curtailment of flanges
TRANSCRIPT
DESIGN OF STEEL
STRUCTURES -II
NITINVERMA
DEPARTMENT OF CIVIL ENGINEERING
MOB:8968751741
Animated slides
CHAPTER-I
PLATE GIRDER
WHAT IS CURATILMENT?
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CUTTING
REDUCTION
DOCKINGLESSENING CUTBACK
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WHY
CURATILMENT?
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BEAM BEFORE BENDING
BEAM AFTER BENDING
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ON APPLICATION OF
UNIVERSALLY
DISTRIBUTED LOAD
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MAXIMUM BENDING
MOMENT(AT CENTER)
BENDING
MOMENT
DECREASES
BENDING
MOMENT
DECREASES
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AS BENDING MOMENT IS MAXIMUM AT CENTER AND
DECREASES AS WE APPROACH AT THE ENDS. THE
REQUIREMENTS OF PROVIDING PLATES AT END
DECREASES DUE TO LESSER BENDING MOMENT.
PROVIDING FLANGE COVER PLATES OTHER THAN THE
1SST FLANGE CCOVER PLATES TO FULL LENGTH
BECOMES UNECONOMICAL THEIRFORE FLANGE PLATES
ARE CURTAILED (EXCLUDING THE FIRST FLANGE COVER
PLATE )
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SPECIFICATIONS ALLOW THE FIRST FLANGE COVER PLATE OF A BOLTED
GIRDER TO BE CARRIED THROUGH THE LENGTH OF THE GIRDER TO
SERVE THE FOLLOWING PURPOSES:
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For a welded plate girder, however, the curtailment
of flange plate consists in reducing the thickness of
flange plate in proportion to the moments along the
span. At regions where bending moment is less than
that at the critical section, the thickness of plate can
be reduced (curtailed). The minimum section
classification at each such curtailed section,
however, must also be satisfied in addition to the
safety check for bending strength.
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University Civil Engineering Department