Crack Detection and Quantification in Beams Using Wavelets
IR@SERC: CSIR-Structural Engineering Research Centre, Chennai
View Archive Info| Field | Value | |
| Title |
Crack Detection and Quantification in Beams Using Wavelets
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| Creator |
Umesha, P.K.
Ravichandran, R. Sivasubramanian, K. |
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| Subject |
Crack initiation
Crack detection Beams using wavelets Damage structure Wavelet coefficient Parametric study Instrumentation |
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| Description |
A new method has been proposed to detect
the location and also to quantify the crack using the de-
flection response of the damaged beams alone. The de-
flection is measured at a particular point for various lo-
cations of a concentrated load on the beam. This static
deflection profile is used as the input signal for wavelet
(Symlet) analysis. Due to variation in deflection at some
points, compared to their adjacent points, peaks are seen
in the wavelet coefficient (WC) plot. These peak points
are identified as damage points along the length of the
beam. The peaks can also be seen at sensor point and
supports. These can be eliminated by performing wavelet
analysis for the deflection profile measured at another
point. In a real damaged structure, it is very difficult to
measure deflection at several points, as a large amount of
instrumentation needs to be installed to measure the re-
sponse. This practical difficulty can be avoided by mini-
mizing the number of measuring points in the field as ex-
plained in the present work. A parametric study has been
carried out by varying the damage, location of damage,
intensity of load, flexural rigidity, and length of the beam.
It has been observed that the WCs change with variations
in damage, location of damage, intensity of load, flexural
rigidity, and length of the beam. A generalized curve has
been proposed to quantify the damage in a fixed beam
by taking envelop of all maximum WCs of the deflection
response measured at damage points.
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| Date |
2009
2009 2009 |
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| Type |
Article
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| Identifier |
Journal of Computer-Aided Civil and Infrastructure Engineering, Vol.24, 2009, pp. 593-607
http://hdl.handle.net/123456789/442 |
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| Language |
en
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| Rights |
It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
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| Publisher |
Wiley - Blackwell
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