SPIRALLY PRESTRESSED CONCRETE CYLINDERS

EXPERIMENTS WITH 17 SPIRALLY PRESTRESSED CONCRETE CYLINDERS ARE DESCRIBED. SPIRAL PRESTRESSING WIRE VOLUME WAS 0.6 TO 1.2 PERCENT OF CONCRETE VOLUME. ULTIMATE AXIAL STRESS WAS INCREASED 2.5 TIMES BUT WAS VIRTUALLY INDEPENDENT OF LATERAL PRESTRESS. AXIAL STRESS AT WHICH POISSON'S RATIO DEVIATED FROM A CONSTANT, AXIAL STRESS AT 0.05 PERCENT OFFSET AND AXIAL STRESS AT MINIMUM VOLUME WERE INCREASED BY FACTORS OF 1.5 TO 2.0 BY LATERAL PRESTRESSING. CREEP RUPTURE OCCURRED AT 12.75 KSI (896.4 KGF/CM) AXIAL STRESS BUT NOT AT 5 KSI (351.5 KGF/CM). FOUR KSI AXIAL COMPRESSION MIGHT BE A REASONABLE WORKING STRESS FOR MATERIALS AND PERCENTAGES INVESTIGATED. /AUTHOR/

• Supplemental Notes:
  • Vol 65, No 10, PP 837-845, 9 FIG, 1 TAB, 10 REF, 1 APP
• Authors:
  • Martin, C W
• Publication Date: 1968-10

Media Info

• Serial:
  • Am Concrete Inst Journal & Proceedings

Subject/Index Terms

• TRT Terms: Axial compression; Axial loads; Creep; Experiments; Poisson ratio; Prestressed concrete; Prestressing; Rock fracture; Spirals
• Uncontrolled Terms: Axial stress; Cylinders; Lateral stress
• Old TRIS Terms: Poissons ratio
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208924
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 24 1994 12:00AM