SHEAR STRENGTH PREDICTION FOR SEPERATE CATEGORIES OF SIMPLE BEAM TESTS

THE ULTIMATE SHEAR STRENGTH OF SIMPLE RECTANGULAR BEAMS UNDER CONCENTRATED LOAD IS NOT ONLY A FUNCTION OF THE COMMON DESIGN PROPERTIES OF COMPANION CONCRETE CYLINDER STRENGTH, STEEL RATIO (AREA OF LONGITUDINAL TENSILE STEEL/BEAM WIDTH X BEAM EFFECTIVE DEPTH TO STEEL), SLENDERNESS (SHEAR SPAN/BEAM EFFECTIVE DEPTH TO STEEL), AND WEB REINFORCEMENT STIRRUP RATIO X STIRRUP YIELD STRESS) BUT ALSO IS STRONGLY INFLUENCED BY THE BEAM SUPPORT CONDITIONS. THE ACCURATE PREDICTION OF TEST BEAM STRENGTH MUST NECESSARILY CONSIDER ALL OF THESE FACTORS AVAILABLE BEAM TEST DATA ARE SEPARATED INTO THE DISTINCT CATEGORIES OF DIFFERENT STRENGTH BEHAVIOR, AND SIMPLE EMPIRICAL EQUATIONS ARE DERIVED FOR EACH CATEGORY. BEGINNING WITH A PREVIOUSLY DEVELOPED EQUATION FOR SLENDER (SLENDERNESS LESS THAN (2.5) BEAM SHEAR STRENGTH, EQUATIONS ARE DEVELOPED FOR SHORT (SLENDERNESS LESS THAN 2.5) INDIRECT OR SIDE BRACKET LOADED BEAMS WITH OR WITHOUT VERTICAL STIRRUPS AND SHORT DIRECT, TOP AND BOTTOM PLATE LOADED BEAMS WITH OR WITHOUT VERTICAL STIRRUPS. GOOD ENGINEERING PREDICTION RESULTS WITH THESE EQUATIONS, AND A DEFINITE AMOUNT OF DOWEL ACTION IS DETECTABLE IN BEAMS, WITH VERTICAL STIRRUPS, HAVING TWO LAYERS OF LONGITUDINAL REINFORCEMENT. /ACI/

• Supplemental Notes:
  • Vol 68, No 2, PP 138-143, 2 FIG, 15 REF, 1 APP
• Authors:
  • Zsutty, T
• Publication Date: 1971-2

Media Info

• Serial:
  • Am Concrete Inst Journal & Proceedings

Subject/Index Terms

• TRT Terms: Beams; Concrete tests; Equations; Flexural strength; Forecasting; Loads; Longitudinal reinforcement; Reinforcement (Engineering); Shear strength; Stirrups; Structural design; Structural supports; Structural tests; Thinness; Webbing
• Uncontrolled Terms: Slenderness ratio
• Old TRIS Terms: Empirical equations; Supports
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209392
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 25 1971 12:00AM