Bonding performance monitoring between CFRP and timber column interfaces based on piezoelectric ceramics. (1st February 2023)

• Record Type: Journal Article
• Authors: Yang, Wenwei; Lv, Bowen; Meng, Huien; Yang, Xia
• Is Part Of: Smart materials and structures. Volume 32:Number 2(2023)
• Publication Date: 2023-02-01
• Subjects: structural health monitoring -- timber structure -- bond strength -- wavelet packet analysis -- short-time Fourier transform; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/1361-665X/acae0f
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: To address the problem that carbon fibre reinforced polymer (CFRP) composite material is not easy to directly measure the bond strength of the CFRP-timber column interface during the process of strengthening timber column, a real-time monitoring method of CFRP-timber interface bond strength based on piezoelectric ceramic active sensing is proposed to determine the interface bond strength directly from the structural response signal. A total of 15 specimens were designed for the active monitoring test and tensile test, and the monitoring signals at different enhancement times were compared and analysed using wavelet packets, power spectral density, and short-time Fourier transform, and it was found that the amplitude and power spectral density of the signals increased as the reinforcement time increased. The mapping relationship between wavelet packet energy and bond strength is obtained, providing a more efficient and robust way of monitoring the bond strength between CFRP and timber columns during reinforcement.