Predicting the ultimate bending capacity of concrete beams from the “relaxation ratio” analysis of AE signals

Colombo, Silvia; Forde, M. C.; Main, Ian; Shigeishi, Mitsuhiro

doi:10.1016/j.conbuildmat.2005.06.004

Cited by 87 publications

(37 citation statements)

References 1 publication

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“…More recently other indexes have been proposed. Relaxation ratio analysis was introduced by Colombo et al [9,10]. Relaxation ratio is defined as the ratio of the average AE energy during unloading phase to the average AE energy during loading phase.…”

Section: Intensity Analysismentioning

confidence: 99%

Evaluation of deterioration in reinforced concrete structures by AE technique

Proverbio

2010

Materials & Corrosion

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Acoustic emission (AE) technique is gaining increasing interest for applications in civil engineering. AE indeed is a passive nonintrusive technique that can be applicable either in structural health monitoring (global evaluation) and in defect localization (local evaluation). The most promising application of such a technique seems to be however in the evaluation of growing defects. Defects such as cracks and delamination can be caused by reinforcement corrosion as well as by other concrete deterioration mechanisms (alkali silica reaction, sulphate attack, etc.) as well as originating from improper concrete casting, curing or structure setting. Damage severity can be evaluated by means of the intensity analysis (IA) through the use of different indexes such as ‘Load Ratio’, ‘Calm Ratio’, ‘Felicity Ratio’ or ‘Historical Index’. Damage evolution analysis along time could be however significantly improved by adopting some procedure already used in the field of geophysics and earth science. Among various parameters, the most significant one is the b‐value which is derived from the amplitude distribution data of AE following the methods used in seismology. Several application examples applied to prestressed concrete structures are reported in the paper.

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Section: Intensity Analysismentioning

confidence: 99%

Evaluation of deterioration in reinforced concrete structures by AE technique

Proverbio

2010

Materials & Corrosion

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“…This method is directly related to assessment of fiber reinforced polymeric vessels. "Relaxation ratio" has likewise been used to quantify the residual strength of reinforced concrete beams (Colombo et al, 2005).…”

Section: Reinforced Concretementioning

confidence: 99%

Acoustic Emission for Civil Structures

Ziehl¹,

Pollock²

2012

Acoustic Emission

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“…∫ (2) Where V i is the voltage transient of an i th channel, t 0 is the starting time of the voltage transient record and t1 is the ending time of the voltage transient record. Using the AE energy, Relaxation Ratio was proposed by (Colombo et al, 2005).…”

Section: Source Locationmentioning

confidence: 99%

Damage Source Identification of Welded Steel Beam Specimen Using Acoustic Emission

Panjsetooni¹,

Bunnori²,

Shirkhani³

et al. 2013

IJSRK

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Abstract. Acoustic emission (AE) method is a passive non-destructive technique is being used as the prime candidate in structural health and damage monitoring in civil structure for investigation process of damage in both case local and global monitoring. This technique was employed for investigation process of damage in steel beam specimens. Several-welded steel beam specimens were built and tested under loading cycle and were simultaneously monitored using AE. According the stages of failure of welded steel beams, The AE test data were analyzed by AE source location method. The results showed that source location of damage in steel structures could be identified using AE technique.

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Predicting the ultimate bending capacity of concrete beams from the “relaxation ratio” analysis of AE signals

Cited by 87 publications

References 1 publication

Evaluation of deterioration in reinforced concrete structures by AE technique

Evaluation of deterioration in reinforced concrete structures by AE technique

Acoustic Emission for Civil Structures

Damage Source Identification of Welded Steel Beam Specimen Using Acoustic Emission

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