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Table 5 Optimization results in the distortional buckling mode using proportions of groups A, B, and C

From: Optimization of cold-formed lipped C-section under bending using prediction equations as objective functions

 

Optimum dimensions

Moment capacity using the original design method (kg.cm)

Moment capacity using proposed equations

(kg.cm)

Error

%

Area of section (mm2)

a

mm

b

mm

c

mm

Group A

533 (21 inches)

253 (9.95 inches)

44 (1.72 inches)

950,353 (824.87 kip.inch)

911,653.2 (791.28 kip.inch)

 − 4.24

2948.381

Group B

533 (21 inches)

218 (8.6 inches)

44 (1.72 inches)

929,764.6 (807 kip.inch)

918,243.3 (797 kip.inch)

 − 1.2

2767.736

Group C

533 (21 inches)

175 (6.88 inches)

44 (1.72 inches)

900,420 (781.53 kip.inch)

901,537.5 (782.5 kip.inch)

 + 0.12

2535.479