FINAL REPORT OF THE INVESTIGATION OF IMPACT ON HIGHWAY BRIDGES

THE INVESTIGATION WAS CONCERNED WITH THE STUDY OF THE EFFECTS OF THE VARIOUS FACTORS THAT INFLUENCE THE DYNAMIC RESPONSE OF HIGHWAY BRIDGES. THE OBJECTIVE WAS TO OBTAIN INFORMATION WHICH MAY SERVE AS A GUIDE IN THE SELECTION OF APPROPRIATE IMPACT FACTORS FOR HIGHWAY BRIDGE DESIGN, AS A GUIDE FOR FUTURE WORK IN BRIDGE DYNAMICS WITH PARTICULAR APPLICATIONS TO THE PLANNING AND INTERPRETATION OF FIELD STUDIES OF BRIDGE BEHAVIOR AND AS AN AID IN PREDICTING THE LIFE EXPECTANCY OF BRIDGES. ANALYSES AND PARAMETRIC STUDIES WERE MADE ON SIMPLE-SPAN, THREE-SPAN CONTINUOUS AND CANTILEVER BRIDGE TYPES, LOADED BY THREE-AXLE SPRING VEHICLES. THE STUDIES WERE PRIMARILY ANALYTICAL, SUPPLEMENTED BY SMALL-SCALE LABORATORY TESTS. WHILE NO CHANGE HAS BEEN PROPOSED FOR THE IMPACT SPECIFICATION COMMONLY USED FOR HIGHWAY BRIDGES, THE INVESTIGATION HAS CONTRIBUTED TO AN UNDERSTANDING OF THE RATIONALE WHICH SHOULD BE USED IN DEVELOPING AN IMPACT SPECIFICATION. HOWEVER, A CHANGE IN THE IMPACT SPECIFICATION IS NOT WARRANTED UNTIL A RE-EXAMINATION HAS BEEN MADE OF LOADING CONDITIONS, DESIGN LOADS, METHODS OF COMPUTATION OF THE STATIC LOAD DISTRIBUTION OF BRIDGES AND THE GENERAL PHILOSOPHY OF SETTING FATIGUE AND DEFLECTION CRITERIA. /AUTHOR/

• Supplemental Notes:
  • Hrr, Ihr 9
• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Urbana, IL  United States  61801

  Illinois Department of Transportation

  Division of Highways, 2300 South Dirksen Parkway
  Springfield, IL  United States  62764

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Walker, W H
• Publication Date: 1969-6

Subject/Index Terms

• TRT Terms: Bridge design; Bridge superstructures; Bridges; Cantilevers; Continuous girder bridges; Design load; Dynamic loads; Field studies; Highway bridges; Life span; Load tests; Load transfer; Static loads; Structural design
• Uncontrolled Terms: Bridge spans; Dynamic response; Impact factor
• Old TRIS Terms: Simple span
• Subject Areas: Bridges and other structures; Highways; Society;

Filing Info

• Accession Number: 00207929
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 5 1970 12:00AM