AUXILIARY REINFORCEMENT IN CONCRETE CONNECTIONS

A SIMPLE BUT POWERFUL METHOD FOR THE DESIGN OF CONNECTIONS IN PRECAST CONCRETE IS INTRODUCED. THE METHOD IS BASED ON A PHYSICAL MODEL OF BEHAVIOR, RATHER THAN ON CURVE-FITTING TO EMPIRICAL DATA. IT IS THUS SUITABLE FOR A WIDE VARIETY OF CONNECTION PROBLEMS, AS WELL AS FOR CONNECTION GEOMETRIES NOT COVERED BY PREVIOUS TESTS. WHEN PROPERLY USED, THIS APPROACH RESULTS IN RELIABLE, DUCTILE CONNECTIONS WHICH DO NOT SUFFER FROM THE VARIOUS TYPES OF DISTRESS ALL TOO COMMON IN PRECAST CONNECTIONS. THE CONCRETE IS ASSUMMED TO CRACK IN AN UNFAVORABLE LOCATION, IN THE REGION OF THE CONNECTION. THE SHEAR-FRICTION HYPOTHESIS IS THEN USED TO DETERMINE THE AMOUNT OF REINFORCING WHICH MUST CROSS THE ASSUMED CRACKS. SHEARING STRESSES ALONG AN ASSUMED CRACK ARE RESISTED BY FRICTION. THE NORMAL FORCE REQUIRED TO MOBILIZE FRICTION IS PROVIDED BY REINFORCING STEEL, PLACED NORMAL TO THE ASSUMED CRACK. APPLICATIONS TO COMPOSITE BEAMS, CORBELS, BEARING SHOES, TENSION SPLICES, AND CONFINEMENT ARE DISCUSSED, AND A PRACTICAL DESIGN EXAMPLE IS GIVEN. /AUTHOR/

• Supplemental Notes:
  • Vol 94, No ST 6, PROC PAPER 6002, PP 1485-1504
• Authors:
  • Mast, R F
• Publication Date: 1968-6

Media Info

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

Subject/Index Terms

• TRT Terms: Beams; Behavior; Composite materials; Concrete; Cracking; Design; Ductility; Friction; Joints; Mathematical models; Precast concrete; Reinforced concrete; Reinforcing steel; Shear stress
• Uncontrolled Terms: Composite beams; Concrete cracking; Confinement; Models
• Old TRIS Terms: Joint
• Subject Areas: Design; Highways; Materials;

Filing Info

• Accession Number: 00212637
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM