ULTIMATE STRENGTH OF BEAMS WITH RECTANGULAR HOLES

AN EXPERIMENTAL AND ANALYTICAL INVESTIGATION OF THE BEHAVIOR AND ULTIMATE STRENGTH OF WIDE-FLANGE BEAMS HAVING UNREINFORCED RECTANGULAR WEB HOLES IS SUMMARIZED. RECTANGULAR HOLES WERE CHOSEN BECAUSE OF THEIR PREVALENCE IN PRACTICE. FOUR 10-FT LONG 16WF36 SIMPLY SUPPORTED BEAMS WERE TESTED WITH ONE OR TWO CONCENTRATED LOADS. RESULTS SHOWED THAT AS THE LOAD ON THE BEAM WITH A WEB HOLE INCREASES, THE FIRST YIELDING IN THE BEAM IN THE VICINITY OF THE HOLE OCCURS AT THE CORNERS OF THE HOLE AS A RESULT OF STRESS CONCENTRATION AT THE CORNER. WITH FURTHER INCREASE OF THE LOAD, YIELDING SPREADS THROUGH THE WEB AND THROUGH THE FLANGES. THE ULTIMATE LOAD CAN BE PREDICTED BY A LOWER-BOUND SOLUTION IN WHICH STRAIN HARDENING IS NEGLECTED. THE ULTIMATE LOADS FOR THE TEST BEAMS AVERAGED 19% BELOW THE EXPERIMENTAL LOADS. THE ALLOWABLE DESIGN LOADS INDICATE THAT THE PLASTIC-DESIGN ANALYSIS GIVES THE GREATER ALLOWABLE LOAD, EXCEPT AT VERY HIGH MOMENT-SHEAR RATIOS. /ASCE/

• Supplemental Notes:
  • Vol 94, No ST 6, PROC PAPER 5982, PP 1315-1337, 15 FIG,
• Authors:
  • BOWER, J E
• Publication Date: 1968-6

Media Info

• Serial:
  • Journal of the Structural Division
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Beams; Breaking loads; Flanges; Holes; Load tests; Structural analysis; Ultimate load design; Ultimate strength; Webbing
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208488
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 29 1994 12:00AM