DYNAMIC TESTS OF A THREE-SPAN CONTINUOUS I-BEAM HIGHWAY BRIDGE
THIS PAPER PRESENTS THE RESULTS OF THE STATIC AND DYNAMIC TESTING OF A THREE-SPAN CONTINOUS I-BEAM HIGHWAY BRIDGE. LIVE LOAD STRESS FREQUENCY CURVES FOR SELECTED POINTS ARE SHOWN, AND THE STATIC AND DYNAMIC LOAD DISTRIBUTION TO THE LONGITUDINAL COMPOSITE BEAM MEMBERS ARE GIVEN. THE BRIDGE HAS FOUR TRAFFIC LANES WITH A ROADWAY WIDTH OF 48 FT. SIX LONGITUDINAL CONTINOUS WF BEAMS ACT COMPOSITELY WITH THE REINFORCED CONCRETE SLAB TO CARRY THE LIVE LOAD. THE BEAMS HAVE PARTIAL LENGTH COVER PLATES AT THE PIERS. PREVIOUS RESEARCH HAS INDICATED THAT BEAMS WITH PARTIAL LENGTH COVER PLATES HAVE A VERY LOW FATIGUE STRENGTH. IT WAS FOUND IN THIS RESEARCH THAT THE MAGNITUDE OF THE STRESSES DUE TO ACTUAL HIGHWAY LOADS WERE VERY MUCH SMALLER THAN THOSE COMPUTED FROM SPECIFICATION LOADING. ALSO, THE LARGER STRESSES WHICH WERE MEASURED OCCURRED A RELATIVELY SMALL NUMBER OF TIMES. THESE DATA INDICATE THAT SOME REQUIREMENTS FOR REDUCED ALLOWABLE STRESSES AT THE ENDS OF COVER PLATES ARE TOO CONSERVATIVE. THE LOAD DISTRIBUTION TO THE LONGITUDINAL BEAMS WAS DETERMINED FOR STATIC AND MOVING LOADS AND INCLUDES THE EFFECT OF IMPACT ON THE DISTRIBUTION. THE EFFECTIVE COMPOSITE SECTION WAS FOUND AT VARIOUS LOCATIONS TO EVALUATE THE LOAD DISTRIBUTION DATA. THE COMPOSITE ACTION WAS IN NEGATIVE AS WELL AS POSITIVE MOMENT REGIONS. THE LOAD DISTRIBUTION DATA INDICATE THAT THE LATERAL DISTRIBUTION OF LIVE LOAD IS CONSISTENT WITH THE SPECIFICATIONS, BUT THAT THERE IS LONGITUDINAL DISTRIBUTION, AND THEREFORE THE SPECIFICATIONS ARE TOO CONSERVATIVE. /AUTHOR/
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Supplemental Notes:
- No 279, pp 18-46, 17 FIG, 9 REF 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:
- Hulsbos, C L
- Linger, D A
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Conference:
- 39th Annual Meeting of the Highway Research Board
- Location: Washington DC, United States
- Date: 1960-1-11 to 1960-1-15
- Publication Date: 1961
Media Info
- Media Type: Digital/other
- Pagination: 29p
- Monograph Title: Bridge design studies and piling tests, 1960
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Serial:
- Highway Research Board Bulletin
- Issue Number: 279
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Beams; Bridge superstructures; Composite materials; Dynamic tests; Highway bridges; I beams; Load tests; Load transfer; Static tests; Stresses; Structural plates
- Uncontrolled Terms: Bridge spans
- Old TRIS Terms: Composite beam; Cover plates
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00208808
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 12 1994 12:00AM