SEISMIC RESISTANCE OF CONCRETE FRAMES WITH GRADE 60 REINFORCEMENT

FIVE FULL SIZE BEAM-COLUMN JOINT SPECIMENS WERE SUBJECTED TO REVERSALS OF BEAM LOADING TO REPRESENT TWO EARTHQUAKE EFFECTS. GRADE 60 REINFORCEMENT WAS USED FOR EDGE, INTERIOR, CORNER AND ISOLATED JOINTS. CONCLUSIONS WERE BASED ON COMPARISONS WITH EARLIER TESTS OF JOINTS WITH GRADE 40 REINFORCEMENT. INCREASE IN RESISTING MOMENT DUE TO STRAIN HARDENING WAS AN AVERAGE OF 22.6% FOR THE SPECIMENS WITH GRADE 60 STEEL COMPARED TO 10% FOR EARLIER TEST SPECIMENS WITH GRADE 40 STEEL. EXCESSIVE INCREASES IN RESISTING MOMENT AFTER YIELDING MAY BE DETRIMENTAL TO SEISMIC DESIGNS. SHEAR REINFORCEMENT AND ANCHORAGE DETAILS FOLLOWING THE SAME PATTERNS PREVIOUSLY FOUND SATISFACTORY FOR GRADE 40 REINFORCEMENT WERE FOUND TO BE ADEQUATE FOR THE GRADE 60 REINFORCEMENT. /ASCE/

• Supplemental Notes:
  • Vol 97, NosT6, PROC PAPER 8180, PP 1685-1699, 11 REF, 2 APP
• Authors:
  • Hanson, N W
• Publication Date: 1971-6

Media Info

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

Subject/Index Terms

• TRT Terms: Beams; Columns; Concrete; Earthquakes; Frames; Joints; Material reinforcement; Resisting moments; Seismology; Shear strength; Structural analysis; Testing
• Old TRIS Terms: Joint; Resistance
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209489
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 1 1971 12:00AM