MODEL STUDIES ON A BEAM-AND-SLAB CONCRETE BRIDGE UNDER CONCENTRATED LOADINGS

THE DECK OF A TUNNEL UNDER AN AIRPORT RUNWAY IS SUBJECTED TO LARGE CONCERTATED LOADS, WHICH MAKE IT IMPERATIVE THAT DESIGN METHODS BE CHECKED EXPERIMENTALLY TO VERIFY DISTRIBUTION OF LOADS, STRESSES AND DEFLECTIONS. MODEL INVESTIGATIONS ARE UNDERTAKEN TO CHECK AVAILABLE THEORIES AND OBTAIN INFORMATION ON MODES OF FAILURE. TWO MODELS ARE USED, A SMALL-SCALE PLASTIC MODEL FOR ELASTIC STUDIES AND A LARGER SCALED CONCRETE MODEL TO STUDY BEHAVIOR UP TO FAILURE WITH THE ACTUAL MATERIALS OF THE DECK. ALTHOUGH THE GENERAL BEHAVIOR OF THE COMPOSITE BEAM-AND-SLAB BRIDGE DECK IN THE ELASTIC RANGE IS ADEQUATELY PREDICTED BY THE EQUIVALENT-ORTHOTROPIC-PLATE METHOD OF ANALYSIS, LARGE LOCAL FLEXURAL AND SHEAR STRESSES PRODUCED BY LOADS APPLIED BETWEEN DIAPHRAGMS ARE NOT ACCURATELY PREDICTED. HOWEVER, IT WAS FOUND THAT THESE LOCAL EFFECTS WERE REDISTRIBUTED AND MADE NO DIFFERENCE TO THE ULTIMATE LOAD. THE DISTRIBUTION CHARACTERISTICS OF THE DECK ARE MAINTAINED THROUGHOUT THE LOAD RANGE UP TO ULTIMATE LOAD. /RRL/A/

• Supplemental Notes:
  • pp 55-74, 14 FIG, 1 TAB, 8 REF
• Corporate Authors:

  Intl Symp Concr Bridge Des Proc /Can

  ,    
• Authors:
  • Stevens, L K
  • Gosbell, K B
• Publication Date: 1969

Subject/Index Terms

• TRT Terms: Beams; Behavior; Bridge decks; Concrete bridges; Deflection; Elasticity (Mechanics); Failure; Flexure; Load transfer; Loads; Orthotropic; Shear stress; Slabs; Structural plates
• Uncontrolled Terms: Model tests; Plates
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208676
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Nov 23 1970 12:00AM