01658055

Component

The main objective of this paper is to further explore infrared thermography (IRT) with advanced data analysis methods to overcome some of the limitations of IRT. A case study from a bridge in Jacksonville, FL is presented along with successful detection results as well as uncertainties for the bridge deck, underside, piers, and pier caps. In this study, IRT was utilized on this bridge for a number of locations, with hammer sounding validation to discuss the feasibility of IRT for certain scenarios such as discoloration, shading, reflection. For example, the uncertainties associated with IRT application, such as the effect of reflections from surrounding objects and solar radiation are presented and discussed. These areas were also cross-checked by visual examination of the physical site or the visual image of the surface. The delaminated areas of the bridge deck, underside of the deck and the pier were successfully detected by IRT and validated by hammer sounding. Next, this study presents an advanced IRT data analysis method using finite element modeling to estimate the approximate depth and severity of the delamination detected by IRT, which has been a shortcoming of IRT in the past.

This paper was sponsored by TRB committee AFF40 Standing Committee on Testing and Evaluation of Transportation Structures.

18-02253

English

13p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; Maps; Photos; References; Tables

Bridges; Case studies; Data analysis; Delamination; Feasibility analysis; Finite element method; Infrared imagery; Inspection; Thermographs; Validation

Jacksonville (Florida)

Bridges and other structures; Highways; Maintenance and Preservation

Transportation Research Board Annual Meeting 2018 Paper #18-02253

TRIS, TRB, ATRI

Jan 8 2018 10:33AM