DYNAMIC TESTS ON A ROLLED-BEAM COMPOSITE SIMPLE SPAN BRIDGE
THE REPORT DESCRIBES FIELD STUDIES CONDUCTED COOPERATIVELY BY THE STATE AND THE /THEN/ PHYSICAL RESEARCH DIVISION OF THE BUREAU OF PUBLIC ROADS. THE PRIMARY OBJECTIVE WAS TO MEASURE ACTUAL DYNAMIC AMPLIFICATION OF STRAIN AND DEFLECTION IN A TYPICAL SIMPLE SPAN COMPOSITE I-BEAM STRUCTURE AND TO COMPARE THE EXPERIMENTAL RESULTS WITH COMPUTED THEORETICAL AND DESIGN VALUES. STRAIN AND DEFLECTION GAGES WERE LOCATED AT CRITICAL POINTS ON THE BRIDGE. ACCURATELY WEIGHED AND MEASURED TEST VEHICLES WERE THEN DRIVEN ACROSS THE BRIDGE OVER A WIDE RANGE OF CONTROLLED SPEEDS AND LATERAL LANE POSITIONS WHILE DYNAMIC RESPONSES WERE BEING RECORDED. OF SIGNIFICANCE WERE THE HIGH AMPLIFICATIONS OF STRAIN AND DEFLECTION OBSERVED WHEN THE TEST VEHICLES PASSED THROUGH A DEPRESSION CREATED IN THE ROADWAY APPROACH TO THE SIMPLE SPAN THEREBY MEASURING THE ADVERSE EFFECT OF POOR MAINTENANCE ON SIMPLE SPAN APPROACHES. COMPARATIVELY HIGH STRAIN VALUES NOTED IN GENERAL ON THIS STRUCTURE MARK THE FINDINGS AS ESPECIALLY SIGNIFICANT FOR USE IN FUTURE STUDIES CORRELATING THE DYNAMIC RESPONSE OF SIMILAR STRUCTURES. THE FACT THAT TWO TEST VEHICLES OF WIDELY DIVERGENT CHARACTERISTICS WERE USED ON THIS STUDY ADDS MORE DEPTH TO THE STUDY. COMPARISONS OF THEORETICAL AND EXPERIMENTAL VALUES UNDER TWO MODES OF LOADING ARE MADE AND THE GOOD COMPARISONS IN EACH CASE LEND ADDED VALIDITY TO THE FINDINGS . /AUTHOR/
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Supplemental Notes:
- Hpr, Sep63
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Corporate Authors:
South Dakota Department of Transportation
700 East Broadway Avenue
Pierre, SD United States 57501 -
Authors:
- Varney, R F
- Publication Date: 1963-9
Subject/Index Terms
- TRT Terms: Alternatives analysis; Beams; Bridge decks; Composite materials; Deflection; Deflection tests; Design; Dynamic tests; Dynamics; Field studies; I beams; Loads; Strain (Mechanics); Strain gages; Testing; Theory; Vehicles
- Uncontrolled Terms: Dynamic characteristics; Loading
- Old TRIS Terms: Rolled beam; Simple span; Strains
- Subject Areas: Bridges and other structures; Design; Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 00207751
- Record Type: Publication
- Source Agency: Bureau of Public Roads /US
- Files: TRIS, STATEDOT
- Created Date: Oct 1 1994 12:00AM