Details:

Alternative Title:
Improved Inspection Techniques for Steel Prestressing/Post Tensioning Strand : Volume I
Creators:
Azizinamini, Atorod ; Gull, Jawad
Azizinamini, Atorod ; Gull, Jawad Less -
Corporate Creators:
Florida International University
Corporate Contributors:
Florida. Department of Transportation
Subject/TRT Terms:
[+]
Bridges Florida Inspection Nondestructive Evaluation Nondestructive Tests Post-tensioning Posttensioning Prestressing Pretensioning Tensioning
Resource Type:
Tech Report
Geographical Coverage:
Florida
Edition:
Draft final; Mar. 2011-Jun. 2012.
Corporate Publisher:
Florida International University
Abstract:
Post-tensioned bridges require a detailed inspection of their post-tensioning systems since damage in these

systems is not evident and can result in costly repairs/replacements, loss of integrity and reduction in safety

of the bridge. Different nondestructive evaluation (NDE) techniques can be used for the inspection of post-

tensioning systems however; there is no systematic way by which a particular NDE technology may be

selected for a particular job.

This project presents elements and foundation for development of a systematic, job specific approach for the

selection of NDE technology for inspection of the post-tensioning systems.

In order to achieve this goal, factors affecting the performance of NDE techniques used for the condition

assessment of the post-tensioning systems are identified. NDE techniques are then grouped according to

their underlying phenomenological bases to put forth the working principles, and pros and cons that can be

used for the development of ranking system.

It has been found that major difference in grouting practice before and after 2000 affects the selection of

NDE technique for the inspection of post-tensioning systems. Other factors affecting the performance of the

NDE techniques are the duct system, geometrically difficult zones, and the types of defects. Separate sets of

NDE technique are recommended for the internal/external ducts positioned along the traffic and

geometrically difficult zones. A job specific “Ranking Index” is proposed for the selection of NDE that

takes into account the not only the above mentioned factors but also the cost of conducting NDE. Based on

the project findings a roadmap to develop comprehensive methodology to effectively assess the condition of

post-tensioned bridge systems is presented.


Format:
PDF
Funding:
BDK80 977-13
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:27bd8aa4db707e2d1a1aa7c560099f41d3a626d71cd92632ad097079dfe83711
Download URL:
https://rosap.ntl.bts.gov/view/dot/25056/dot_25056_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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