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论文类型： 期刊论文

发表时间： 2018-05-01

发表刊物： STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL

收录刊物： SCIE

卷号： 17

期号： 3

页面范围： 461-471

ISSN号： 1475-9217

关键字： Electro-mechanical impedance; piezoelectric materials; fiber-reinforced polymer; reinforced concrete; debonding

摘要： For reinforced concrete structures, the use of fiber-reinforced polymer rebars to replace the steel reinforcement is a topic that is receiving increasing attention, especially where corrosion is a serious issue. However, fiber-reinforced polymer rebar-reinforced concrete always carries the risk of structural failure initiated from the debonding damage that might occur at the reinforcement-concrete interface. This study employed an electro-mechanical impedance-based structural health monitoring technique by applying lead-zirconate-titanate ceramic patches to detect the debonding damage of a carbon fiber-reinforced polymer rebar reinforced concrete. In the experimental study, a carbon fiber-reinforced polymer rebar reinforced concrete specimen was fabricated and it was subjected to a pullout test to initiate the debonding damage at the reinforcement-concrete interface. The impedance and admittance signatures were measured from an impedance analyzer according to the different debonding conditions between the reinforcement and the concrete. Statistical damage metrics, root-mean-square deviation and mean absolute percentage deviation, were used to quantify the changes in impedance signatures measured at the lead-zirconate-titanate patches due to debonding conditions. The results illustrated the capability of the electro-mechanical impedance-based structural health monitoring technique for detecting the debonding damage of fiber-reinforced polymer rebar-reinforced concrete structures.