DYNAMIC RESPONSE OF BRIDGE SUPERSTRUCTURES--ONTARIO OBSERVATIONS

During the past twenty years a number of investigations of the dynamic response of highway bridges to the action of heavy vehicle loading have been completed in the Province of Ontario. A summary of the results of these investigations is presented in terms of dynamic deflection, speed and longitudinal flexural frequency for a given superstructure. The dynamic response of a superstructure is found to be a complex function of riding surface roughness, the bounce and pitch frequencies of typical commercial vehicles, vehicle speed and the longitudinal flexural frequency of the superstructure. For a superstructure frequency range between 2 and 5 Hz a quasi-resonance phenomenon appears to exist between vehicles and superstructure. The results are not presented in a design format. A reliability-based second moment format is suggested for dynamic load allowances whereby the dynamic interaction between vehicles and superstructures can be described for design purposes. /Author/

• Supplemental Notes:
  • Proceeding of a Symposium of Dynomic Behavior of Bridges at the Transport and Road Research Laboratory, Crowthorne, Berkshire, England, May 19, 1977.
• Corporate Authors:

  Transport and Road Research Laboratory (TRRL)

  Wokingham, Berkshire  United Kingdom 
• Authors:
  • Green, R
• Conference:
  • Proceeding of a Symposium of Dynomic Behavior of Bridges at the Transport and Road Research Laboratory, Crowthorne, Berkshire, England, May 19, 1977.
• Publication Date: 1977-5-19

Media Info

• Features: Figures; References;
• Pagination: p. 40-55

Subject/Index Terms

• TRT Terms: Bridge design; Bridge superstructures; Bridges; Coarse grained materials; Dynamic loads; Flexure; Frequency (Electromagnetism); Loads; Motor vehicles; Pitch (Dynamics); Speed; Structural design; Texture; Traffic speed
• Uncontrolled Terms: Dynamic response; Loading; Longitudinal
• Old TRIS Terms: Coarse materials; Dynamic deflection determination; Heater--remix method
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00172169
• Record Type: Publication
• Report/Paper Numbers: TRRL Rpt. 275 Proceeding
• Files: TRIS
• Created Date: Apr 12 1978 12:00AM