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Title:

GENERALIZED APPROACH TO DESIGN OF POSTTENSIONED CONCRETE ANCHORAGE ZONES

Accession Number:

00627145

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309054141

Abstract:

The current provisions for the design of posttensioned concrete anchorage zones in AASHTO's bridge design specification state only that designers should limit the average bearing pressure ahead of the anchorage device to less than 3,000 lb/sq in. or 0.9f' sub ci (f' sub ci is the initial concrete compressive strength), whichever is smaller. The specification does not give any guidance for other forces in the anchorage zone, which in many cases are critical. A research project funded by NCHRP and conducted at the University of Texas at Austin was initiated in 1984 with the primary objective of developing a rational and systematic approach to anchorage zone design that could be implemented in the AASHTO bridge specification. The project is completed, and the process of submitting provisions to AASHTO is under way. The proposed provisions provide guidelines for both ultimate and service limit states. It is proposed to divide the anchorage zone into a local zone and a general zone, to require an acceptance test for anchorage devices with high bearing stresses, and to implement design procedures for the general zone that can use a strut-and-tie model, finite element analysis, or approximate equations, or all of these. An introduction into the project and those provisions that are being proposed to AASHTO are presented.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1371, Bridge, Culvert, and Tunnel Research. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Monograph Accession #:

01405120

Language:

English

Authors:

Sanders, David H
Breen, John E

Pagination:

p. 83-91

Publication Date:

1992

Serial:

Transportation Research Record

Issue Number: 1371
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309054141

Features:

Figures (6) ; References (19) ; Tables (2)

Old TRIS Terms:

Subject Areas:

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

Files:

TRIS, TRB

Created Date:

Mar 24 1993 12:00AM

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