Crack classification in concrete beams using AE parameters

Bahari, Nur Amira Afiza Saiful; Shahidan, Shahiron; Abdullah, Siti Radziah; Ali, Noorwirdawati; Zuki, Sharifah Salwa Mohd; Ibrahim, Mohammed; Rahim, Mustaqqim Abdul

doi:10.1088/1757-899x/271/1/012090

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…Fiber balling weakens by the high possibility of fiber surfaces coming in contact with one another. The area between fiber surfaces is the weakest point in concrete; microcracks and macrocracks caused by compression loading easily appear in this area [26][27][28].…”

Section: Resultsmentioning

confidence: 99%

Concrete Incorporated with Optimum Percentages of Recycled Polyethylene Terephthalate (PET) Bottle Fiber

Shahidan¹

2018

IJIE

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Section: Resultsmentioning

confidence: 99%

Concrete Incorporated with Optimum Percentages of Recycled Polyethylene Terephthalate (PET) Bottle Fiber

Shahidan¹

2018

IJIE

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“…Several AE parameters like AE hits, AE energy, cumulative signal strength, rise angle, average frequency, and so on can be used to characterize the damage and AE indices like Calm Ratio, Relaxation Ratio, and so on can be used to quantify the damage. Various researchers have applied AE techniques to classify the crack, [9][10][11] to detect the degree of damage, 7,12,13 to correlate the average frequency and rise angle of AE events with cracking pattern and its types, 14 to quantify the damage level using Felicity Ratio and Calm Ratio 12 and variation of other AE indices like Calm Ratio and Relaxation Ratio with damage. 15 Commonly used methods to quantify damage levels using AE techniques in concrete structures are intensity analysis (IA), b-value analysis, and improved b-value analysis.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of damage in GFRP repaired steel fiber reinforced concrete beams using acoustic emission technique

Goyal

Sharma

Kwatra

2021

Structural Concrete

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In the present study, monitoring of damage initiation and progression in steel fiber reinforced beams (SFRBs) subjected to half cyclic loading under flexure is attempted using acoustic emission (AE) technique. Variation in AE parameters of cumulative AE hits and acoustic energy with damage progression in these beams along with their flexural performance is studied and compared. Further SFRB beams failed to 90% damage level are repaired using GFRP wraps and are subjected to flexural loading and simultaneous AE monitoring. Variation in AE parameters along with load deflection behavior for control SFRB and retrofitted SFRB beams have been discussed and compared. Based on AE and load-deflection data, Damage Index values were calculated and Damage States have been proposed which can help in providing an early warning of failure proximity. Subsequently empirical relationships have been developed between Damage Index and AE parameters using genetic programming (GP) technique and are in excellent coherence with experimental results. It can be concluded from the study that AE analysis is an effective tool for damage monitoring in SFRB and GFRP repaired SFRB beams.

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