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Title:

SERVICEABILITY CRITERIA FOR PRESTRESSED CONCRETE BRIDGE GIRDERS

Accession Number:

00711723

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309061091

Abstract:

Serviceability limit states often govern in the design of prestressed concrete bridge girders, yet the corresponding acceptability criteria are not clearly justified. The paper deals with allowable stresses and ultimate moment. The requirements of the AASHTO standard specifications are demonstrated on pretensioned bridge girders AASHTO Types III through VI. Moments are calculated for the considered limit states and for various spans. It is observed that the ratio of these moments varies with regard to span length. In most cases, the final tension stress (after the final loss of prestress) determines the minimum required number of prestressing strands. On the other hand, the important limit state is compression stress in concrete, as overloading may lead to unacceptable permanent deformations. Revision of the serviceability limit states, consistent in format with the new AASHTO load and resistance factor design specifications, is suggested. The formulation of a compression limit state in concrete that is based on the elastic limit and tension limit states in concrete and the modulus of rupture is proposed.

Supplemental Notes:

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 #:

00711666

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Nowak, A S
El-Hor, H H

Pagination:

p. 181-187

Publication Date:

1995

Serial:

Transportation Research Board Conference Proceedings

Issue Number: 7
Publisher: Transportation Research Board
ISSN: 1073-1652

Conference:

Fourth International Bridge Engineering Conference

Location: San Francisco, California
Date: 1995-8-28 to 1995-8-30
Sponsors: Transportation Research Board; Federal Highway Administration; Federal Railroad Administration; American Association of State Highway and Transportation Officials; and California Department of Transportation.

ISBN:

0309061091

Features:

Figures (4) ; References (6) ; Tables (1)

Old TRIS Terms:

Subject Areas:

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

Files:

TRIS, TRB

Created Date:

Sep 6 1995 12:00AM