TIME-DEPENDENT DEFORMATION OF NONCOMPOSITE AND COMPOSITE PRESTRESSED CONCRETE STRUCTURES

THIS PAPER REPORTS THE RESULTS OF AN INVESTIGATION OF THE USE OF SAND-LIGHTWEIGHT CONCRETE IN PRESTRESSED LABORATORY BEAMS AND BRIDGE GIRDERS. THE STUDY IS DIVIDED INTO 3 PARTS: A MATERIALS STUDY OF THE CONCRETE BEHAVIOR ITSELF, A LABORATORY STUDY OF THE BEHAVIOR OF BOTH NONCOMPOSITE (5 BEAMS) AND COMPOSITE (4 BEAMS) PRESTRESSED BEAMS, AND THE FIELD MEASUREMENT OF CAMBER OF PRESTRESSED GIRDERS (5) GIRDERS) USED IN THE FABRICATION OF A COMPOSITE BRIDGE IN IOWA. IN ADDITION, SYSTEMATIC DESIGN PROCEDURES ARE PRESENTED AND VERIFIED BY THE EXPERIMENTAL RESULTS. THE METHODS DESCRIBED FOR PREDICTING MATERIAL BEHAVIOR AND STRUCTURAL RESPONSE ARE GENERALIZED TO APPLY TO PRESTRESSED CONCRETE STRUCTURES OF DIFFERENT WEIGHT CONCRETES. CONTINUOUS TIME FUNCTIONS ARE PROVIDED FOR ALL NEEDED PARAMETERS SO THAT THE GENERAL SOLUTIONS READILY LEND THEMSELVES TO COMPUTER SOLUTIONS. APPROXIMATE EQUATIONS ARE ALSO INCLUDED. DESIGN PROCEDURES ARE PRESENTED FOR CALCULATION OF STRENGTH AND ELASTIC PROPERTIES, AND CREEP AND SHRINKAGE OF THE SAND-LIGHTWEIGHT CONCRETE OF THIS PROJECT AT ANY TIME, INCLUDING ULTIMATE VALUES. AN INDICATION IS GIVEN OF THE CALCULATION OF THESE PROPERTIES FOR NORMAL-WEIGHT, SAND-LIGHTWEIGHT, AND ALL-LIGHTWEIGHT CONCRETE IN GENERAL. DESIGN PROCEDURES ARE ALSO GIVEN FOR CALCULATION OF LOSS OF PRESTRESS AND CAMBER AT ANY TIME, INCLUDING ULTIMATE VALUES, OF NONCOMPOSITE AND COMPOSITE PRESTRESSED STRUCTURES. RESULTS COMPUTED BY THESE METHODS ARE SHOWN TO BE IN AGREEMENT WITH THE CONTROL SPECIMEN DATA, THE LABORATORY BEAM DATA, AND THE BRIDGE GIRDER DATA. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1970/324/324-002.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Mechanical Properties of Concrete. 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:
  • Branson, D E
  • Meyers, B L
  • Kripanarayanan, K M
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 15-43
• Monograph Title: Symposium on concrete deformation
• Serial:
  • Highway Research Record
  • Issue Number: 324
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Beams; Bridges; Composite materials; Concrete; Creep; Curvature; Deformation; Design; Elasticity (Mechanics); Equations; Girders; Laboratory tests; Lightweight concrete; Loads; Prestressed concrete; Prestressing; Sand; Shrinkage; Strength of materials; Time dependence
• Uncontrolled Terms: Composite beams; Concrete beams
• Old TRIS Terms: Prestressed beams
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 00213842
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 3 1971 12:00AM