al.  Use of Interwire Ultrasonic Leakage to Quantify Loss of Prestress in Multiwire Tendons , 2011 .

[20]  Hideki Takayasu,et al.  Fractals in the Physical Sciences , 1990 .

[21]  Andrew S. Whittaker,et al.  Acoustic emission monitoring of a reinforced concrete shear wall by b-value–based outlier analysis , 2013 .

[22]  B. Mandelbrot.  How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension , 1967, Science.

[23]  A. Whittaker,et al.  Damage Assessment of Reinforced Concrete Structures Using Fractal Analysis of Residual Crack Patterns , 2013 .

[24]  Al Ghorbanpoor,et al.  MAGNETIC-BASED NDE OF PRESTRESSED AND POST-TENSIONED CONCRETE MEMBERS -- THE MFL SYSTEM , 2000 .

[25]  Mahmoud A. Issa,et al.  Fractal dimension––a measure of fracture roughness and toughness of concrete , 2003 .

[26]  Daniel A. Kuchma,et al.  Estimation of general corrosion damage to steel reinforced mortar using frequency sweeps of guided mechanical waves , 2006 .

[27]  Charles C. Taylor,et al.  Estimating the dimension of a fractal , 1991 .

[28]  Song Shoupeng,et al.  A fractal-dimension-based signal-processing technique and its use for nondestructive testing , 2007 .

[29]  Salvatore Salamone,et al.  Fractal dimension–based Lamb wave tomography algorithm for damage detection in plate-like structures , 2012 .

[30]  P Matt,et al.  NON-DESTRUCTIVE EVALUATION AND MONITORING OF POST-TENSIONING TENDONS , 2001 .