ANALYSIS, INSPECTION, AND REPAIR METHODS FOR PIN CONNECTIONS ON ILLINOIS BRIDGES. FINAL REPORT

This report documents methods used in Illinois for analysis, inspection, and repair of pin connections in bridges. Weldable foil strain gages were used to detect the effects of unknown levels of fixity in pins on cantilever truss bridges. Other methods for detecting pin movement, including electronic angle sensors and scratch-type pointer gages were also investigated. The maximum effect of complete fixity on pins and hangers was estimated with finite element models of both cantilever truss and cantilever girder bridges. A pin inspection procedure using ultrasonic instrumentation was developed and tested throughout the state. Design deficiencies of pin connections are noted. Modernized details which eliminate many of the existing deficiencies are presented. The improvements include better tolerances on fits and finishes, increased degrees of freedom of rotation, provisions for periodic lubrication, high strength, corrosion resistant alloys, extreme pressure lubricants, and toughness requirements based on alloy yield strength. A method for calculating factor of safety for pins based on distortion energy principles is presented.

  • Record URL:
  • Corporate Authors:

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  United States  62704-4766

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • South, J M
    • Hahin, C
    • Telford, R O
  • Publication Date: 1992-4

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 100 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00624981
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/IL/PR-107, PRR-107
  • Files: NTL, TRIS, USDOT, STATEDOT
  • Created Date: Sep 22 1993 12:00AM