EFFECT OF SURFACE COATINGS AND EXPOSURE ON SLIP BEHAVIOR OF BOLTED JOINTS

EIGHTEEN JOINTS OF A36 STEEL WITH 1 IN. DIAMETER A325 HIGH STRENGTH BOLTS WERE TESTED TO INVESTIGATE SOME EFFECTS OF SURFACE TREATMENT ON SLIP BEHAVIOR. ALL JOINTS WERE INITIALLY BLAST CLEANED. THREE HAD SLOTTED HOLES. THREE WERE EXPOSED FOR 2,6, AND 12 MONTHS WITHOUT PROTECTION BEFORE ASSEMBLY AND TESTING. NINE WERE TREATED WITH LINSEED OIL OR VINYL WASH COATINGS AND EXPOSED TO AN INDUSTRIAL ENVIRONMENT FOR 2 MONTHS BEFORE TESTING. THREE WERE TREATED WITH VINYL WASH COATINGS BUT WERE NOT EXPOSED TO THE OUTSIDE ENVIRONMENT. SLOTTED HOLES REDUCED THE SLIP COEFFICIENT FROM 0.65. TO 0.49. EXPOSURE WITHOUT PROTECTION REDUCED THE SLIP COEFFICIENT FROM 0.65 TO ABOUT 0.4. THE SLIP COEFFICIENT WITH PROTECTIVE COATINGS WAS REDUCED FROM ABOUT 0.28 TO 0.26 AFTER 2 MONTHS EXPOSURE. THIS REDUCTION IS NOT SIGNIFICANT. /AUTHOR/

• Supplemental Notes:
  • Hpr-1(4), NO 318.5, BPR-035
• Corporate Authors:

  Lehigh University

  Bethlehem, PA  United States  18015

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • LEE, J H
  • O, CONNER C
  • Fisher, J W
• Publication Date: 1968-6

Subject/Index Terms

• TRT Terms: Blast cleaning; Bolted joints; Bolts; Crash exposure; Holes; Joints; Linseed oil; Protective coatings; Surface treating; Vinyl resins
• Uncontrolled Terms: Exposure; Slippage; Slotted holes
• Old TRIS Terms: High strength bolts
• Subject Areas: Geotechnology; Highways; Maintenance and Preservation; Materials; Safety and Human Factors;

Filing Info

• Accession Number: 00215885
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Dec 6 1994 12:00AM