Use of Air-Coupled Sensing in the Assessment of Bridge Deck Delamination and Cracking

4th International Conference on Road and Rail Infrastructure (CETRA 2016)

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Field Value
 
Title Use of Air-Coupled Sensing in the Assessment of Bridge Deck Delamination and Cracking
 
Creator Nenad Gucunski; Rutgers University Civil and Environmental Engineering
Seong-Hoon Kee; Dong-A University, Department of Architectural Engineering
Basily Basily; Rutgers University Civil and Environmental Engineering
Jinyoung Kim; Rutgers University, Center for Advanced Infrastructure and Transportation
Ali Maher; Rutgers University, Center for Advanced Infrastructure and Transportation
 
Subject bridge decks; delamination; cracks; impact echo; surface waves; air-coupled sensors; microphones
 
Description Air-coupled acoustic sensing opens opportunities to dramatically increase the speed of data collection. The evaluation of feasibility of air-coupled sensing led to the development and implementation of a prototype air-coupled ultrasonic system (ACUS) for simultaneous collection of impact-echo and surface wave data in concrete bridge decks. The basic sensor unit of ACUS is a hexagonal air-coupled sensor array, which includes a solenoid-driven impact source at the center and six air-coupled sensors (ACSs) with parabolic acoustic reflectors (PARs) at vertices of the hexagon. Primary interests of air-coupled acoustic testing are related to detection of delamination using impact echo (IE), and measurement of concrete modulus and evaluation of depth of vertical cracks using surface wave testing. The performance of the hexagonal arary was evaluated on a validation bridge containing numerous artifical defects (delaminations, surface-breaking cracks, segregated aggregates, partially grouted tendon ducts, and accelerated corrosion test regions). The results from performance evaluation on delaminated and cracked sections of the validation bridge are presented.
 
Publisher CETRA 2016
 
Contributor
 
Date 2017-02-28 15:19:05
 
Type Peer-reviewed Paper
 
Identifier http://master.grad.hr/cetra/ocs/index.php/cetra4/cetra2016/paper/view/576
 
Source CETRA 2016; 4th International Conference on Road and Rail Infrastructure
 
Language en
 
Rights Authors who submit to this conference agree to the following terms:<br /> <strong>a)</strong> Authors retain copyright over their work, while allowing the conference to place this unpublished work under a <a href="http://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</a>, which allows others to freely access, use, and share the work, with an acknowledgement of the work's authorship and its initial presentation at this conference. <br /> <strong>b)</strong> Submitted full papers will be published in the book of proceedings "Road and Rail Infrastructure IV" as well as in digital form (on a CD). Conference organiser is allowed to publish author's names, institution and country as well as the paper abstract on the conference web site.
 

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