BEHAVIOR OF BOLTED JOINTS WITH OVERSIZE OR SLOTTED HOLES

TWENTY-ONE BOLTED JOINTS WERE TESTED TO DETERMINE THE EFFECT OF OVERSIZED OR SLOTTED HOLES ON THE SLIP BEHAVIOR AND ULTIMATE STRENGTH OF BOLTED JOINTS. HOLE SIZES STUDIED HAD STANDARD 1/4 IN., AND 5/16 IN. CLEARANCES. SLOTS PARALLEL AND TRANSVERSE TO THE LINE OF LOAD WERE STUDIED, ALL JOINTS WERE FABRICATED FROM A36 STEEL PLATE AND FASTENED BY 1 IN. A325 BOLTS. ALSO STUDIED WAS THE NEED FOR WASHERS FOR OVERSIZE HOLES AND CHANGES IN BOLT TENSION. FOR HOLES WITH 1/4 IN. CLEARANCE THERE WAS NO DECREASE IN THE SLIP COEFFICIENT, EXCESSIVE LOSS IN BOLT TENSION, OR INADEQUATE PRELOAD. THE STUDIES INDICATED THAT A WASHER IS DESIRABLE UNDER THE TURNED ELEMENT TO PREVENT SEVERE GALLING. A DECREASE IN THE SLIP COEFFICIENT WAS OBSERVED FOR THE JOINTS WITH 5/16 IN. HOLE CLEARANCE AND FOR THOSE WITH SLOTTED HOLES. SLOTTED HOLES PERPENDICULAR TO THE LINE OF LOAD DID NOT DECREASE THE ULTIMATE STRENGTH OF THE JOINTS. /AUTHOR/

• Supplemental Notes:
  • Hpr-1/4/, 318.3, 9779
• Corporate Authors:

  Lehigh University

  Bethlehem, PA  United States  18015

  Pennsylvania Department of Highways

  400 North Street
  Harrisburg, PA  United States  17120-0095
• Authors:
  • Allan, R N
  • Fisher, J W
• Publication Date: 1967-8

Subject/Index Terms

• TRT Terms: Bolted joints; Bolts; Holes; Joints; Size; Steel plates; Structural analysis; Structural mechanics; Tension; Ultimate strength
• Uncontrolled Terms: Structural behavior
• Old TRIS Terms: Hole size; Washers
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215861
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 8 1994 12:00AM