A built up l-section has a total unsupported length of 6m. It is made up of 2 - 400mm x 12mm plates as flanges and 450mm x 12 mm plate as web. The plates are of Grade 40 steel (fy = 276MPa). Considering the local buckling of the stiffened and unstiffened slender elements, determine the ultimate axial load capacity of the built-up column for both LRFD and ASD. Use NSCP 2015 Specification and effective length factor k = 1.0. Properties of the built-up section: A = 15,000 mm² ly = 128.06 x 106 mm4 Ix = 6.035 x 108 mm4 rx = 200.58 mm ry = 92.40 mm What is the Slenderness Ratio? KL/r Using LRFD, what is the ultimate load capacity of the column? Express your answer in KN Using ASD, what is the allowable load capacity of the column? Express your answer in KN

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Chapter10: Plate Girders
Section: Chapter Questions
Problem 10.5.2P
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A built up l-section has a total unsupported length of 6m. It is made up of 2 - 400mm x
12mm plates as flanges and 450mm x 12 mm plate as web. The plates are of Grade 40
steel (fy = 276MPa). Considering the local buckling of the stiffened and unstiffened
slender elements, determine the ultimate axial load capacity of the built-up column for
both LRFD and ASD. Use NSCP 2015 Specification and effective length factor k = 1.0.
Properties of the built-up section:
A = 15,000 mm²
ly = 128.06 x 106 mm4
Ix = 6.035 x 108 mm4
rx = 200.58 mm
ry = 92.40 mm
What is the Slenderness Ratio? KL/r
Using LRFD, what is the ultimate load capacity of the column? Express your answer in KN
Using ASD, what is the allowable load capacity of the column? Express your answer in KN
Transcribed Image Text:A built up l-section has a total unsupported length of 6m. It is made up of 2 - 400mm x 12mm plates as flanges and 450mm x 12 mm plate as web. The plates are of Grade 40 steel (fy = 276MPa). Considering the local buckling of the stiffened and unstiffened slender elements, determine the ultimate axial load capacity of the built-up column for both LRFD and ASD. Use NSCP 2015 Specification and effective length factor k = 1.0. Properties of the built-up section: A = 15,000 mm² ly = 128.06 x 106 mm4 Ix = 6.035 x 108 mm4 rx = 200.58 mm ry = 92.40 mm What is the Slenderness Ratio? KL/r Using LRFD, what is the ultimate load capacity of the column? Express your answer in KN Using ASD, what is the allowable load capacity of the column? Express your answer in KN
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