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Radiographic Inspection of Gusset-Plate Connections

Project Information

Project ID: 
FHWA-PROJ-11-0039
Project Status: 
Completed
Start Date: 
Monday, May 9, 2011
End Date: 
Thursday, November 1, 2012
FHWA Program: 
Infrastructure
FHWA Subprogram: 
Structures, Asset Management
FHWA Topics: 
Roads and Bridges--Asset Management; Roads and Bridges--Structures; Research/Technologies--Turner-Fairbank Highway Research Center (TFHRC)
TRT Terms: 
Radiography; Gusset Plates; Corrosion; Inspection; Infrastructure; Bridge Trusses; Steel Bridges
FHWA Discipline: 
Structures
TRB Subject Area: 
Bridges and other structures, Research, Maintenance and Preservation

Contact Information

First Name: 
Justin
Last Name: 
Ocel
Telephone: 
(202) 493-3080
Email Address: 
Team: 
Bridge Engineering Team
Office:
Office of Infrastructure Research and Development
Office Code: 
HRDI-40

Project Details

Project Description: 

The project needs to evaluate existing radiographic inspection technologies and post-processing for inspection of gusset-plated truss connections. The project would have to evaluate and recommend techniques needed to produce effective images through multiple gusset plates, and then demonstrate the ability to determine where different density changes (i.e., corrosion loss) exist. This would include recommendations for radiation intensity, required number of images, required standoff distances, etc.  Finally, the technique should be deployable without the need to shut down traffic for radiation concerns if at all possible. This project will run in parallel with the National Cooperative Highway Research Program project (NCHRP 12-84) research and use two of those research specimens on which to test the technique.

Goals

To determine the efficacy of using radiographic testing (RT) for the inspection of multilayered gusset-plated connections to find corrosion hidden from typical visual inspections.

Deliverables

Deliverable Name: 
Final Report
Deliverable Type: 
Techbrief
Deliverable Description: 
This report will be written by the contracted agency and will include a description of their radiographic testing inspection method, results attained, and interpretations of the data collected.