Multi-Functional Smart Aggregate-Based Structural Health Monitoring of Circular Reinforced Concrete Columns Subjected to Seismic Excitations

Gu, Hua; Moslehy, Yashar; Sanders, David H.; Song, Gangbing; Mo, Y. L.

doi:10.1061/41096(366)272

Cited by 39 publications

(43 citation statements)

References 9 publications

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“…Guo and Kundu [19] designed a new sensor and proposed a technique to detect anomalies inside the long pipe wall at a specific depth by selecting an appropriate lamb wave mode. As an important stress wave based method, active sensing using piezoceramic transducers receives an increase amount attention in real-time damage detection and structural health monitoring [20][21][22][23][24]. Recently, the active sensing method was extended to detection of a single crack on a pipe structure [25].…”

Section: Introductionmentioning

confidence: 99%

Damage detection of pipeline multiple cracks using piezoceramic transducers

Du¹,

Huo²,

Kong³

et al. 2016

J. vibroeng.

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Abstract.To study the feasibility of detecting pipeline multi-cracks damage using piezoceramic transducers, the electromechanical impedance method and the stress wave based active sensing method were used respectively to perform the damage detection of pipeline with multi-cracks. In this research, the lead zirconate titanate (PZT) type transducers were used due to its strong piezoelectric effect and low cost. During the experiments, two artificial cracks on the pipeline specimen were created, ranging from 0 mm to 9 mm, and seven different operating conditions were generated for each artificial crack. In the monitoring test, for the electromechanical impedance method, the damage index based on Root Mean Square Deviation (RMSD) was used, and for the active sensing method, the damage index based on Wavelet Packet Energy Loss (WPEL) was used. In addition, the relationship between the crack depth and RMSD as well as the relationship between the crack depth and location and WPEL were analyzed. The results show that RMSD and WPEL indices increase with the increase of the depth of pipeline cracks. In addition, the WPEL index increases with the appearance of new cracks. Quantitative analysis of pipeline crack damage can be realized by electromechanical impedance method, and localization analysis on the pipeline multi-cracks damage can be achieved by stress wave method based on sensor arrays.

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Section: Introductionmentioning

confidence: 99%

Damage detection of pipeline multiple cracks using piezoceramic transducers

Du¹,

Huo²,

Kong³

et al. 2016

J. vibroeng.

Self Cite

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“…Piezoceramics with such attractive features as low cost, small size, wide bandwidth, and sensing and actuating functions have been widely researched in real-time active vibration control [6][7][8], stress-wave based communication [9][10][11], and structural health monitoring [12][13][14][15][16]. Another attractive feature of a piezoceramic transducer is the coupling between its electric impedance and the host structure's mechanical impedance.…”

Section: Introductionmentioning

confidence: 99%

A Smart Washer for Bolt Looseness Monitoring Based on Piezoelectric Active Sensing Method

et al. 2016

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Piezoceramic based active sensing methods have been researched to monitor preload on bolt connections. However, there is a saturation problem involved with this type of method. The transmitted energy is sometimes saturated before the maximum preload which is due to it coming into contact with flat surfaces. When it comes to flat contact surfaces, the true contact area will easily saturate with the preload. The design of a new type of bolt looseness monitoring sensor, a smart washer, is to mitigate the saturation problem. The smart washer is composed of two annular disks with contact surfaces that are machined into convex and concave respectively, to eliminate the complete flat contact surfaces and to reduce the saturation effect. One piezoelectric patch is bonded on the non-contact surface of each annular disk. These two mating annular disks form a smart washer. One of the two piezoelectric patches serves as an actuator to generate an ultrasonic wave that propagates through the contact surface; the other one serves as a sensor to detect the propagated waves. The wave energy propagated through the contact surface is proportional to the true contact area which is determined by the bolt preload. The time reversal method is used to extract the peak of the focused signal as the index of the transmission wave energy; then, the relationship between the signal peak and bolt preload is obtained. Experimental results show that the focused signal peak value changes with the bolt preload and presents an approximate linear relationship when the saturation problem is experienced. The proposed smart washer can monitor the full range of the rated preload.

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“…A cement-based smart aggregate (SA) with a 33 -mode lead zirconate titanate (PZT) patch embedded in it was proposed by Song et al [11]. By evaluating the wave propagation among SAs, it can detect the cracking level of the structure in a qualitative manner [12][13][14][15]. The application of SA has also been extended to measure the compressive stress monitoring by calibrating the SA to only relatively low stress levels [16,17].…”

Section: Introductionmentioning

confidence: 99%

A SA-Based Wireless Seismic Stress Monitoring System for Concrete Structures

Hou

Zhang

et al. 2013

International Journal of Distributed Sensor Networks

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A PZT-based smart aggregate (SA) is capable of full process stress monitoring during earthquakes. A wired seismic monitoring system is prone to failure during earthquakes. Therefore, it is extremely necessary to use the wireless monitoring technique in the SAbased monitoring system. In this paper, the SA is integrated with the ZigBee wireless network which consists of a charge-to-voltage converter, a microprocessing unit, a wireless transmission unit, a base station, and a host computer. The dynamic loading scheme is applied on the SA and the output signal is measured by the wireless system and the wired system in parallel. The performance of the proposed wireless monitoring system is validated by comparing the wired and wireless signals. It is anticipated that this research will demonstrate the potential of using wireless monitoring systems for full damage process monitoring of concrete structures.

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Multi-Functional Smart Aggregate-Based Structural Health Monitoring of Circular Reinforced Concrete Columns Subjected to Seismic Excitations

Cited by 39 publications

References 9 publications

Damage detection of pipeline multiple cracks using piezoceramic transducers

Damage detection of pipeline multiple cracks using piezoceramic transducers

A Smart Washer for Bolt Looseness Monitoring Based on Piezoelectric Active Sensing Method

A SA-Based Wireless Seismic Stress Monitoring System for Concrete Structures

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