Title
Damage Mode Identification of CFRP-Strengthened Beam Based on Acoustic Emission Technique
Author
Pan, Tanbo (Tongji University)
Zheng, Yonglai (Tongji University)
Zhou, Y. (TU Delft Concrete Structures)
Wu, Zhuorui (Tongji University)
Zhou, Yujue (Tongji University)
Contributor
Ilki, Alper (editor)
Çavunt, Derya (editor)
Çavunt, Yavuz Selim (editor)
Date
2023
Abstract
Externally bonded (EB) carbon fiber reinforced polymer (CFRP) is widely used in structural strengthening and retrofitting. Premature debonding of the FRP severely limits the efficiency of CFRP utilization. The application of CRRP anchorage system offers a solution to the debonding problem. However, the understanding of damage mode identification of this combined system still remains elusive. Acoustic emission (AE) technique is employed to identify the damage mode of this CFRP anchorage system, due to its high sensitivity and the ability to detect damage in real-time. The objective of the current study is to identify the failure mechanisms of CFRP-strengthened beam by applying advanced pattern recognition techniques to the collected AE data. Firstly, four-point test of CFRP-strengthened beam was carried out until failure with simultaneous recording of AE signals. Then, correlation analysis was adopted to select the AE characteristic parameters, and principal component analysis (PCA) was used for dimensionality reduction. Lastly, the AE signals of the CFRP-strengthened beam was clustered to track the evolutionary behavior of the different damage modes by Gaussian mixture model (GMM) algorithm. Three main damage modes of CFRP-strengthened beam were identified by GMM clustering: concrete cracking, debonding of CFRP sheet and fracture of CFRP sheet. This study explores the damage evolution mechanism of combined system and provides a basis for achieving health monitoring of CFRP-strengthened structures.
Subject
Acoustic emission
CFRP anchorage system
Damage mode identification
Gaussian mixed model clustering
Principal component analysis
To reference this document use:
http://resolver.tudelft.nl/uuid:0119ce73-6c43-44bf-ac51-6769ed0cd767
DOI
https://doi.org/10.1007/978-3-031-32511-3_58
Publisher
Springer
Embargo date
2023-12-03
ISBN
978-3-031-32510-6
Source
Building for the Future: Durable, Sustainable, Resilient.: Proceedings of the fib Symposium 2023 - Volume 2, 350
Event
International Symposium of the International Federation for Structural Concrete, fib Symposium 2023, 2023-06-05 → 2023-06-07, Istanbul, Turkey
Series
Lecture Notes in Civil Engineering, 2366-2557, 350 LNCE
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2023 Tanbo Pan, Yonglai Zheng, Y. Zhou, Zhuorui Wu, Yujue Zhou