FIELD TESTING OF TWO PRESTRESSED CONCRETE GIRDERS
A FIELD STUDY IS DESCRIBED OF THE BEHAVIOR OF A PRESTRESSED CONCRETE OVERPASS. A COMPANION TEST PROGRAM WAS CONDUCTED TO DETERMINE THE PHYSICAL CHARACTERISTICS OF THE MATERIALS USED IN ACTUAL CONSTRUCTION. RESULTS INDICATED THAT: (1) THE OVERALL BEHAVIOR OF THE STRUCTURE WAS FOUND TO BE IN REASONABLE AGREEMENT WITH THE DESIGN ASSUMPTIONS USED IN THE GENERAL ELASTIC THEORY, (2) THE ACTUAL EFFECTIVE TENDON FORCE WAS APPROXIMATELY 10% HIGHER THAN THE DESIGN VALUE DUE TO THE EFFECT OF TENDON WOBBLE AND FRICTION, (3) THE ASSUMPTION THAT THE TENDON LOSSES MAY BE APPROXIMATED AS 15% OF THE INITIAL PRESTRESS FORCE WAS CONFIRMED BY A COMPARISON OF THE MEASURED DEFLECTION WITH THE CALCULATED VALUES BASED ON THE ACTUAL PROPERTIES OF THE MATERIALS USED IN THE STRUCTURE, AND (4) THE TECHNIQUE OF PROVIDING TEMPORARY SHORES FOR THE GIRDERS DURING THE PLACING AND CURING OF THE CAST-IN-SITU SLAB WAS FOUND TO BE EFFECTIVE IN DEVELOPING COMPOSITE ACTION BEFORE THE TRANSFER OF THE SLAB DEAD LOAD AND IN EQUALIZING MINOR DIFFERENCES IN THE CAMBER OF THE PRECAST GIRDERS.
- Record URL:
-
Supplemental Notes:
- No 307, pp 42-63, 14 FIG, 1 TAB, 4 REF 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.
-
Authors:
- Pauw, Adrian
- Breen, John E
-
Conference:
- 40th Annual Meeting of the Highway Research Board
- Location: Washington DC, United States
- Date: 1961-1-9 to 1961-1-13
- Publication Date: 1962
Media Info
- Media Type: Digital/other
- Monograph Title: Prestressed concrete structures; creep, shrinkage, deflection studies
-
Serial:
- Highway Research Board Bulletin
- Issue Number: 307
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Coasts; Curvature; Elasticity (Mechanics); Force; Girder bridges; Losses; Prestressed concrete; Tendons
- Old TRIS Terms: Elastic theory
- Subject Areas: Bridges and other structures; Highways; Materials;
Filing Info
- Accession Number: 00213199
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 16 1994 12:00AM