LOCAL BUCKLING IN CONTINUOUS COMPOSITE BEAMS

CONTINUOUS COMPOSTIE BEAMS CAN ONLY BE DESIGNED BY SIMPLE PLASTIC THEORY IF THE HINGES AT THE SUPPORTS HAVE ADEQUATE ROTATION CAPACITY. THIS IS OFTEN CONTROLLED BY LOCAL BUCKLING OF THE WEBS AND FLANGES. TESTS TO DETERMINE THE EFFECT OF LOCAL BUCKLING ON THE ROTATION CAPACITY OF COMPOSITE BEAMS UNDER NEGATIVE BENDING ARE DESCRIBED. COMPARISONS ARE MADE WITH LIMITING WEB AND FLANGE SLENDERNESS RATIOS CURRENTLY USED IN STEEL DESIGN BOTH IN GREAT BRITAIN AND IN NORTH AMERICA. IT IS FOUND THAT SOME OF THE EXISTING REGULATIONS CAN BE APPLIED TO COMPOSITE BEAMS, BUT THAT OTHERS MAY BE UNSAFE, FOR BOTH STEEL AND COMPOSITE BEAMS. ALTERNATIVE RULES ARE PROPOSED. TESTS ON BEAMS WITH LONGITUDINAL WEB STIFFENERS ARE ALSO DESCRIBED. THESE SHOW IMPROVED MOMENT-ROTATION CHARACTERISTICS, AND TENTATIVE CONCLUSIONS ARE GIVEN AS AN AID IN PLANNING FURTHER RESEARCH AND FOR THE DEVELOPMENT OF DESIGN RULES. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/14665123
• Authors:
  • Climenhaga, J J
  • Johnson, R P
• Publication Date: 1972-9

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 367-74
• Serial:
  • Structural Engineer
  • Volume: 50
  • Issue Number: 9
  • Publisher: Institution of Structural Engineers
  • ISSN: 1466-5123

Subject/Index Terms

• TRT Terms: Beams; Buckling; Composite materials; Continuous structures; Design; Flanges; Rotation; Stiffeners (Plates); Webbing
• Uncontrolled Terms: Composite beams; Continuous beams; Steel beams
• Old TRIS Terms: Design information; Stiffeners
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 00210201
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Oct 24 1973 12:00AM