SEA FASTENING CALCULATIONS FOR EVAPORATOR ON DB-1

PIPE GUSSET DESIGN

Yield Strength of Pad-Eye Plate Fyp 50ksiUltimate strength of pad-eye plate Fup 65ksi For ASTM A572 Gr.Modulus of Elasticity of steel E 20000MPaWeld Ultimate Strength of E70xx electrode assumed Fuw 70ksiYield stress of pin for Gr.55 Pin Fypin 340MPaDiameter of pin dpin 100mmLength of pad-eye plate Lp 300mmThickness of pad-eye plate tp 40mm

Radius of main plate Rp 160mm

Hole diameter provided dhole 103mm

"Hole diameter is O.K." dhole max dpin 3mm 100mm if"Hole dimater is not sufficient" otherwise

"Hole diameter is O.K."

Edge distance of pin lc 160mmForce in Brace Fb 1037.59kN Maximum for longitudinal brace

Check for Pin

Force normal to pin Fnpin Fb 1037.59 kN

Nominal shear strength of pin Rnvp 0.6 Fypin 204 MPa

Allowable stress factor for shear 1.67

Allowable shear stress in pin FnvpRnvp

122.16 MPa

Actual shear stress in pin fnvpFnpin

21

4dpin

2 66.06 MPa For double shear

UCpinfnvpFnvp

0.54

Checks for pad-eye Plate

Shear Rupture

Net area subject to shear Anv Rpdhole

2

tp 2 8680 mm2

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SEA FASTENING CALCULATIONS FOR EVAPORATOR ON DB-1

PIPE GUSSET DESIGN

Nominal strength in shear rupture Rnv 0.6 Fup Anv 2334.01 kN

Allowable stress factor for shear 2.0

Allowable shear strength of pad-eye plate FnvRnv

1167.01 kN

UCshear_ruptureFbFnv

0.89

Tensile Rupture

Net area subjected to tension Ant 2 Rp dhole tp 8680 mm2Nominal strength in tensile rupture Rnt 0.6 Fup Ant 2334.01 kN

Allowable stress factor for tension 2.0

Allowable tensile strength of pad-eye plate FnvRnt

1167.01 kN

UCtensile_ruptureFbFnv

0.89

Bearing check of Pin on plate

Projected area in bearing Apb dpin tp 4000 mm2

Nominal bearing strength of pad-eye plate and pin Rnb 1.8 min Fyp Fypin Apb 2448 kNAllowable stress factor for bearing 2.0

Allowable bearing strength of pad-eye plate or pin FnbRnb

1224 kN

UCbearingFbFnb

0.85

Weld Checking with Tubular

Slotted length Ls 300mm

Number of fillet weld lines n 4

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SEA FASTENING CALCULATIONS FOR EVAPORATOR ON DB-1

PIPE GUSSET DESIGN

Weld thickness tweld 12mm

Total weld area Aweld 0.707 tweld n Ls 10180.8 mm2

Shear stress in weld FwFb

Aweld101.92 MPa

UCweldFw

0.3 Fuw0.7

Buckling Check for Gusset Plate

Effective length factor kgp 0.5

Area of plate A Lp tp 12000 mm2

Major axis Moment of Inertial of gusset plate

Igpxtp Lp

312

90000000 mm4

Minor axis Moment of Inertial of gusset plate

Igpytp

3 Lp12

1600000 mm4

minimum radius of gyration rmin Igpx Igpy

A11.55 mm

Slenderness ratio kkgp 180mm

dhole2

r5.56

Elastic Buckling Stress Fe

2 Ek2

6375.62 MPa

Critical Buckling Stress Fcr 0.658

FypFe Fyp

k 4.71 EFypif

0.877 Fe otherwise

337.02 MPa

Nominal Compressive Stress Pn Fcr A 4044.28 kN

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SEA FASTENING CALCULATIONS FOR EVAPORATOR ON DB-1

PIPE GUSSET DESIGN

UCcompressionFbPn

0.51

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