Characterization of concentrated and distributed cracks in concrete using a harmonic wave modulation technique

Characterization of concentrated and distributed cracks in concrete using a harmonic wave... In this work, the damage progression of concrete cracks presented in concentrated form caused by mechanical load and presented in distributed form caused by chemical attack is characterized by a harmonic wave modulation technique. The relative amplitude of sidebands in frequency domain due to the modulation effect of two propagating ultrasonic waves is considered as the damage index for concrete samples. The low frequency signal in this research is a harmonic wave produced by an electromagnetic exciter to avoid the uncertainty of man-made influence previously where the low frequency pulse signal was generated by the instrumented hammer. Both the first order sideband corresponding to classical nonlinearity effect and the second order sideband corresponding to hysteresis nonlinearity effect are simultaneously analyzed through the ultrasonic experiments for damaged samples induced by the sulfate attack and bending tests. The nonlinear parameters present a good distinction between damaged and intact samples for both concentrated cracks and distributed cracks and have an increase in orders of magnitude, showing the well-round feasibility of developed nonlinear wave modulation technique. Furthermore, the nonlinear parameters in the wave modulation technique present an excellent correlation with the nonlinear parameter obtained by the second harmonic generation method for bending cracks of the same reinforced concrete, indicating that the wave modulation method is capable of discriminating different state of damage presented in concentrated cracking form. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Materials and Structures Springer Journals

Characterization of concentrated and distributed cracks in concrete using a harmonic wave modulation technique

Loading next page...
 
/lp/springer_journal/characterization-of-concentrated-and-distributed-cracks-in-concrete-edFWY0iFjb
Publisher
Springer Netherlands
Copyright
Copyright © 2017 by RILEM
Subject
Engineering; Structural Mechanics; Materials Science, general; Theoretical and Applied Mechanics; Operating Procedures, Materials Treatment; Civil Engineering; Building Materials
ISSN
1359-5997
eISSN
1871-6873
D.O.I.
10.1617/s11527-017-1129-0
Publisher site
See Article on Publisher Site

Abstract

In this work, the damage progression of concrete cracks presented in concentrated form caused by mechanical load and presented in distributed form caused by chemical attack is characterized by a harmonic wave modulation technique. The relative amplitude of sidebands in frequency domain due to the modulation effect of two propagating ultrasonic waves is considered as the damage index for concrete samples. The low frequency signal in this research is a harmonic wave produced by an electromagnetic exciter to avoid the uncertainty of man-made influence previously where the low frequency pulse signal was generated by the instrumented hammer. Both the first order sideband corresponding to classical nonlinearity effect and the second order sideband corresponding to hysteresis nonlinearity effect are simultaneously analyzed through the ultrasonic experiments for damaged samples induced by the sulfate attack and bending tests. The nonlinear parameters present a good distinction between damaged and intact samples for both concentrated cracks and distributed cracks and have an increase in orders of magnitude, showing the well-round feasibility of developed nonlinear wave modulation technique. Furthermore, the nonlinear parameters in the wave modulation technique present an excellent correlation with the nonlinear parameter obtained by the second harmonic generation method for bending cracks of the same reinforced concrete, indicating that the wave modulation method is capable of discriminating different state of damage presented in concentrated cracking form.

Journal

Materials and StructuresSpringer Journals

Published: Dec 20, 2017

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off