VIERENDEEL BENT CAPS

THE FINITE ELEMENT TECHNIQUE WAS USED TO ASSESS THE EFFECTS OF LARGE WEB OPENINGS IN THE BENT CAP REGION OF CONCRETE BOX GIRDER HIGHWAY BRIDGES. BENT CAPS WERE MODELED WHICH CONTAINED OPENINGS RANGING IN SIZE FROM 0.21 TO 0.625 OF THE MEMBER DEPTH. THE SHAPE AND LOCATION OF THE OPENING WAS VARIED. SIXTY SUPPORTED BEAMS WERE ALSO ANALYZED TO PROVIDE THE BASIS FOR A WORKING STRESS DESIGN PROCEDURE TO BE USED FOR DETERMINING THE REINFORCING REQUIREMENTS IN THE VICINITY OF THE OPENING. THE ANALYSES SHOWED THAT A DESIGN BASED ON A SINGLE RECTANGULAR OPENING WOULD BE SATISFACTORY AS LONG AS ADJACENT OPENINGS WERE SEPARATED BY AT LEAST HALF THE DEPTH OF THE MEMBER. THE VIERENDEEL METHOD WAS FOUND TO BE ACCEPTABLE FOR DESIGNING THE REINFORCING IN THE CHORD REGIONS OF THE OPENING, WHILE SPECIAL CURVES WERE DEVELOPED TO PERMIT THE DESIGN OF THE REINFORCING NEEDED TO RESIST THE STRESS CONCENTRATIONS AT THE CORNERS. TWELVE LABORATORY SPECIMENS WERE DESIGNED IN ACCORDANCE WITH THE SUGGESTED DESIGN PROCEDURE TO TEST ITS VALIDITY. SUBSEQUENT TESTING INDICATED THAT THE REINFORCING PROVIDED AROUND THE OPENING ADEQUATELY STENGTHENED THIS PORTION OF THE MEMBER SO THAT THE LOAD CARRYING CAPACITY WAS GOVERNED BY THE BEHAVIOR OF THE SOLID PART OF THE BEAM. A SAMPLE DESIGN OF A TYPICAL CANTILEVER BENT CAP WITH A LARGE RECTANGULAR WEB IS INCLUDED. /AUTHOR/

  • Supplemental Notes:
    • 0-4-62
  • Corporate Authors:

    University of California, Davis

    Department of Civil and Environmental Engineering, One Shields Avenue
    Davis, CA  United States  95616
  • Authors:
    • Ramey, M R
  • Publication Date: 1972-7

Media Info

  • Pagination: 116 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00208066
  • Record Type: Publication
  • Source Agency: California Department of Public Works
  • Files: TRIS
  • Created Date: Feb 11 1973 12:00AM