AN APPARATUS FOR MEASURING THE DYNAMIC STIFFNESS OF ROADS AND SOILS

THE ARTICLE DESCRIBES A SMALL AND PORTABLE APPARATUS DESIGNED TO MEASURE THE DYNAMIC STIFFNESS OF ROADS AND SOILS UNDER SINUSOIDAL LOADING, AT FREQUENCIES BETWEEN 5 AND 1000 HZ. AN ELECTROMAGNETIC VIBRATOR APPLIES FORCES OF UP TO APPROXIMATELY 14 LB /ABOUT ITS DEAD WEIGHT OF 45 LB/ TO THE ROAD SURFACE, THE FORCE ITSELF AND THE RESULTING DISPLACEMENT OF THE ROAD SURFACE BEING MEASURED BY MEANS OF ELECTRICAL TRANSDUCERS FEEDING A PHASE-SENSITIVE VOLTMETER. VALUES OF THE ELASTIC STIFFNESS OF THE CONSTRUCTION AND VALUES OF THE DAMPING ARE OBTAINED. CHECK TESTS OF THE BEHAVIOR OF THE APPARATUS ARE DESCRIBED, AND SOME TYPICAL RESULTS ON VARIOUS TYPES OF ROAD PAVEMENT ARE GIVEN. /AUTHOR/

  • Supplemental Notes:
    • Vol 44,no 7,PP 537-540
  • Authors:
    • Thrower, E N
  • Publication Date: 1967-7

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  • Accession Number: 00206669
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 15 1994 12:00AM