Damage Assessment in Concrete Structures using PZT patches

Narayanan, A and K V L, Subramaniam (2015) Damage Assessment in Concrete Structures using PZT patches. In: 2nd RN Raikar Memorial International Conference & Banthia-Basheer International Symposium on Advances in Science & Technology of Concrete, 18-19 December, 2015, The Lalit, Mumbai.

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Piezoelectric based PZT smart sensors offer significant potential for continuously monitoring the development and progression of internal damage in concrete structures. PZT-based damage sensors consisting of piezo-electric patches, which are bonded to the surface of a concrete structure can be developed for assessing the damage progression of concrete members. The primary challenge in developing a PZT-based sensor lies in developing a methodology to infer about the level of damage in the material from measurement. Changes in the resonant behavior in the measured electrical conductance obtained from electro-mechanical (EM) response of a PZT bonded to a concrete substrate is investigated for increasing levels of damage. The sensitivity of EM impedance- based measurements to level of damage in concrete is reported. Incipient damage in the form of microcracks in the concrete substrate produces a change in the electrical conductance signature associated with the resonant peaks. Changes in the conductance resonant signature from EM conductance measurement are detected before visible signs of cracking. The root mean square deviation of the conductance signature at resonant peaks is shown to accurately reflect the level of damage in the substrate. The findings presented here provide a basis for developing a sensing methodology using PZT patches for continuous monitoring of concrete structures.

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IITH Creators:
IITH CreatorsORCiD
K V L, Subramaniamhttp://orcid.org/0000-0002-5995-0911
Item Type: Conference or Workshop Item (Paper)
Subjects: Civil Engineering > Standards
Civil Engineering > Soil Structure Interaction
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 19 Jan 2016 04:40
Last Modified: 05 Jul 2017 10:15
URI: http://raiith.iith.ac.in/id/eprint/2129
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