CALCULATION FOR MOMENT OF INERTIAL OF STIFFENER

1308

130 8

68

SHELLcorroded thkickness 6

200

section Area Y AY H H2 AH2 Igsection Area Y AY H H2 AH2 Ig1 1200 3 3600 65 4225 5070000 36002 1040 71 73840 3 9 9360 14646673 1040 140 145600 72 5184 5391360 5546.667

Total = 3280 223040 10470720 1473813

Neutral Axis = 68

Moment of Inertia, I = 11944533 mm4

Section modulus, Z = 157164.9 mm3 157.1649 cm3

Section modulus is from wind direction. So y value is 144 - 68 =

76

B

B

B

Internal Pressure LoadD/2D/2

H/2 for Uniform pressure on

Shell

Wind Load on Shell

H

Liquid Hold Down Weight (wDesign Load (D

Wind Uplift Load

H

H/2 for Uniform

Internal Pressure LoadD/2

Wind Load on Shell

H

H/2 for Uniform

Internal Pressure LoadD/2

Wind Load on Shell H

Internal Pressure LoadD/2

Wind Load on Shell

H/2 for Uniform pressure on

Liquid Hold Down Weight (w

Design Load (D

H/2 for Uniform pressure on

Liquid Hold Down Weight (w

Design Load (D

H/2 for Uniform pressure on

Liquid Hold Down Weight (w

Design Load (D

Liquid Hold Down Weight (w

Wind Uplift Load

Internal Pressure Load

Moments about shell to bottom

joint

Liquid Hold Down Weight (wL)Design Load (DL)

Wind Uplift Load

Moments about shell to bottom

joint

Internal Pressure Load

Wind Uplift Load

Moments about shell to bottom

joint

Internal Pressure Load

Wind Uplift Load

Moments about shell to bottom

Internal Pressure Load

Liquid Hold Down Weight (wL)

Design Load (DL)

Liquid Hold Down Weight (wL)

Design Load (DL)

shell to bottom joint

Liquid Hold Down Weight (w )

Design Load (DL)

Liquid Hold Down Weight (wL)