00128546

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http://onlinepubs.trb.org...s/trr/1975/547/547-004.pdf

https://scholar.google.co...uang&publication_year=1975

A rational method for estimating prestress losses in pretensioned concrete members is presented. The method is based on linking experimentally developed stress-strain-time relationships of steel and concrete materials. It enables a direct determination of stress and strain distributions in a member at any time within the service life of the member and avoids the need for step-by-step methods. Wide ranges of variation for concrete material characteristics and other design factors are permitted. The new method is illustrated by a practical design problem. Comparisons with 2 recently proposed procedures show good agreement of results.

Publication of this paper sponsored by Committee on Concrete Bridges. 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.

01411407

pp 37-46

1975

Transportation Research Record

54th Annual Meeting of the Transportation Research Board

0309024548

Print

Figures (2) ; References (9) ; Tables (2)

Deflection; Deformation curve; Estimating; Methodology; Prestressed concrete; Prestressing; Service life; Time

Prestress loss

Bridges and other structures; Design; Highways

TRIS, TRB

May 14 1976 12:00AM

• BRIDGE PIER STAINING
• CURVED I-GIRDER DESIGN
• DESIGN OF BENT CAPS FOR CONCRETE BOX GIRDER BRIDGES (ABRIDGMENT)
• FIELD TESTS OF A STEEL-COMPOSITE BOX GIRDER BRIDGE
• IRIS - AN INFORMATION RETRIEVAL SYSTEM FOR BRIDGE INVENTORY MAINTENANCE
• LABORATORY EVALUATION OF FULL-SIZE, ELASTOMERIC, BRIDGE BEARING PADS (ABRIDGMENT)
• THERMAL STRESSES IN CONCRETE BRIDGE SUPERSTRUCTURES UNDER SUMMER CONDITIONS