Design of a d33-mode piezocomposite electricity generating element and its application to bridge monitoring
来源期刊：中南大学学报(英文版)2014年第7期
论文作者：Jinkyo F. Choo Van Lai Pham Nam Seo Goo
文章页码：2572 - 2578
Key words：piezocomposite electricity generating element; d33-mode; bridge bearing; traffic monitoring
Abstract: The piezoelectric effect is used in sensing applications such as in force and displacement sensors. However, the brittleness and low performance of piezoceramic lead zirconate titanate (PZT) often impede its applicability in civil structures which are subjected to large loads. The concept of a piezocomposite electricity generating element (PCGE) has been proposed for improving the electricity generation performance and overcoming the brittleness of piezoceramic wafers. The post-curing residual stress in the PZT layer constitutes a main reason for the PCGE’s enhanced performance, and the outer epoxy-based composites protect the brittle PZT layer. A d33-mode PCGE designed for bridge monitoring application was inserted in a bridge bearing to provide a permanent and simple weigh-in-motion system. The designed PCGEs were tested through a series of tests including fatigue and dynamic tests to verify their applicability for monitoring purposes in a bridge structure. A simple beam example was presented to show the applicability of the proposed bridge bearing equipped with the PCGE for adequately measuring the traffic loads.
Jinkyo F. Choo1, Van Lai Pham2, Nam Seo Goo2
(1. Department of Civil Engineering, Konkuk University, Seoul 143-701, Korea;
2. Department of Advanced Technology Fusion, Division of Interdisciplinary Studies,
Konkuk University, Seoul 143-701, Korea)
Abstract:The piezoelectric effect is used in sensing applications such as in force and displacement sensors. However, the brittleness and low performance of piezoceramic lead zirconate titanate (PZT) often impede its applicability in civil structures which are subjected to large loads. The concept of a piezocomposite electricity generating element (PCGE) has been proposed for improving the electricity generation performance and overcoming the brittleness of piezoceramic wafers. The post-curing residual stress in the PZT layer constitutes a main reason for the PCGE’s enhanced performance, and the outer epoxy-based composites protect the brittle PZT layer. A d33-mode PCGE designed for bridge monitoring application was inserted in a bridge bearing to provide a permanent and simple weigh-in-motion system. The designed PCGEs were tested through a series of tests including fatigue and dynamic tests to verify their applicability for monitoring purposes in a bridge structure. A simple beam example was presented to show the applicability of the proposed bridge bearing equipped with the PCGE for adequately measuring the traffic loads.
Key words:piezocomposite electricity generating element; d33-mode; bridge bearing; traffic monitoring
