Liu Yang liuyangbridge@163.com 1 https://orcid.org/0000-0002-5911-979X Zhang Ming zhangmingbridge@163.com 1 https://orcid.org/0000-0002-0810-263X Yin Xinfeng yinxinfeng@163.com 1 Hei Chuang heichuang@yangtzeu.edu.cn 2 Wang Lei leiwang@csust.edu.cn 1 Samborski Sylwester 1 School of Civil Engineering Changsha University of Science and Technology Changsha 410114 China csust.edu.cn 2 Department of Mechanical Engineering University of Houston Houston TX 77204 USA uh.edu 2019 3 10 2019 2019 02 08 2019 09 09 2019 3 10 2019 2019 Copyright © 2019 Yang Liu et al. This is an open access article distributed under the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. An active sensing approach using piezoceramic induced stress wave is proposed to provide monitoring and early warning for the development of interface debonding damage of precast segmental concrete beams (PSCBs). Three concrete specimens with toothed interfaces were fabricated and bonded with high-strength epoxy resin adhesive to form PSCBs. Smart aggregates (SAs) embedded in concrete specimens are used as actuators and sensors. The PSCBs are subjected to periodic loading with hydraulic jack to test the different degrees of debonding damage. The experimental results of time-domain and frequency-domain analysis clearly show that the amplitude of the signal received by the piezoceramic sensor is reduced when debonding crack occurs. The energy analysis and damage index based on wavelet packet can be used to determine the existence and severity of interface debonding damage in PSCBs. The experimental research validates the feasibility of monitoring the interface debonding damage in PSCBs using SA transducers based on active sensing technique. Major State Basic Research Development Program of China 2015CB057704 National Natural Science Foundation of China 51378081 Natural Science Foundation of Hunan Province 2019JJ40313 Hunan Provincial Innovation Foundation for Postgraduate CX20190651
The authors are grateful for the partial financial support received from the Major State Basic Research Development Program of China (973 Program, grant no. 2015CB057704), the National Natural Science Foundation of China (grant no. 51378081), the Natural Science Foundation of Hunan Province (grant no. 2019JJ40313), and the Hunan Provincial Innovation Foundation for Postgraduates (CX20190651).
