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A Novel Magnetostriction Based Sensing Technology for Rapid Condition Assessment of Bridge Decks

Description :  

A recent report citing the federal National Bridge Inventory reveals that more than 65,000 U.S. bridges require a total of 3.6 trillion dollars by 2020 to repair structural deficiencies. In addition to this issue, current ultrasonic measures of condition assessment prove to be inadequate in certain situations, particularly involving rough surfaces. The investigators of this research propose to develop a novel method of non-contact bridge deck condition assessment through ultrasonic stress wave generation. By extending previous research on magnetostrictive materials in Plexiglass and Aluminum to concrete slabs, the investigators aim to develop rapid and contactless condition assessment of concrete decks. This extension may involve embedding strips of nickel plates on concrete surfaces, or through the development of a novel magnetically responsive concrete by mixing Portland cement with additives like Terfenol-D powder. Magnetically responsive concrete bridge decks MAY therefore provide the potential to: utilize ultrasonic methods for non-contact inspection for voids, cracks, delaminations, and evaluate the structural integrity of bridges.

Principal Investigator:  Jaganathan, Arun  --  Civil Engineering and Construction Engineering Technology
Collaborators:  Simicevic, N.
Funding Agencies:  LTRC
Amount Awarded:  30,000

Start Period:  07/01/2014 End Period:  06/30/2015
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November 16th, 2018

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