Advanced NDT methods for evaluating concrete bridges and other structures

Sack, Dennis A.; Olson, Larry D.

doi:10.1016/0963-8695(95)00045-3

Cited by 36 publications

(20 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as indicated above, an exact theory is difficult, if not impossible, to develop: because of the small number of subdomains due to which convenient limiting behaviors are not established, because of our ignorance of the correct distribution for the t i (Eqs. (4) and (5)), and because of the restriction of a one-dimensional sequential modeling approach itself. Yet, it is seen that the Fré chet distribution allows a fairly good fit which can serve many engineering purposes well.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…4 For each of these cubes, we measured three UPV values (using the three pairs of parallel faces), giving 90 data points in all. The cubes and instrument are shown in Fig.…”

Section: Gpt M55 Cubesmentioning

confidence: 99%

“…For a broad discussion of such issues as well as the use of UPV measurements in nondestructive testing (NDT) of concrete, see Refs. [3][4][5][6].…”

Section: Introductionmentioning

confidence: 98%

“…The penalty was for guiding the search, and inactive at (footnote continued) the optima. Finally, 9m9, 9a9 and 9s9 were used in place of m, a and s to eliminate negative values 4. As a courtesy from the Panagarh Sleeper Division, which makes railway sleepers.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Use of the Fréchet distribution for UPV measurements in concrete

Chatterjee

2012

NDT & E International

View full text Add to dashboard Cite

Section: Theoretical Modelmentioning

confidence: 99%

“…4 For each of these cubes, we measured three UPV values (using the three pairs of parallel faces), giving 90 data points in all. The cubes and instrument are shown in Fig.…”

Section: Gpt M55 Cubesmentioning

confidence: 99%

“…For a broad discussion of such issues as well as the use of UPV measurements in nondestructive testing (NDT) of concrete, see Refs. [3][4][5][6].…”

Section: Introductionmentioning

confidence: 98%

mentioning

confidence: 99%

See 2 more Smart Citations

Use of the Fréchet distribution for UPV measurements in concrete

Chatterjee

2012

NDT & E International

View full text Add to dashboard Cite

“…In this field, there has been a gradual development of several design philosophies, including Safe-Life, Fail-Safe, and the modern Damage Tolerance [2]- [7]. None of the three methods assumes infinite life for the component or structure, so the prediction of its operational life and structural integrity represents a fundamental aspect.…”

Section: Introductionmentioning

confidence: 99%

An ultra-wideband radar approach to nondestructive testing

Gubinelli

Giorgetti

Mazzotti

et al. 2014

2014 IEEE International Conference on Ultra-WideBand (ICUWB)

View full text Add to dashboard Cite

In this paper a new method for nondestructive testing (NDT), applied to carbon fiber composite materials, is investigated. The approach is based on the comparison between the electromagnetic signal reflected by the carbon fiber composite sheet under test, when an ultra-wideband (UWB) signal is incident on it, and the one reflected by a healthy sheet. The possible presence of a defect is then revealed by an appropriate metric measuring the mismatch between the two reflected waveforms. The performance of different metrics is investigated, for two defect types, based on real measurements in an indoor environment. As an outcome of our experimental activity, very promising results have been obtained for one of the tested metrics, which allows to accurately detect surface defects with a size comparable to the radar resolution on a carbon fiber composite sheet.

show abstract

Infrared thermography detection of delamination in bottom of concrete bridge decks

Raja

Miramini

Duffield

et al. 2021

Structural Contr & Hlth

View full text Add to dashboard Cite

Infrared thermography (IRT) has been widely used in detecting the subsurface delamination of bridge deck. However, IRT inspection on delamination zones of the bridge deck which have limited exposure to direct solar radiation (e.g., the bottom surface of the bridge deck) is rather challenging due to the relatively low thermal contrast (ΔT) development in these zones. Therefore, the purpose of this study is to conduct a series of experimental studies in conjunction with numerical modeling for investigating the effectiveness of IRT in delamination detection of bridge deck components which are normally not exposed to direct solar radiation. Specially, the effects of different environmental conditions, thickness of bridge deck, and defect characteristics on the absolute thermal contrast (ΔT) development were systematically investigated. The results show that IRT can effectively detect the subsurface delamination of concrete bridge deck located in regions that are not exposed to the direct solar radiation. In addition, the development of detectable thermal contrast (>0.5 C) is much dependent on the rate of change in ambient temperature with a suitable detection period between 8 am and 4 pm. Furthermore, it shows that the value of ΔT increases with the increase of bridge deck thickness and delamination size.

show abstract

Advanced NDT methods for evaluating concrete bridges and other structures

Cited by 36 publications

References 1 publication

Use of the Fréchet distribution for UPV measurements in concrete

Use of the Fréchet distribution for UPV measurements in concrete

An ultra-wideband radar approach to nondestructive testing

Infrared thermography detection of delamination in bottom of concrete bridge decks

Contact Info

Product

Resources

About