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Appl. Sci. 2016, 6(11), 341; doi:10.3390/app6110341

Cyclic Crack Monitoring of a Reinforced Concrete Column under Simulated Pseudo-Dynamic Loading Using Piezoceramic-Based Smart Aggregates

1
Department of Mechanical Engineering, University of Houston, 4800 Calhoun RD, Houston, TX 77204, USA
2
Energo Engineering (A KBR Company), 1300 W Sam Houston Parkway South, Suite 100, Houston, TX 77042, USA
3
School of Engineering and Applied Science, George Washington University, Science & Engineering Hall, 800 22nd Street, NW, Washington, DC 20052, USA
4
Department of Civil and Environmental Engineering, University of Houston, 4800 Calhoun RD, Houston, TX 77204, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Gangbing Song
Received: 21 September 2016 / Revised: 2 November 2016 / Accepted: 2 November 2016 / Published: 8 November 2016
(This article belongs to the Special Issue Structural Health Monitoring (SHM) of Civil Structures)
View Full-Text   |   Download PDF [3529 KB, uploaded 8 November 2016]   |  

Abstract

Structural health monitoring is an important aspect of maintenance for bridge columns in areas of high seismic activity. In this project, recently developed piezoceramic-based transducers, known as smart aggregates (SA), were utilized to perform structural health monitoring of a reinforced concrete (RC) bridge column subjected to pseudo-dynamic loading. The SA-based approach has been previously verified for static and dynamic loading but never for pseudo-dynamic loading. Based on the developed SAs, an active-sensing approach was developed to perform real-time health status evaluation of the RC column during the loading procedure. The existence of cracks attenuated the stress wave transmission energy during the loading procedure and reduced the amplitudes of the signal received by SA sensors. To detect the crack evolution and evaluate the damage severity, a wavelet packet-based structural damage index was developed. Experimental results verified the effectiveness of the SAs in structural health monitoring of the RC column under pseudo-dynamic loading. In addition to monitoring the general severity of the damage, the local structural damage indices show potential to report the cyclic crack open-close phenomenon subjected to the pseudo-dynamic loading. View Full-Text
Keywords: cyclic crack monitoring; smart aggregate; active sensing; wavelet packet-based damage index cyclic crack monitoring; smart aggregate; active sensing; wavelet packet-based damage index
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kong, Q.; Robert, R.H.; Silva, P.; Mo, Y.L. Cyclic Crack Monitoring of a Reinforced Concrete Column under Simulated Pseudo-Dynamic Loading Using Piezoceramic-Based Smart Aggregates. Appl. Sci. 2016, 6, 341.

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