PILOT TESTS ON THE ULTIMATE STATIC STRENGTH OF UNSYMMETRICAL PLATE GIRDERS
EIGHT ULTIMATE LOAD TESTS WERE PERFORMED ON THREE 36-INCH DEEP UNSYMMETRICAL PLATE GIRDERS. ONE GIRDER WAS 25 FEET LONG, TWO WERE 30 FEET LONG. ALL GIRDERS CONTAINED THE SAME CROSS SECTION WITH THE AREA OF THE BOTTOM FLANGE 2 1/2 TIMES LARGER THAN THE TOP FLANGE, SO THAT THE CENTROIDAL AXIS WAS APPROXIMATELY ONE-SIXTH OF THE DEPTH BELOW THE MID-DEPTH OR GEOMETRIC CENTER OF THE WEB PLATE. THE WEB SLENDERNESS RATIO FOR ALL SPECIMENS WAS 295. THE PANELS HAD ASPECT RATIOS OF 0.8, 1.2 AND 1.6. THE LOADING CONDITIONS EMPLOYED WERE PURE BENDING, DOMINANT SHEAR, AND COMBINED SHEAR BENDING. A COMPARISON OF THE EXPERIMENTAL ULTIMATE STRENGTHS WITH THOSE COMPUTED USING THE THEORIES DEVELOPED BY BASLER AND THURLIMANN SHOWS THE GIRDER STRENGTHS UNDER DOMINANT SHEAR TO BE 18% HIGHER THAN THE THEORETICAL VALUES. THE ULTIMATE LOADS FROM THE BENDING TESTS WERE ALSO HIGHER THAN PREDICTED. THE TESTS UNDER COMBINED HIGH BENDING AND HIGH SHEAR GAVE STRENGTHS WHICH WERE LOWER THAN INDICATED BY THE CURRENT ULTIMATE STRENGTH INTERACTION ENVELOPE. THE TEST RESULTS OBTAINED WILL SERVE AS A BASIS FOR DEVELOPING A NEW, MORE ACCURATE THEORY FOR DETERMINING THE STATIC STRENGTH OF UNSYMMETRICAL PLATE GIRDERS. /AUTHOR/
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Supplemental Notes:
- Hpr, Bpr-328.5, STATE-37383
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Corporate Authors:
Lehigh University
Bethlehem, PA United States 18015Pennsylvania Department of Highways
400 North Street
Harrisburg, PA United States 17120-0095Bureau of Public Roads /US
400 7th Street, SW
Washington, DC United States 20590 -
Authors:
- Dimitri, J R
- Ostapenko, A
- Publication Date: 1968-6
Subject/Index Terms
- TRT Terms: Bend tests; Bending; Breaking loads; Flanges; Load tests; Ratios; Shear strength; Symmetry; Ultimate strength
- Uncontrolled Terms: Aspect ratio
- Subject Areas: Bridges and other structures; Highways;
Filing Info
- Accession Number: 00207895
- Record Type: Publication
- Source Agency: Bureau of Public Roads /US
- Files: TRIS
- Created Date: Mar 5 1994 12:00AM