FORCED VIBRATION OF CONTINUOUS HIGHWAY BRIDGES

A CORRELATION IS PRESENTED OF FORCED VIBRATION THEORY WITH DYNAMIC IMPACT TESTS FOR THREE CONTINUOUS HIGHWAY BRIDGES AND A SIMPLE SPAN HIGHWAY BRIDGE. THE EXPERIMENTAL IMPACT WAS DETERMINED AT THE CENTERLINE OF THE SINGLE SPAN HIGHWAY BRIDGE AND IN THE OUTER AND INNER SPANS AND AT THE INTERIOR SUPPORTS FOR THE THREE TYPES OF CONTINUOUS FOUR-SPAN HIGHWAY BRIDGES. THE EFFECT OF THE VEHICLE IS ASSUMED TO BE AN OSCILLATING FORCING FUNCTION WHOSE FREQUENCY IS THE FREQUENCY OF AXLE REPETITION AND WHOSE FORCE IS THE OSCILLATING LOAD EFFECT OF A CONSTANT FORCE TRAVERSING A BEAM. THE CORRELATION OF THE THEORETICAL AND EXPERIMENTAL IMPACT INDICATES THAT THE SIMPLIFICATIONS MADE IN THE EFFECT OF THE VEHICLES ARE JUSTIFIED FOR THE BRIDGES TESTED AND THE EXPERIMENTAL VEHICLE VELOCITIES USED. THESE RESULTS SHOW QUALITATIVELY THAT THE AMOUNT OF IMPACT IS A FUNCTION OF THE RATIO OF THE FREQUENCY OF AXLE REPETITION TO THE LOADED NATURAL FREQUENCY OF THE STRUCTURE. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/339/339-001.pdf
• Supplemental Notes:
  • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Linger, D A
  • Hulsbos, C L
• Conference:
  • 41st Annual Meeting of the Highway Research Board
  • Location: Washington DC, United States
  • Date: 1962-1-8 to 1962-1-12
• Publication Date: 1962

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 1-22
• Monograph Title: Bridge deck design and loading studies
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 339
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Accelerated tests; Axle load force; Continuous girder bridges; Crash tests; Dynamic tests; Highway bridges; Natural frequency; Oscillation; Repeated loads; Theory; Vehicles; Velocity; Vibration
• Old TRIS Terms: Simple span
• Subject Areas: Bridges and other structures; Highways; Research; Vehicles and Equipment;

Filing Info

• Accession Number: 00208495
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Aug 5 1994 12:00AM