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- W1509461660 abstract "AN EXPERIMENTAL STUDY OF THE EFFECTS OF DYNAMIC LOADING ON ON THE VERTICAL COMPRESSIVE DEFLECTIONS OF ELASTOMERIC BEARINGS AND THE INFLUENCE OF THE FLEXIBLE BEARINGS ON THE RESPONSE OF THE SUPPORTED SPAN IS DESCRIBED. THE PRIMARY TEST STRUCTURE WAS A STEEL-BEAM, COMPOSITE-SPAN, HIGHWAY BRIDGE DYNAMICALLY LOADED BY A TEST VEHICLE CLOSELY SIMULATING AN AASHO HS20-44 STANDARD TRUCK. THE BEARINGS INVESTIGATED INCLUDED 1 SET OF CONVENTIONAL STEEL ROCKER PLATE ASSEMBLIES AND 5 SETS OF ELASTOMERIC PADS REPRESENTING A WIDE RANGE OF PRACTICAL DESIGN PARAMETERS. ALTHOUGH THE ACCEPTED COMPRESSION-DEFLECTION RELATIONSHIP FOR ELASTOMERIC PADS WAS VERIFIED EXPERIMENTALLY FOR BOTH STATIC AND DYNAMIC LOADING, IT WAS CONCLUDED THAT DEFLECTIONS OF FULL-SIZED BEARINGS UNDER EITHER TYPE OF LOADING WOULD BE LESS THAN THOSE PREDICTED BY THE STANDARD DESIGN CURVES. ANALYTICAL AND MODEL STUDIES INDICATED THAT ELASTOMERIC BEARINGS WOULD REDUCE BOTH THE FREQUENCY OF VIBRATION OF THE SUPPORTED SPAN AND THE FLEXURAL STRESS IN THE STRUCTURAL MEMBERS AT RESONANCE. THE EFFECT OF THE BEARINGS IN REDUCING THE FREQUENCY OF VIBRATION OF THE SPAN, HOWEVER, WAS FOUND TO BE SLIGHT; AND UNDER THE REALISTIC LOADING CONDITION UTILIZED, NO PRACTICAL ADVANTAGE WAS INDICATED IN REDUCED FLEXURAL STRESSES OR INCREASED DAMPING OF VIBRATIONS. HOWEVER, A TREND TOWARD INCREASED DEFLECTIONS OF THE SPAN ON ELASTOMERIC BEARINGS WAS NOTED AT ALL SPEEDS OF THE TEST VEHICLE. /AUTHOR/" @default.
- W1509461660 created "2016-06-24" @default.
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- W1509461660 date "1971-01-01" @default.
- W1509461660 modified "2023-09-23" @default.
- W1509461660 title "DYNAMIC STRESS STUDY OF COMPOSITE-SPAN BRIDGE WITH CONVENTIONAL AND ELASTOMERIC BEARINGS" @default.
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