Digital Image Analysis of Cracksonthe Concrete Surface Based on the Gabor Wavelet Transformation

Koyama, Satoru; Maruya, Tsuyoshi; Horiguchi, Kenichi; Sawa, Takeo

doi:10.2208/jscejmcs.68.178

Cited by 16 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This information is usually available as the first choice of real bridge management data by hand sketch and/or photographs, and most easily obtained at site. Furthermore, the crack information is effectively digitalized with which we may run some numerical methods more easily (Koyama et al 2012).…”

Section: Test Results and Crack Patterns At Bottom Surfacementioning

confidence: 99%

“…If there is no crack data on the lateral face, the authors recommend to assume 0.1% gel volume as an input, or to conduct non-destructive testing such as an acoustic wave velocity, percussion sound and ultrasonic wave detection in the thickness direction. (3) Finally, the visual or camera based inspection data of cracking on the bottom face of the slab (Koyama et al 2012) is converted to the smeared strain field. This converted digital data is addressed to the pseudo-cracking procedure , and finally, the remaining lifetime is obtained as shown in Fig.…”

Section: Scheme Of Data Assimilation For Asr Damaged Decksmentioning

confidence: 99%

See 1 more Smart Citation

Computational Life Assessment of ASR-damaged RC Decks by Site-Inspection Data Assimilation

Takahashi

Tanaka

Maekawa

2018

ACT

View full text Add to dashboard Cite

To estimate the remaining life of existing RC bridge decks damaged by alkali silica reaction (ASR), multi-scale numerical analysis with chemo-hygral model is integrated with visual inspection data at site. First, the applicability of the poro-mechanical models for ASR expansion in the multi-scale frame are examined with the experiments of the real scale RC slabs and the model is validated to bring about fair prediction of the 3D anisotropic expansion and the fatigue life of the slabs. Second, visually inspected cracks on bottom surfaces of RC decks are converted to space-averaged strains, and the magnitude of ASR is estimated from the vertical deformation, based on which the internal pre-stress and the damage fields are re-produced by numerical predictor-corrector cycles, and the remaining life of ASR damaged RC bridge decks is fairly estimated. By conducting sensitivity analyses in terms of ASR-gel volumes and cracks, allowable error range of site inspection data is clarified to meet the requirement of asset management.

show abstract

Section: Test Results and Crack Patterns At Bottom Surfacementioning

confidence: 99%

Section: Scheme Of Data Assimilation For Asr Damaged Decksmentioning

confidence: 99%

Computational Life Assessment of ASR-damaged RC Decks by Site-Inspection Data Assimilation

Takahashi

Tanaka

Maekawa

2018

ACT

View full text Add to dashboard Cite

show abstract

Section: Test Results and Visual Inspection Datamentioning

confidence: 99%

Remaining Fatigue Life Assessment of Damaged RC Decks -Data Assimilation of Multi-scale Model and Site Inspection-

Tanaka

Takahashi

Maekawa

2017

ACT

View full text Add to dashboard Cite

For estimating remaining fatigue life of RC bridge decks subjected to traveling wheel-type loads, presented is the data assimilation procedure, i.e., coupled life-span simulation with inspection data at site. Multi-scale analysis with hygro-mechanistic models is used for the platform of data assimilation on which the visual inspection of cracking on the members' surfaces and the acoustic emission (AE) tomography are numerically integrated. For verification, the wheel running load experiments of slabs were conducted with continuous data acquisition of both crack patterns and the acoustic emission data over the life till failure. Visually inspected cracks are converted to space-averaged strains, based on which the internal strains and damage fields are re-produced by numerical predictor-corrector cycles. The 3D field of elastic wave identified by AE tomography is also converted to the fracture parameter of concrete. Although no information on cracking is available, the proposed assimilation method successfully reproduces most probable internal cracks over the volume of analysis domains, and the remaining life of the deck slabs inspected was successfully estimated.

show abstract

Nearshore bathymetry estimation using UAV

Matsuba

Sato

2018

Coastal Engineering Journal

View full text Add to dashboard Cite

Digital Image Analysis of Cracksonthe Concrete Surface Based on the Gabor Wavelet Transformation

Cited by 16 publications

References 2 publications

Computational Life Assessment of ASR-damaged RC Decks by Site-Inspection Data Assimilation

Computational Life Assessment of ASR-damaged RC Decks by Site-Inspection Data Assimilation

Remaining Fatigue Life Assessment of Damaged RC Decks -Data Assimilation of Multi-scale Model and Site Inspection-

Nearshore bathymetry estimation using UAV

Contact Info

Product

Resources

About