INSTRUMENT SYSTEM FOR MEASURING PAVEMENT DEFLECTIONS PRODUCED BY MOVING TRAFFIC LOADS

THIS PAPER DESCRIBES A FEASIBILITY STUDY THAT HAS LED TO THE DEVELOPMENT OF A FIRST-GENERATION INSTRUMENT SYSTEM OF MEASURING TRANSIENT PAVEMENT DEFLECTIONS. ACCELEROMETERS EMBEDDED IN THE PAVEMENT STRUCTURE ARE USED TO SENSE THE BASIC MOTION. DUAL ANALOG INTEGRATION IS USED TO OBTAIN AND RECORD OUTPUT INDICATIONS PROPORTIONAL TO DISPLACEMENT. THE CIRCUIT CHARACTERISTICS ARE SUCH THAT DYNAMIC VERTICAL MOVEMENTS AS SMALL AS 0.002 IN. OR HORIZONTAL MOVEMENTS AS SMALL AS 0.0005 IN. OCCURING WITHIN LESS THAN 2 SECONDS CAN BE RECORDED. THESE CHARACTERISTICS ALLOW THE SYSTEM TO BE USED FOR VEHICLE SPEEDS OF MORE THAN 25 MPH AND FOR ANY NORMAL PAVEMENT STRUCTURE. THESE PERFORMANCE CHARACTERISTICS COULD BE ALTERED, IF DESIRED, TO ACCOMMODATE THE LARGER, LONGER MOVEMENTS THAT OCCUR ON BRIDGE DECKS.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1973/471/471-010.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309022568
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Pavement Condition Evaluation. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Swift, Gilbert
• Conference:
  • 52nd Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1973-1-22 to 1973-1-26
• Publication Date: 1973

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 99-109
• Monograph Title: Evaluation of pavement surface properties and vehicle interaction
• Serial:
  • Highway Research Record
  • Issue Number: 471
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Accelerometers; Deflection; Feasibility analysis; Live loads; Measuring instruments; Pavements; Velocity
• Old TRIS Terms: Pavement deflection
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00207644
• Record Type: Publication
• ISBN: 0309022568
• Files: TRIS, TRB
• Created Date: Apr 27 1974 12:00AM