Beat Phenomenon Analysis of Concrete Beam with Piezoelectric Sensors

The focus of this paper is to give a better understanding of beat phenomenon in the free vibration test of a concrete beam with piezoelectric ceramic sensors from the view of mathematics. The cause of beat phenomenon from piezoelectric ceramic sensors embedded in the concrete beam is illustrated and the influence factors of beat phenomenon are discussed. The results show that the beat phenomenon from piezoelectric ceramic sensors in the concrete beam is caused by the coupled responses with similar model frequencies in different directions. The influence factors of beat phenomenon due to damping effect, impact direction, sensor position and sectional dimension are discussed. As the damping ratios increased, the amplitude of beat signal will die out in an exponential decay. Meanwhile, the damping has a tiny influence on the beat frequency of system response, the amplitudes of beat signal both in the time and frequency domain are changed with the variation of impact direction. In addition, the amplitude of beat signal will be also changed with the position of sensors altered. The beat frequency will get more with the greater difference of sectional dimension.

[1]  Fu-Kuo Chang,et al.  Impact identification of stiffened composite panels: I. System development , 2001 .

[2]  Gangbing Song,et al.  Concrete structural health monitoring using embedded piezoceramic transducers , 2007 .

[3]  Jeong-Beom Ihn,et al.  Detection and monitoring of hidden fatigue crack growth using a built-in piezoelectric sensor/actuator network: II. Validation using riveted joints and repair patches , 2004 .

[4]  Huo Lin-sheng.  The beat phenomenon in structural vibration control using circular tuned liquid column dampers , 2010 .

[5]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[6]  Gangbing Song,et al.  Concrete early-age strength monitoring using embedded piezoelectric transducers , 2006 .

[7]  Gangbing Song,et al.  Progressive collapse of a two-story reinforced concrete frame with embedded smart aggregates , 2009 .

[8]  Gangbing Song,et al.  Smart Aggregate-Based Damage Detection of Circular RC columns under Cyclic Combined Loading , 2010 .

[9]  Zhongxian Li,et al.  Application of Cement-Based Piezoelectric Sensors for Monitoring Traffic Flows , 2006 .

[10]  J. Sirohi,et al.  Fundamental Understanding of Piezoelectric Strain Sensors , 1999, Smart Structures.

[11]  Robert E. Seydel.  Impact identification of stiffened composite panels , 2000 .

[12]  Gangbing Song,et al.  An overheight vehicle–bridge collision monitoring system using piezoelectric transducers , 2007 .

[13]  Gangbing Song,et al.  Health monitoring of reinforced concrete shear walls using smart aggregates , 2009 .

[14]  Gangbing Song,et al.  Smart aggregates: multi-functional sensors for concrete structures—a tutorial and a review , 2008 .

[15]  Gangbing Song,et al.  Multi-functional smart aggregate-based structural health monitoring of circular reinforced concrete columns subjected to seismic excitations , 2010 .

[16]  Joseph L. Rose,et al.  Active health monitoring of an aircraft wing with embedded piezoelectric sensor/actuator network: I. Defect detection, localization and growth monitoring , 2007 .

[17]  F. Chang,et al.  Impact identification of stiffened composite panels: II. Implementation studies , 2001 .

[18]  F. Chang,et al.  Detection and monitoring of hidden fatigue crack growth using a built-in piezoelectric sensor/actuator network: I. Diagnostics , 2004 .

[19]  C. I. Tseng,et al.  Distributed piezoelectric sensor/actuator design for dynamic measurement/control of distributed parameter systems: A piezoelectric finite element approach , 1990 .