Huynh Thanh-Canh, Ho Duc-Duy, Dang Ngoc-Loi, Kim And Jeong-Tae
Faculty of Civil Engineering, Duy Tan University, 03 Quang Trung, Hai Chau, Danang 550000, Vietnam.
Center for Construction, Mechanics and Materials, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Hai Chau, Danang 550000, Vietnam.
Sensors (Basel). 2019 Aug 23;19(17):3670. doi: 10.3390/s19173670.
This study presents a set of experimental and numerical investigations to study the sensitivity of the piezoelectric-based smart interface device to structural damage in a bolted connection. The study aims to identify the proper geometric sizes of smart interfaces for damage detection tasks. First, the fundamentals of the damage monitoring technique via lead zirconate titanate(PZT) interface is briefly described for a bolted connection. Second, a lab-scaled girder connection is selected as the test structure for the experimental investigation. PZT interface prototypes with varying geometric sizes are designed for the test connection. Under the bolt-loosening inflicted in the connection, the impedance responses of the PZT interfaces are analyzed to understand the effect of geometric parameters on the damage sensitivity of the impedance responses. Subsequently, the bolt-loosening detection capabilities of the PZT interfaces are comparatively evaluated for identifying the proper geometric sizes of the devices. Finally, a finite element model of the PZT interface-bolted connection system is established for the numerical investigation. The damage sensitivity of the numerical impedance responses is compared with the experimental results for the verification.
本研究开展了一系列实验和数值研究，以探究基于压电的智能接口装置对螺栓连接结构损伤的敏感性。该研究旨在确定用于损伤检测任务的智能接口的合适几何尺寸。首先，简要描述了通过锆钛酸铅（PZT）接口进行损伤监测技术的基本原理，用于螺栓连接。其次，选择一个实验室规模的梁连接作为实验研究的测试结构。为测试连接设计了具有不同几何尺寸的PZT接口原型。在连接中施加螺栓松动的情况下，分析PZT接口的阻抗响应，以了解几何参数对阻抗响应损伤敏感性的影响。随后，对PZT接口的螺栓松动检测能力进行比较评估，以确定装置的合适几何尺寸。最后，建立了PZT接口-螺栓连接系统的有限元模型进行数值研究。将数值阻抗响应的损伤敏感性与实验结果进行比较以进行验证。
