Visualization of Shear Cracks in a Reinforced Concrete Beam using the Digital Image Correlation

Tambusay, Asdam; Suryanto, Benny; Suprobo, Priyo

doi:10.18517/ijaseit.8.2.4847

Cited by 22 publications

(15 citation statements)

References 16 publications

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“…During testing, loading was briefly stopped to visually assess cracking on the North side of the beam. In addition to this manual crack mapping, more detailed crack mappings were undertaken using the low-cost system recently proposed by the authors [18,19]. The system employed comprised an ordinary 18.4MP Nikon 1 J4 digital camera and a smartphone for image collection, and an open-source DIC software Ncorr [20], which was used to process the images collected during testing.…”

Section: Instrumentation and Crack Mappingmentioning

confidence: 99%

Monitoring the Shear Fatigue Response of Reinforced Concrete Beams Subjected to Moving Loads using Digital Image Correlation

Suryanto

Staniforth

2019

ced

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A series of three reinforced concrete beams without shear reinforcement were tested to failure under a centre-span monotonic load, a centre-span pulsating load, and a stepwise-moving pulsating load. During each experiment, load-deflection response was continuously monitored and at several stages during the experiment, the load was briefly stopped for crack observations. In addition to this manual crack mapping, more detailed crack mappings were undertaken using the digital image correlation (DIC) technique, employing the open-source DIC software Ncorr. It was shown that while the three beams exhibited a similar mode of failure (i.e. shear), each beam displayed a rather distinctive overall behaviour, particularly with regard to the load-deflection response and the nature of crack initiation and propagation. Results from the DIC analysis are presented to provide direct evidence on the damage progression during the load cycles and discuss the reduced fatigue life exhibited by the beam subjected to stepwise-moving pulsating load

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Section: Instrumentation and Crack Mappingmentioning

confidence: 99%

Monitoring the Shear Fatigue Response of Reinforced Concrete Beams Subjected to Moving Loads using Digital Image Correlation

Suryanto

Staniforth

2019

ced

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“…The high-resolution digital camera Nikon D7200 completed the DIC system (24.72 million pixels). Images were postprocessed using the open source twodimension software package Ncorr, [19][20][21] which works in MATLAB environment. The ROI was 300 mm high and with a variable length depending on the distance between supports, as shown in Figure 3a.…”

Section: Test Setupmentioning

confidence: 99%

Experimental tests on shear capacity of naturally corroded prestressed beams

Belletti

Rodrı́guez

Andrade

et al. 2020

Structural Concrete

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An experimental campaign was carried out on full-scale naturally corroded prestressed concrete (PC) beams without transverse reinforcement to investigate the corrosion effects on failure modes, shear capacity, and ductility. The analyzed PC beams, structural members of a thermal power plant, were subjected for 10 years to refrigerating wetting cycles with marine water. In this paper, the experimental results of four-point bending tests, carried out at the Institute "Eduardo Torroja" in Madrid, are described. Before tests, a visual inspection was conducted to detect the damages induced by corrosion. During the tests, displacements and strains were measured by using linear variable displacement transducer (LVDT) and digital image correlation (DIC). After the tests, strands were removed from beams and cut in pieces, which were weighed to measure the mass loss. Last, it was proved that the residual life of PC beams, exposed to chloride attack, is strongly affected by corrosion, whose effects reduce the shear capacity in terms of both resistance and ductility. K E Y W O R D S digital image correlation, natural corrosion, prestressed concrete beams, shear capacity 1 | INTRODUCTION In the last years, corrosion has been considered as one of the main factors that causes detrimental effects on durability and resistance of reinforced concrete (RC) and prestressed concrete (PC) structures and infrastructures. After the recent bridge collapses occurred worldwide, such as the Ynys-y-gwas Bridge in 1985 in

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“…The acquired images were processed using an opensource DIC software Ncorr [16,17,20]. To this end, the longitudinal strain profiles obtained from the DIC analysis were used to assess the extent of damage during the load cycles.…”

Section: Automated Crack Mappingmentioning

confidence: 99%

“…This paper presents an experimental study investigating the mechanism of shear fatigue in reinforced concrete beams subjected to a stationary pulsating and a moving load, and how they compare to an identical beam subjected to a monotonic load from which the design code equations are generally based upon. More specifically, this study employs the low-cost automated crack mapping system, which utilises the digital image correlation (DIC) [16,17], to provide evidence of crack formation and damage evolution during testing. In this paper, attention is directed to the sequence of crack formation and crack propagation obtained from the DIC technique, the load-deflection responses under loading and the progress of beam deflection during the loading cycles.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Mechanism of Shear Fatigue in Reinforced Concrete Beams subjected to Pulsating and Moving Loads using Digital Image Correlation

et al. 2019

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An experimental investigation on three shear-critical reinforced concrete beams was performed to investigate the mechanism of shear fatigue. The first beam was simply tested to failure under monotonic loading to determine the static capacity, whereas the other two were subjected to repetitive loading below its static capacity to failure. Of these two beams, one was subjected to a stationary pulsating load at midspan while the other was subjected to a step-wise moving load along the span. During each experiment, the crack pattern was monitored throughout using an automated crack mapping employing the digital image correlation technique. The results show that each beam exhibited a unique crack pattern which could be characterised as shear-flexure in nature. It is shown the nature of crack propagation under monotonic loading is dissimilar to that under repetitive loading, especially when the load is not stationary. Moving load is also shown to cause greater damage to the beam than the stationary pulsating load and result in a reduction in fatigue life by almost two orders of magnitude.

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Visualization of Shear Cracks in a Reinforced Concrete Beam using the Digital Image Correlation

Cited by 22 publications

References 16 publications

Monitoring the Shear Fatigue Response of Reinforced Concrete Beams Subjected to Moving Loads using Digital Image Correlation

Monitoring the Shear Fatigue Response of Reinforced Concrete Beams Subjected to Moving Loads using Digital Image Correlation

Experimental tests on shear capacity of naturally corroded prestressed beams

Investigating the Mechanism of Shear Fatigue in Reinforced Concrete Beams subjected to Pulsating and Moving Loads using Digital Image Correlation

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