Design Guidelines for Transfer, Development and Debonding of Large Diameter Seven Wire Strands in Pretensioned Concrete Girders

Russell, Bruce W.; Burns, Ned H.

i

Design Guidelines for Transfer, Development and Debonding of Large Diameter Seven Wire Strands in Pretensioned Concrete Girders

1993-01-01
By Russell, Bruce W. ; Burns, Ned H.

File Language:

English

Details

Creators:

Russell, Bruce W. ; Burns, Ned H.
Corporate Creators:

University of Texas at Austin. Center for Transportation Research
Corporate Contributors:

Texas Department of Transportation. Division of Transportation Planning ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA/TX-93+ 121 0-5F
Resource Type:

Tech Report
Geographical Coverage:

Texas ; United States
Edition:

Final Report
Corporate Publisher:

University of Texas at Austin. Center for Transportation Research
Abstract:

Recently, a new and larger seven-wire strand was offered by industry for use in pretensioned concrete. The new strand size, 0.6 inches in diameter, has 40 percent greater area and 40 percent greater capacity than the current industry standard, 0.5-inch-diameter strand. Larger strand sizes can lead to improved efficiency of pretensioned structures; however, larger strands require greater bond forces to anchor the strands. In October of 1988, the FHWA issued a moratorium suspending the use of 0.6-inch strand in pretensioned applications. Recent studies had indicated that current design provisions were inadequate. Additional restrictions were placed on smaller sizes of strands. The limitations were adopted on an interim basis until additional research could substantiate or restructure current industry standards. One objective of this investigation is to determine the transfer and development length of 0.5-inchand 0.6-inch-diameter prestressing strands.
Format:

PDF
Funding:

3-5-89/2-1210
Download URL:

https://rosap.ntl.bts.gov/view/dot/86121/dot_86121_DS1.pdf
File Type:

[PDF - 9.44 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:af98718c255d9b376430dbfddad9b3be1d93787e95d3cb6d2415a07b2a7ab8e46935c43cc7af9b8bc14e636821ff2cd1b31fe1ca98f9034b0bef66a0327998c2

File Language:

English

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