ULTIMATE STRENGTH OF RECTANGULAR PRESTRESSED CONCRETE COLUMNS UNDER CONCENTRIC AND ECCENTRIC LOADINGS

THE RESULTS OF THE FIRST PHASE OF A RESEARCH PROGRAM CONCERNED WITH PRESTRESSED CONCRETE UNDER COMBINED AXIAL COMPRESSION AND BENDING ARE PRESENTED. ELEVEN RECTANGULAR PRESTRESSED CONCRETE COLUMNS, ALL WITH HINGED SUPPORTS, WERE TESTED TO FAILURE UNDER EITHER CONCENTRIC OR ECCENTRIC LOADING. ALL COLUMNS WERE 5 5/8X5 5/8 IN., PRESTRESSED WITH FOUR 1/4 IN. STRANDS, EACH INITIALLY TENSIONED TO 6300 LB. THE COLUMNS WERE CAST WITH CONCRETE FROM THE SAME BATCH. THE VARIABLES WERE THE SLENDERNESS RATIO AND THE ECCENTRICITY RATIO. FOR EACH LOAD INCREMENT ON THE COLUMN, DEFLECTIONS AND STRAINS WERE MEASURED EXCEPT FOR THE FINAL LOAD INCREMENT JUST BEFORE FAILURE. THE TEST RESULTS ARE COMPARED WITH THE PREDICTIONS BY AN ANALYTICAL SOLUTION AND A SIMPLIFIED DESIGN METHOD. THE RESULTS COMPARE FAVORABLY WITH BOTH SOLUTIONS. A DISCUSSION OF THE TEST RESULTS IS PRESENTED ALONG WITH SUGGESTIONS FOR IMPROVEMENT OF EXPERIMENTAL TECHNIQUE IN FUTURE STUDIES. /AUTHOR/

• Supplemental Notes:
  • Hpr-pr-1/4/, BPR-67-00.2
• Corporate Authors:

  North Carolina State University, Raleigh

  Raleigh, NC  United States  27695

  North Carolina State Highway and Public Works Commission

  P.O. Box 25201, 1 South Wilmington Street
  Raleigh, NC  United States  27611
• Authors:
  • Andrew, J R
  • Zia, P
• Publication Date: 1967-9

Subject/Index Terms

• TRT Terms: Alternatives analysis; Axial compression; Bending; Columns; Deflection; Design; Eccentricity; Failure; Prestressed concrete; Rectangles; Strain measurement; Testing; Thinness; Ultimate strength
• Uncontrolled Terms: Design criteria; Slenderness ratio
• Old TRIS Terms: Test results
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 00207851
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 16 1994 12:00AM