Damage characteristics and assessment of corroded RC beam-column joint under cyclic loading based on acoustic emission monitoring

Zhang, Xinchen; Li, Bing

doi:10.1016/j.engstruct.2019.110090

Cited by 27 publications

(14 citation statements)

References 22 publications

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“…During the mapping process, the first crack that appeared on the surface of the specimen was identified. Torchlight was used to detect the crack initiation especially the occurrence of hairline crack [12].…”

Section: Visual Observationmentioning

confidence: 99%

“…From these values of cumulative signal strength, the location of the channels is important to capture signal released from the crack [12,[19][20][21]. At the same time, the motion of the wave induced by the crack is also to be taken into consideration.…”

Section: Relationship Between Cumulative Signal Strength and Time For All Channelsmentioning

confidence: 99%

“…Thus, employing AE is vital to assess in regards to the structural integrity by identifying the occurrence of damages over time. Monitoring micro-cracks is often overlooked and undetectable by naked eyes where the AE can achieve the purpose [12]. Moreover, NDT approach is an alternative way to observe the damages without causing any damage to the structures.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic Emission Signal Application on Damage Evaluation of RC Beam-Column Joint under Monotonic Loading

Jalilluddin¹,

Mohamad²,

Saliah³

et al. 2021

cea

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Beam-column joint in reinforced concrete (RC) structure is a critical element that needs to be monitored continuously throughout its service life. The beam-column connection acts as the core component that receives moment transfer from adjacent elements. Consequently, the integrity of the RC beam-column joint reduces when subjected to load over time. This study investigates the damage of RC beam-column joint subjected to static load until failure using acoustic emission (AE) signal strength. The size of the RC joint sample was composed of 300mm x 200mm x 600mm, 200mm x 200mm x 1200mm and 1500mm x 500mm x 300mm for beam, column and foundation respectively. The vertical loading was applied to the beam at 530 mm distances from the column surface. Four sensors were used at specified positions at the beam and column surfaces. It was found that the increment of load intensity results in intensified acoustic emission signal strength.

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Section: Visual Observationmentioning

confidence: 99%

Section: Relationship Between Cumulative Signal Strength and Time For All Channelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Acoustic Emission Signal Application on Damage Evaluation of RC Beam-Column Joint under Monotonic Loading

Jalilluddin¹,

Mohamad²,

Saliah³

et al. 2021

cea

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show abstract

“…It was also demonstrated that different crack types and fracture mechanisms are well characterized by analysis of AF and RA parameters. Climent et al 9 investigated damage in RC exterior beam‐column subassemblage reinforced as per Spanish seismic code PDS‐74 and Zhang and Li 10 investigated damage characteristics of RC BCJs reinforced with Eurocode‐8 under cyclic loading using AE technique. Noorsuhada et al 11 investigated crack progression in RC BCJs reinforced normally without ductile consideration under static loading using AE technique.…”

Section: Introductionmentioning

confidence: 99%

Damage progression inRC beam‐columnjoints under cyclic loading using acoustic emission technique

Singh

Sharma

Kwatra

2021

Structural Concrete

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Beam-column joint (BCJ) is the most critical element of a RC structure and plays an important role in the sound seismic performance of buildings. A number of joint failures have been reported in the literature and it is important to monitor the BCJ regularly to assess their performance so that the damage is predicted much before it reaches a catastrophic level. This study aims to monitor the initiation and progression of damage in BCJ reinforced with and without ductile reinforcement detailing under cyclic loading using a real-time passive acoustic emission (AE) technique. Results have been analyzed on the basis of AE parameters such as cumulative AE hits, cumulative energy, rise angle, average frequency, and Ib-value. The Ib-value analysis has demonstrated good correlation with the experimental observations and it has been established that macroscopic fracture occurs in a RC BCJ during loading. The AE event map successfully gives pictorial representation of the crack development inside the concrete and crack pattern plotted by the AE event maps gives an idea of presence of cracks near the damage area of BCJ. It is also possible to distinguish between tensile and shear crack developing at the joint by using AE data. A linear relationship has been observed between the AE energy and energy dissipated by BCJ to evaluate damage indices in seismically damaged structures. The AE energy gives better representation of quantum of damage than AE hits.

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“…Numerous laboratory studies on crack detection based on AE have been conducted on specimens representative of in-service structures, both on steel members [ 22 , 23 , 24 ] and concrete samples [ 25 , 26 , 27 ]. In addition, field-testing applications have been carried out on large-scale structures, such as bridges, nuclear power plants, containment structures like silos, bins, and water storage tanks [ 28 ], and prestressed concrete pipes exposed to corrosion phenomena [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Structural Health Monitoring Based on Acoustic Emissions: Validation on a Prestressed Concrete Bridge Tested to Failure

Tonelli

Luchetta

Rossi

et al. 2020

Sensors

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The increasing number of bridges approaching their design life has prompted researchers and operators to develop innovative structural health monitoring (SHM) techniques. An acoustic emissions (AE) method is a passive SHM approach based on the detection of elastic waves in structural components generated by damages, such as the initiation and propagation of cracks in concrete and the failure of steel wires. In this paper, we discuss the effectiveness of AE techniques by analyzing records acquired during a load test on a full-size prestressed concrete bridge span. The bridge is a 1968 structure currently decommissioned but perfectly representative, by type, age, and deterioration state of similar bridges in operation on the Italian highway network. It underwent a sequence of loading and unloading cycles with a progressively increasing load up to failure. We analyzed the AE signals recorded during the load test and examined how far their features (number of hits, amplitude, signal strength, and peak frequency) allow us to detect, quantify, and classify damages. We conclude that AE can be successfully used in permanent monitoring to provide information on the cracking state and the maximum load withstood. They can also be used as a non-destructive technique to recognize whether a structural member is cracked. Finally, we noticed that AE allow classifying different types of damage, although further experiments are needed to establish and validate a robust classification procedure.

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Damage characteristics and assessment of corroded RC beam-column joint under cyclic loading based on acoustic emission monitoring

Cited by 27 publications

References 22 publications

Acoustic Emission Signal Application on Damage Evaluation of RC Beam-Column Joint under Monotonic Loading

Acoustic Emission Signal Application on Damage Evaluation of RC Beam-Column Joint under Monotonic Loading

Damage progression inRC beam‐columnjoints under cyclic loading using acoustic emission technique

Structural Health Monitoring Based on Acoustic Emissions: Validation on a Prestressed Concrete Bridge Tested to Failure

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