Nondestructive Monitoring Techniques for Crack Detection and Localization in RC Elements
TLDR
In this paper, the structural and damage assessment of a reinforced concrete (RC) beam subjected to a four-point bending test until yielding of reinforcing steel was performed using different NDT techniques.Abstract:
This paper presents the structural and damage assessment of a reinforced concrete (RC) beam subjected to a four-point bending test until yielding of reinforcing steel. The deterioration progress was monitored using different nondestructive testing (NDT) techniques. The strain was measured by distributed fiber optic sensors (FOSs), embedded prior to concrete pouring. The initiation and propagation of cracks were monitored by acoustic emission (AE) sensors attached to the surface of the material. The recorded AE activity results in good agreement with FOS strain measurements. The results of the integrated monitoring system are confirmed by visual observation of the actual crack pattern. At different loading steps, digital image correlation (DIC) analysis was also conducted.read more
Citations
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Integration of piezoelectric transducers (PZT and PVDF) within polymer-matrix composites for structural health monitoring applications: new success and challenges
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A Fuzzy Similarity-Based Approach to Classify Numerically Simulated and Experimentally Detected Carbon Fiber-Reinforced Polymer Plate Defects
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Pressure test of a prestressed concrete cylinder pipe using distributed fiber optic sensors: Instrumentation and results
TL;DR: In this article , the authors presented an approach for measuring and visualizing the strain and loading responses of a pressurized prestressed concrete cylinder pipe (PCCP) using distributed fiber optic sensors based on optical frequency domain reflectometry (OFDR).
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Analysis of Crack Width Development in Reinforced Concrete Beams.
TL;DR: In this paper, the authors presented the results of a study of 10 single-span reinforced concrete beams to follow the process of crack formation and changes in their width, and confirmed that the distances between cracks do not depend on the loading manner.
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Acoustic Emission for Evaluating the Reinforcement Effectiveness in Steel Fiber Reinforced Concrete
TL;DR: In this paper, steel fiber reinforced concrete (SFRC) beams were tested in bending with simultaneous acoustic emission (AE) monitoring, and the results showed that the AE behavior at low load levels is very indicative of the amount of reinforcement and consequently, of the final mechanical properties.
References
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An introduction to structural health monitoring
Charles R. Farrar,Keith Worden +1 more
TL;DR: Technical challenges that must be addressed if SHM is to gain wider application are discussed in a general manner and the historical overview and summarizing the SPR paradigm are provided.
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Applications of digital-image-correlation techniques to experimental mechanics
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Ncorr: Open-Source 2D Digital Image Correlation Matlab Software
TL;DR: Ncorr is an open-source subset-based 2D DIC package that amalgamates modern DIC algorithms proposed in the literature with additional enhancements and several applications of Ncorr that both validate it and showcase its capabilities are discussed.
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Recent progress in Brillouin scattering based fiber sensors.
Xiaoyi Bao,Liang Chen +1 more
TL;DR: The progress on improving sensing performance parameters like spatial resolution, sensing length limitation and simultaneous temperature and strain measurement is reviewed.
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Assessing Damage of Reinforced Concrete Beam using b -value Analysis of Acoustic Emission Signals
TL;DR: In this paper, a b-value analysis was carried out on data recorded during a laboratory test on a reinforced concrete beam designed as representative of a bridge beam, and the results showed a good agreement with the development of the fracture process of the concrete.