Application of PZT sensors to damage detection of concrete beam & shear wall.

• Main Authors: Nung-Yin Huang, 黃農尹
• Other Authors: Wen-I Liao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/hvjb9v

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 100 === In this research,the smart piezoelectric sensors have been applied to the damage detections of concrete beam and shear wall. Comparison of Pre-embedded in the smart aggregate sensors and post-embedded in the smart aggregate sensors what is the difference. The adopted smart sensors of this research are fabricated by piezoceramic materials. Base on the wave propagation theory and the sensor can be used as actuator and receiver for sending and receiving stress waves to monitor the health state of the concrete structures. The first test was development of technique for early-age strength monitoring of concrete beam. The second test was a shake table test of a reinforced shear wall. A piezoceramic-based device, called smart aggregate, was pre-embedded and adopted for the structural health monitoring of the concrete frame under earthquake excitations. By analyzing the wave response, the existence of crack can be detected and the severity can be estimated. The experimental results demonstrate the sensitiveness and the effectiveness of the piezoceramic-based approach in the structural health monitoring of concrete structures under earthquake loading. This is a new detection method for civil engineering structures on non-destructive testing.