CLOSING REMARKS AT SYMPOSIUM ON BRIDGES: LOADING HISTORY, ULTIMATE STRENGTHS, AND PERFORMANCE

THE ONE RECURRING THEME FROM ALL OF THE PAPERS PRESENTED AT THE SYMPOSIUM WAS THAT MEASURED STRESSES WERE SMALL AND WELL BELOW THE LIVE-LOAD DESIGN STRESSES, AND THAT THEREFORE, THERE IS NO NEED TO BE CONCERNED ABOUT FATIGUE PROBLEMS IN HIGHWAY BRIDGES. BUT WHILE THERE HAVE BEEN FEW REPORTED CASES OF TRAFFIC-INDUCED FATIGUE PROBLEMS, THE RECENT DISCOVERY OF SEVERAL CRACKED BEAMS ON A RELATIVELY YOUNG BRIDGE (12 YEARS OF SERVICE) ON THE CONNECTICUT TURNPIKE HAS RAISED THE QUESTION OF HOW RELEVANT SUCH BRIDGE-LOADING HISTORY TESTS ARE TO THE VERY HIGH-VOLUME, HEAVY-TRUCK ARTERIES IN THE CONGESTED URBAN AREAS OF THE COUNTRY. IT IS URGED, THEREFORE, THAT EXTENSIVE LOADING HISTORY TESTS BE MADE ON THE BRIDGES IN THESE HIGH-TRAFFIC URBAN AREAS AND THAT THE OWNERS OF THE BRIDGES MAKE ESPECIALLY CLOSE INSPECTIONS OF THOSE DETAILS LIKELY TO SUFFER FATIGUE DAMAGE. SINCE THERE MAY WELL BE MORE FATIGUE DAMAGE THAN HAS BEEN HERETOFORE RECOGNIZED, IT IS URGED THAT THERE BE ESTABLISHED A MORE OPEN LINE OF COMMUNICATION BETWEEN BRIDGE MAINTENANCE ENGINEERS AND THE BRIDGE DESIGN AND RESEARCH COMMUNITY.

Media Info

  • Media Type: Print
  • Pagination: p 64
  • Monograph Title: Loading history of bridges
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00209708
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 7 1972 12:00AM