HIGHWAY-BRIDGE IMPACT PROBLEMS

A REVIEW IS PRESENTED AND EXPERIMENTAL RESEARCH AT THE UNIVERSITY OF ILLINOIS ON THE HIGHWAY BRIDGE IMPACT PROBLEM. EXAMPLES OF ANALYTICAL RESULTS OBTAINED ON A HIGH SPEED DIGITAL COMPUTER ARE PRESENTED FOR A SERIES OF PROBLEMS OF INCREASING PRACTICAL IMPORTANCE INCLUDING: (1) A SINGLE RIGID MASS MOVING AT CONSTANT VELOCITY OVER A FLEXIBLE BEAM, (2) A SINGLE SPRUNG MASS MOVING AT CONSTANT VELOCITY OVER A FLEXIBLE BEAM, STARTING WITH ZERO INITIAL DEFLECTION AND ZERO INITIAL BOUNCING VELOCITY, AND (3) A SPRUNG MASS OSCILLATING WITH SOME DEFINITE AMPLITUDE OF OSCILLATION, MOVING AT CONSTANT VELOCITY OVER A FLEXIBLE BEAM, ARRANGED IN PHASE OF THE BOUNCING MOTION SO THAT THE MASS PRODUCES APPROXIMATELY THE WORST POSSIBLE CONDITION IN THE BEAM. CONSIDERATION IS GIVEN TO OTHER FACTORS AND A BRIEF DISCUSSION IS MADE OF THEIR IMPORTANCE. COMPARISONS ARE MADE OF THE RESULTS OF THE ANALYSES WITH OTHER THEORETICAL RESULTS AND WITH RESULTS OF CAREFULLY MADE EXPERIMENTS OF THE EFFECT OF ROLLING SPRUNG AND UNSPRUNG MASSES ON A SMALL ELASTIC BEAM. THE RESULTS OF THE COMPARISONS INDICATE THAT THE DATA OBTAINED FROM THE ANALYSIS ARE DEPENDABLE AND ACCURATE. THE GENERAL PROBLEM OF IMPACT ON HIGHWAY BRIDGES IS DISCUSSED WITH A VIEW TOWARD DESIGN APPLICATIONS OF THE RESULTS OF THE RESEARCH PROGRAM, AND THE PLANNING OF FUTURE STUDIES IN THE PROGRAM. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/124/124-006.pdf
• Supplemental Notes:
  • No 124, pp 111-134, 16 FIG, 1 TAB, 6 REF 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:
  • Tung, T P
  • Goodman, L E
  • Chen, T Y
  • Newmark, N M
• Publication Date: 1956

Media Info

• Media Type: Digital/other
• Pagination: 24p
• Monograph Title: Vibration and stresses in girder bridges
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 124
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Beams; Bridge design; Bridges; Digital computers; Elastic analysis; Flexibility; Highway bridges; Impacts; Structural design
• Old TRIS Terms: Elastic analysis (Structural)
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208836
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Dec 9 1994 12:00AM