REINFORCED CONCRETE BEAMS UNDER REPEATED LOADS

RESULTS OF AN EXPERIMENTAL PROGRAM ARE DESCRIBED OF THE EFFECT OF REPEATED LOADS ON THE ROTATION AND LOAD CARRYING CAPACITY OF REINFORCED CONCRETE BEAMS. COMPARING RESULTS OBTAINED UNDER REPEATED LOADING WITH RESULTS OBTAINED ON SIMILAR SPECIMENS UNDER SINGLE LOADING SHOWED THAT NEITHER THE ROTATION NOR THE LOAD CARRYING CAPACITY IN A REINFORCED CONCRETE BEAM IS AFFECTED BY SEVERAL CYCLES OF NEAR ULTIMATE LOADING. REPEATED LOADING ALWAYS CAUSED A RELATIVELY SMALL INCREASE IN DEFORMATION THAT APPEARS TO BE RELATED TO DESTRUCTION OF BOND AND TO ADDITIONAL CRACKING AT THE LEVEL OF THE REINFORCEMENT, OR TO BOTH. THE ROTATION CAPACITY OF A PLASTIC HINGE WAS FOUND TO BE GREATLY AFFECTED BY VARIATIONS IN THE CONCRETE STRENGTH, BY VARIATIONS IN THE POSITION OF OF THE COMPRESSION STEEL, AND BY VARIATIONS IN THE RESTRAINT PROVIDED BY THE STIRRUP TO THE COMPRESSION BAR. /ASCE/

• Supplemental Notes:
  • Vol 95, No ST 6, PROC PAPER 6601, PP 1189-1211, 13 FIG,
• Authors:
  • Ruiz, W M
  • Winter, G
• Publication Date: 1969-6

Media Info

• Serial:
  • Journal of the Structural Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Accelerated tests; Beams; Bearing capacity; Breaking loads; Compression; Concrete; Deformation; Hinges; Reinforced concrete; Reinforcing steel; Repeated loads; Rotation; Stirrups
• Uncontrolled Terms: Concrete beams
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209045
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 29 1994 12:00AM