LOADING HISTORY OF HIGHWAY BRIDGES
A DATA ACQUISITION SYSTEM ASSEMBLED FOR THE PURPOSE OF MONITORING AND DIGITIZING STRAINS PRODUCED BY ORDINARY TRUCK TRAFFIC IN HIGHWAY BRIDGES IS DESCRIBED. THE SYSTEM CONSISTS OF WHEATSTONE BRIDGE COMPLETION MODULES, AMPLIFIERS, AN ANALOG-TO-DIGITAL CONVERTER, A DIGITAL PROCESSING UNIT, AND A TELETYPE MACHINE. A COMPUTER PROGRAM TO BE USED WITH THE DATA ACQUISITION SYSTEM IS PRESENTED. THE SYSTEM WAS USED IN A PILOT STUDY ON AN INTERSTATE HIGHWAY BRIDGE NEAR DUMFRIES, VIRGINIA. STRAINS WERE MONITORED DURING SEVERAL SAMPLING PERIODS, AND TRUCKS WERE WEIGHED AND CLASSIFIED AT A NEARBY WEIGHING STATION. THE PERFORMANCE OF THE SYSTEM WAS SATISFACTORY. GENERALLY LOW STRAINS WERE MEASURED, BEING FOR THE MOST PART LESS THAN HALF OF THE CALCULATED LIVE-LOAD DESIGN VALUES. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Field Testing of Bridges and presented at the 48th Annual Meeting. 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.
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Authors:
- Galambos, C F
- Armstrong, W L
- Publication Date: 1969
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 85-98
- Monograph Title: Bridges
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Serial:
- Highway Research Record
- Issue Number: 295
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Analog to digital converters; Bridge design; Bridges; Computer programs; Data collection; Digital computers; Highway bridges; Live loads; Motion; Motor vehicles; Strain measurement; Structural design; Trucks
- Identifier Terms: Interstate Highway System
- Uncontrolled Terms: Moving vehicles
- Old TRIS Terms: Digital systems
- Subject Areas: Bridges and other structures; Highways; Motor Carriers;
Filing Info
- Accession Number: 00209151
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Mar 9 1970 12:00AM