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发布时间：2019-03-11

论文类型：会议论文

发表时间：2012-11-17

收录刊物：Scopus、CPCI-S、EI

页面范围：243-248

关键字：Smart aggregates; PZT; compressive stress; degradation

摘要：A smart aggregate(SA) using PZT material as the sensing element for compressive seismic stress monitoring is developed in this paper. The sensor consists of a piece of PZT sheet sandwiched by a pair of stone blocks through epoxy. Investigation of the sensors performance involves of the loading scheme in which the alternating stress superimposed on the compressive pre-stress are applied on the smart aggreagate by the servohydraulic test machine. The polarization process of the selected PZT material under pre-stress is investigated to decide the waiting time before calibration. The degradation of piezoelectric coefficient of PZT under pre-stress in range of 0-24MPa is evaluated.