STATIC TESTS ON LONGITUDINALLY STIFFENED PLATE GIRDERS

TWO SERIES OF STATIC TESTS ON LONGITUDINALLY STIFFENED PLATE GIRDERS ARE DESCRIBED. THE FIRST SERIES CONSISTED OF SIX STATIC BENDING TESTS ON SIX LONGITUDINALLY STIFFENED SPECIMENS. THE EXPERIMENTAL VARIABLES WERE THE PANEL SIZE AND THE LONGITUDINAL STIFFENER SIZE. THE PRIMARY OBJECTIVES OF THIS SERIES WERE' /1/ TO DETERMINE TO WHAT EXTENT LONGITUDINAL STIFFENERS CAN CONTRIBUTE TO THE RESISTANCE OF THE WEB TO VERTICAL BUCKLING OF THE COMPRESSION FLANGE, /2/ TO DETERMINE HOW THE STRESS REDISTRIBUTION AT LOADS ABOVE THE THEORETICAL WEB BUCKLING LOAD IS AFFECTED BY THE PRESENCE OF A LONGITUDINAL STIFFENER AND /3/ TO DETERMINE TO WHAT EXTENT LATERAL WEB DEFLECTIONS CAN BE REDUCED BY THE USE OF A LONGITUDINAL STIFFENER. THE SECOND TEST SERIES CONSISTED OF EIGHT STATIC SHEAR TESTS ON FOUR LONGITUDINALLY STIFFENED PLATE GIRDERS. THE EXPERIMENTAL VARIABLES WERE THE PANEL ASPECT RATIO AND THE LONGITUDINAL STIFFENER LOCATION AND SIZE. THE PRIMARY OBJECTIVES OF THESE TESTS WERE TO DETERMINE THE EFFECT OF LONGITUDINAL STIFFENERS ON THE STATIC BEHAVIOR OF PLATE GIRDER PANELS SUBJECTED TO HIGH SHEAR AND TO DETERMINE THE CONTRIBUTION OF LONGITUDINAL STIFFENERS TO THE STATIC SHEAR STRENGTH OF PLATE GIRDERS. THE TEST SETUPS AND TEST PROCEDURES ARE DESCRIBED AND THE RESULTS ARE ANALYZED AND DISCUSSED. FOR THE BENDING TESTS THE LONGITUDINAL STIFFENERS WERE EFFECTIVE IN RETARDING STRESS REDISTRIBUTION AND IN CONTROLLING WEB DELFECTIONS. HOWEVER, THE LONGITUDINAL STIFFENERS WHICH WERE USED IN THESE TESTS HAD NO SIGNIFICANT EFFECT UPON THE OBSERVED ULTIMATE LOADS, EXCEPT FOR ONE TEST WHERE AN 11% INCREASE IN THE ULTIMATE LOAD WAS REALIZED. FROM THE SHEAR TESTS IT IS CONCLUDED THAT THE LONGITUDINAL STIFFENERS WERE EFFECTIVE IN CONTROLLING WEB DEFLECTIONS, FORCING SEPARATE TENSION FIELDS TO DEVELOP IN THE SUBPANELS FORMED BY THE LONGITUDINAL STIFFENERS. THE SHEAR STRENGTHS OF THE TEST GIRDERS WERE INCREASED FROM 6% TO 38% DUE TO THE LONGITUDINAL STIFFENERS. /AUTHOR/

• Supplemental Notes:
  • Hpr-1/3/, STATE NO 361
• Corporate Authors:

  Lehigh University

  Bethlehem, PA  United States  18015
• Authors:
  • Dapice, M A
  • Fielding, D J
  • Copper, P B
• Publication Date: 1966-5

Subject/Index Terms

• TRT Terms: Bend tests; Buckling; Deflection; Location; Plate girders; Ratios; Reduction (Chemistry); Shear strength; Shear tests; Size; Static tests; Stiffeners (Plates); Webbing
• Uncontrolled Terms: Aspect ratio; Longitudinal
• Old TRIS Terms: Lateral movement; Reduction; Resistance; Stiffeners
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00207796
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 1 1994 12:00AM