DAMPING IN FRICTION-GRIP BOLTED JOINTS

The object of the work reported in this paper is to obatin a measure and an understanding of the damping in high-strength friction-grip bolted joints. Static tests to determine the coefficient of friction and cyclic tests to determine the amount of damping in symmetrical double-coverplated butt joints are described. Four plate surfaces were examined, i.e., galvanized, inorganic zinc silicate, urethame chromate primer, and mill scale. An energy loss relationship was found for each surface type. At the working load levels, the damping factors ranged from 5% to 12%, and the energy losses, after early variations, tended to stable values with increasing numbers of cycles. Suggestions on improvements to increase joint damping are given. /Author/

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Vitelleschi, S
  • Schmidt, L C
• Publication Date: 1977-7

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1447-60
• Serial:
  • Journal of the Structural Division
  • Volume: 103
  • Issue Number: ST7
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Boiling point; Butt joints; Coefficient of friction; Damping (Physics); Dissipation; Repeated loads; Static tests; Structural plates
• Uncontrolled Terms: Plates
• Subject Areas: Bridges and other structures; Energy; Highways;

Filing Info

• Accession Number: 00165355
• Record Type: Publication
• Report/Paper Numbers: ASCE 13086 Proceeding
• Files: TRIS
• Created Date: Mar 7 1978 12:00AM