Flexural behavior of CFRP box beams and strain measurement by image analysis

Matsumoto, Takashi; Sakuraba, Hiroki

doi:10.2208/jscejam.67.i_793

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The digital image correlation method (Matsumoto et al 2011;Matsue et al 2019) was used in this study. An RGB (red-green-blue) color image of the specimen was converted to a gray-scale image and subsequently to a binary image.…”

Section: Image Analysis Methodsmentioning

confidence: 99%

“…To facilitate the investigation of the behaviors of structural members under various loading conditions, researchers (Matsumoto et al 2011;Matsue et al 2019) have established an image analysis method that we have applied in this study to understand the mechanism of damage and failure. Because the image analysis allows us to observe the strain distributions of structural members, it is useful in understanding the deformation behaviors of those structural members in a two-dimensional manner.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Image Analysis for Deformation Behaviors of RC Beams with Simulated Deteriorations under Moving Wheel Load

Nagai

Deng

Matsumoto

2022

ACT

Self Cite

View full text Add to dashboard Cite

In Japan, RC bridges slabs constructed during the high economic growth period are suffering from severe deteriorate due to fatigue. In cold and snowy regions, in addition to fatigue, the deterioration is accelerated and aggravated simultaneously by freeze-thaw cycles and water penetration simultaneously. Hence, in this study, aiming at investigating the deterioration due to this combined action, three RC beams were artificially damaged on the top surface by introducing expansion agents to simulate the freeze-thaw cycle damages beforehand, and then subjected to moving wheel load under either dry or wet condition. In the experiment, a scaling-off and a disintegration were observed on the top surface due to the existence of water. Besides, to facilitate the elucidation of the mechanisms, image analysis was employed to obtain the displacement distributions and strain distributions on the side surfaces of the specimens during the test. The results of image analysis clearly manifested that the water-induced deteriorations lead to a localized compressive strain on the upper part of the beams as well as detrimentally affected the propagation of the shear and bending cracks under the moving wheel load. In summary, the mechanical reasons of the remarkably shortened fatigue life of artificially damaged RC bridge slabs due to combined fatigue loads and water penetration were uncovered in this study taking advantage of the strengths of image analysis, which also provides reference and inspiration for further related studies.

show abstract

Section: Image Analysis Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Image Analysis for Deformation Behaviors of RC Beams with Simulated Deteriorations under Moving Wheel Load

Nagai

Deng

Matsumoto

2022

ACT

Self Cite

View full text Add to dashboard Cite

show abstract

Image Analysis on the Deformation Behaviors of RC Beams with Simulated Deteriorations Under Moving Wheel Load Fatigue

Nagai

Kakuma²,

Nishi

et al. 2022

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Video Image-Based Dynamic Behavior Analysis of Concrete Structures by Using Digital Image Correlation Method

Imai

Ohta²,

Tsuyuki

et al. 2017

Journal of JSCE

View full text Add to dashboard Cite

This paper describes an experimental study on video image-based analysis by using digital image correlation (DIC) to acquire the dynamic behaviors of concrete structures. We used video images recorded by a high-frame-rate camera in laboratory and field tests and then calculated the time series of the in-plane displacement fields of the images to measure the behaviors of concrete structures, such as changes in deflection and cracking. The results obtained from a cyclic loading test on a damaged T-shaped concrete beam successfully proved that our method provided reasonable dynamic deflection and crack-opening displacement. A concrete bridge slab was measured from the ground in a field traffic loading test. It was found that the in-plane displacement of images was affected by deflection due to live loading; thus, we estimated deflection by using video images recorded under the slab. The estimated deflection was satisfactorily found to correspond to measurements obtained from a laser displacement sensor. Moreover, we demonstrated the extraction of the displacement in maximum crack opening by subtracting the estimated deflection.

show abstract

Flexural behavior of CFRP box beams and strain measurement by image analysis

Cited by 3 publications

References 0 publications

Image Analysis for Deformation Behaviors of RC Beams with Simulated Deteriorations under Moving Wheel Load

Image Analysis for Deformation Behaviors of RC Beams with Simulated Deteriorations under Moving Wheel Load

Image Analysis on the Deformation Behaviors of RC Beams with Simulated Deteriorations Under Moving Wheel Load Fatigue

Video Image-Based Dynamic Behavior Analysis of Concrete Structures by Using Digital Image Correlation Method

Contact Info

Product

Resources

About