ROTATION CAPACITY OF BEAMS UNDER MOMENT GRADIENT

INVESTIGATION ATTEMPTS TO RELATE THE FLANGE SLENDERNESS RATIO TO THE ROTATION CAPACITY OF STEEL WIDE-FLANGE BEAMS SUBJECTED TO A MOMENT GRADIENT. THE STEEL USED WAS CSA G 40.12, A LOW ALLOY STEEL HAVING A SPECIFIED MINIMUM YIELD STRESS OF 44 KSI. THE REPORTED TESTS WERE PERFORMED ON SIMPLE-SUPPORTED BEAMS, SUBJECTED TO A CONCENTRATED LOAD AT MIDSPAN. THE FLANGE AND WEB GEOMETRY WERE VARIED, WHILE THE LATERALLY UNBRACED SLENDERNESS RATIO WAS HELD CONSTANT. ALL TESTS WERE CONTINUED UNTIL SUBSTANTIAL UNLOADING HAD OCCURRED DUE TO THE EFFECTS OF INSTABILITY. IN ALL CASES ROTATION CAPACITY WAS TERMINATED BY LOCAL BUCKLING OF THE COMPRESSION FLANGE ACCOMPANIED BY LARGE LATERAL DEFORMATIONS OF THE UNBRACED SPAN. FOR BEAMS UNDER HIGH MOMENT GRADIENT THE LENGTH OF THE LOCAL BUCKLE WAS RESTRICTED BY THE EXTENT OF YIELDING, WHILE FOR BEAMS UNDER LOWER MOMENT GRADIENT THE LOCAL BUCKLE OCCUPIED ONLY PART OF THE YIELDED LENGTH. /ASCE/

• Supplemental Notes:
  • Vol 95 No ST 6, PROC PAPER 6599, PP 1173-1188, 13 FIG,
• Authors:
  • Lukey, A F
  • Adams, P F
• Publication Date: 1969-6

Media Info

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

Subject/Index Terms

• TRT Terms: Beams; Compression; Deformation; Engineering moments; Flanges; Highway grades; Low alloy steel; Plastic analysis; Rotation; Slopes; Thinness; Yield strength
• Uncontrolled Terms: Lateral loads; Slenderness ratio
• Old TRIS Terms: Moments; Plastic analysis (Structural)
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209044
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 29 1994 12:00AM