SECTION C:
TEST CASE
This analysis is intent to check stresses on skirt and basering. Thus, calculation provided in this section is only related to that such input echo, wind & earthquake, combines load stress and basering
calculation. Full analysis / reports, shall refer to section B “Operating Case”
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 155 Input Echo : Step: 1 11:08a Jan 30,2014
PV Elite Vessel Analysis Program: Input Data
Design Internal Pressure (for Hydrotest) 16.000 bar Design Internal Temperature 60 C Type of Hydrotest User Defined Hydro Hydrotest Position Horizontal Projection of Nozzle from Vessel Top 0.0000 mm Projection of Nozzle from Vessel Bottom 150.00 mm Minimum Design Metal Temperature 0 C Type of Construction Welded Special Service None Degree of Radiography RT-1 Miscellaneous Weight Percent 5.0 Use Higher Longitudinal Stresses (Flag) Y Select t for Internal Pressure (Flag) N Select t for External Pressure (Flag) N Select t for Axial Stress (Flag) N Select Location for Stiff. Rings (Flag) N Consider Vortex Shedding N Perform a Corroded Hydrotest N Is this a Heat Exchanger No User Defined Hydro. Press. (Used if > 0) 25.481 bar User defined MAWP 0.0000 bar User defined MAPnc 0.0000 bar (Load Case applicable for Test case is as below)
Load Case 1 NP+HW+0.25HI+HE Load Case 2 HP+HW+0.25HI+HE Load Case 3 IP+WF+CW Wind Design Code ASCE-7 98/02/05/IBC-03/STS-1 Basic Wind Speed [V] 43.400 m/sec Surface Roughness Category C: Open Terrain Importance Factor 1.15 Type of Surface Moderately Smooth Base Elevation 19664. mm
(Vessel is located on structure skid, T.O.S EL+ 19664. Refer Dwg. No.:
MLK-58863004234001-B01-39002-0042065-M-DW-001.) Percent Wind for Hydrotest 25.0 Using User defined Wind Press. Vs Elev. N Height of Hill or Escarpment H or Hh 0.0000 mm Distance Upwind of Crest Lh 0.0000 mm Distance from Crest to the Vessel x 0.0000 mm Type of Terrain ( Hill, Escarpment ) Flat Damping Factor (Beta) for Wind (Ope) 0.0150 Damping Factor (Beta) for Wind (Empty) 0.0000 Damping Factor (Beta) for Wind (Filled) 0.0000 Seismic Design Code G Loading (Skid is located at production deck, EL+ 18000 and motion load for 1 year
Operating is as below.)
Seismic Importance Factor 1.000 G Loading Coefficient Gx 0.087 G Loading Coefficient Gz 0.087 G Loading Coefficient Gy 0.049 Percent Seismic for Hydrotest 100.000
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 156 Input Echo : Step: 1 11:08a Jan 30,2014 Consider MAP New and Cold in Noz. Design N Consider External Loads for Nozzle Des. Y Use ASME VIII-1 Appendix 1-9 N Material Database Year Current w/Addenda or Code Year Configuration Directives:
Do not use Nozzle MDMT Interpretation VIII-1 01-37 No Use Table G instead of exact equation for "A" Yes Shell Head Joints are Tapered Yes Compute "K" in corroded condition Yes Use Code Case 2286 No Use the MAWP to compute the MDMT Yes
Using Metric Material Databases, ASME II D No Complete Listing of Vessel Elements and Details:
Element From Node 10 Element To Node 20 Element Type Skirt Sup.
Description SKIRT Distance "FROM" to "TO" 850.00 mm Skirt Outside Diameter 2468.0 mm Diameter of Skirt at Base 2468.0 mm Skirt Thickness 9.5300 mm
(9.53mm is a standard thickness for carbon steel available in the market)
Internal Corrosion Allowance 0.0000 mm Nominal Thickness 9.5300 mm External Corrosion Allowance 0.0000 mm Design Temperature Internal Pressure 60 C Design Temperature External Pressure 60 C Effective Diameter Multiplier 1.2 Material Name [Normalized] SA-516 70 Allowable Stress, Ambient 1379.0 bar Allowable Stress, Operating 1379.0 bar Allowable Stress, Hydrotest 2358.0 bar Material Density 7750.4 kg/m³ P Number Thickness 29.997 mm Yield Stress, Operating 2493.2 bar UCS-66 Chart Curve Designation D External Pressure Chart Name CS-2 UNS Number K02700 Product Form Plate Efficiency, Longitudinal Seam 0.7 Efficiency, Head-to-Skirt or Circ. Seam 0.7 --- Element From Node 20 Element To Node 30 Element Type Elliptical Description BOTTOM HEAD
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 157 Input Echo : Step: 1 11:08a Jan 30,2014 Distance "FROM" to "TO" 50.000 mm Inside Diameter 2430.0 mm Element Thickness 18.000 mm Internal Corrosion Allowance 3.0000 mm Nominal Thickness 22.200 mm
(22.2mm is a standard thickness for carbon steel available in the market)
External Corrosion Allowance 0.0000 mm Design Internal Pressure 16.000 bar Design Temperature Internal Pressure 60 C Design External Pressure 1.0342 bar Design Temperature External Pressure 60 C Effective Diameter Multiplier 1.2 Material Name [Normalized] SA-516 70 Efficiency, Longitudinal Seam 1.0 Efficiency, Circumferential Seam 1.0 Elliptical Head Factor 2.0 Element From Node 20 Detail Type Liquid Detail ID WATER 1 Dist. from "FROM" Node / Offset dist -607.50 mm Height/Length of Liquid 657.50 mm Liquid Density 1000.0 kg/m³ (water with density 1000kg/m3 is used for hydrotest)
Element From Node 20 Detail Type Nozzle Detail ID N5 Dist. from "FROM" Node / Offset dist 0.0000 mm Nozzle Diameter 50.799999 mm Nozzle Schedule None Nozzle Class 150
Layout Angle 180.0 Blind Flange (Y/N) N Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl [Normalized] SA-105 Element From Node 20 Detail Type Weight Detail ID INT.PLATE Dist. from "FROM" Node / Offset dist 50.000 mm Miscellaneous Weight 4961.8 N Offset from Element Centerline 0.0000 mm ---
Element From Node 30 Element To Node 40 Element Type Cylinder Description SHELL Distance "FROM" to "TO" 1730.0 mm Inside Diameter 2430.0 mm Element Thickness 19.050 mm (19.05mm is a standard thickness for carbon steel available in the market)
Internal Corrosion Allowance 3.0000 mm
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 158 Input Echo : Step: 1 11:08a Jan 30,2014 Nominal Thickness 19.050 mm External Corrosion Allowance 0.0000 mm Design Internal Pressure 16.000 bar Design Temperature Internal Pressure 60 C Design External Pressure 1.0342 bar Design Temperature External Pressure 60 C Effective Diameter Multiplier 1.2 Material Name [Normalized] SA-516 70 Efficiency, Longitudinal Seam 1.0 Efficiency, Circumferential Seam 1.0 Element From Node 30 Detail Type Liquid Detail ID WATER 2 Dist. from "FROM" Node / Offset dist 0.0000 mm Height/Length of Liquid 1730.0 mm Liquid Density 1000.0 kg/m³ (water with density 1000kg/m3 is used for hydrotest)
Element From Node 30 Detail Type Nozzle Detail ID N1 Dist. from "FROM" Node / Offset dist 1453.0 mm Nozzle Diameter 200.0 mm Nozzle Schedule 160 Nozzle Class 150 Layout Angle 0.0 Blind Flange (Y/N) N Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl SA-106 B Element From Node 30 Detail Type Nozzle Detail ID N2 Dist. from "FROM" Node / Offset dist 277.00 mm Nozzle Diameter 200.0 mm
Nozzle Schedule 160 Nozzle Class 150 Layout Angle 144.0 Blind Flange (Y/N) N Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl SA-106 B Element From Node 30 Detail Type Nozzle Detail ID N3 Dist. from "FROM" Node / Offset dist 1493.0 mm Nozzle Diameter 150.0 mm Nozzle Schedule 160 Nozzle Class 150 Layout Angle 21.3862 Blind Flange (Y/N) N
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 159 Input Echo : Step: 1 11:08a Jan 30,2014 Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl SA-106 B Element From Node 30
Detail Type Nozzle Detail ID H1 Dist. from "FROM" Node / Offset dist 365.00 mm Nozzle Diameter 300.0 mm Nozzle Schedule 120 Nozzle Class 150 Layout Angle 165.0 Blind Flange (Y/N) Y Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl SA-106 B Element From Node 30 Detail Type Weight Detail ID ANODES Dist. from "FROM" Node / Offset dist 1258.0 mm Miscellaneous Weight 784.48 N Offset from Element Centerline 0.0000 mm --- Element From Node 40 Element To Node 50 Element Type Elliptical Description TOP HEAD Distance "FROM" to "TO" 50.000 mm
Inside Diameter 2430.0 mm Element Thickness 18.000 mm Internal Corrosion Allowance 3.0000 mm Nominal Thickness 22.200 mm
(22.2mm is a standard thickness for carbon steel available in the market)
External Corrosion Allowance 0.0000 mm Design Internal Pressure 16.000 bar Design Temperature Internal Pressure 60 C Design External Pressure 1.0342 bar Design Temperature External Pressure 60 C Effective Diameter Multiplier 1.2 Material Name [Normalized] SA-516 70 Efficiency, Longitudinal Seam 1.0 Efficiency, Circumferential Seam 1.0 Elliptical Head Factor 2.0 Element From Node 40 Detail Type Liquid Detail ID WATER 3 Dist. from "FROM" Node / Offset dist 0.0000 mm Height/Length of Liquid 657.50 mm Liquid Density 1000.0 kg/m³ (water with density 1000kg/m3 is used for hydrotest)
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 160 Input Echo : Step: 1 11:08a Jan 30,2014 Element From Node 40 Detail Type Nozzle Detail ID N4 Dist. from "FROM" Node / Offset dist 803.00 mm Nozzle Diameter 80.0 mm Nozzle Schedule 160 Nozzle Class 150 Layout Angle 240.0 Blind Flange (Y/N) N Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl SA-106 B Element From Node 40 Detail Type Nozzle Detail ID M1 Dist. from "FROM" Node / Offset dist 535.00 mm Nozzle Diameter 762.0 mm Nozzle Schedule None Nozzle Class 150 Layout Angle 45.0 Blind Flange (Y/N) Y Weight of Nozzle ( Used if > 0 ) 0.0000 N Grade of Attached Flange GR 1.1 Nozzle Matl [Normalized] SA-516 70 PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2012
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 161 Wind Load Calculation : Step: 8 11:08a Jan 30,2014 Input Values:
Wind Design Code ASCE-7 98/02/05/IBC-03/STS-1 Basic Wind Speed [V] 43.400 m/sec Surface Roughness Category C: Open Terrain Importance Factor 1.15 Type of Surface Moderately Smooth Base Elevation 19664. mm Percent Wind for Hydrotest 25.0 Using User defined Wind Press. Vs Elev. N Height of Hill or Escarpment H or Hh 0.0000 mm Distance Upwind of Crest Lh 0.0000 mm Distance from Crest to the Vessel x 0.0000 mm Type of Terrain ( Hill, Escarpment ) Flat Damping Factor (Beta) for Wind (Ope) 0.0150 Damping Factor (Beta) for Wind (Empty) 0.0000 Damping Factor (Beta) for Wind (Filled) 0.0000 Wind Analysis Results Static Gust-Effect Factor, Operating Case [G]:
= min(0.85, 0.925((1 + 1.7 * gQ * Izbar * Q )/( 1 + 1.7 * gV * Izbar))) = min(0.85,0.925((1+1.7*3.400*0.228*0.958)/(1+1.7*3.400*0.228))) = min(0.85, 0.903 ) = 0.850
Natural Frequency of Vessel (Operating) 44.628 Hz Natural Frequency of Vessel (Empty) 73.309 Hz Natural Frequency of Vessel (Test) 45.940 Hz Note: Per Section 1609 of IBC 2003/06/09 these results are also applicable for the determination of Wind Loads on structures (1609.1.1).
User Entered Importance Factor is 1.150 Force Coefficient [Cf] 0.507 Structure Height to Diameter ratio 1.419 Height to top of Structure 3305.500 mm This is classified as a rigid structure. Static analysis performed.
Sample Calculation for the First Element The ASCE code performs all calculations in Imperial Units only. The wind pressure is therefore computed in these units.
Value of [Alpha] and [Zg]:
Exposure Category: C from Table C6-2 Alpha = 9.500 : Zg = 274320.000 mm Effective Height [z]:
= Centroid Height + Vessel Base Elevation = 425.000 + 19663.998 = 20088.998 mm
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 162 Wind Load Calculation : Step: 8 11:08a Jan 30,2014 = 65.909 ft. Imperial Units Velocity Pressure coefficient evaluated at height z [Kz]:
Because z (65.909 ft.) > 15 ft.
= 2.01 * ( z / Zg ) ^(2 / Alpha) = 2.01 * ( 65.909/900.000 )^(2/9.500 ) = 1.159 Type of Hill: No Hill Wind Directionality Factor [Kd]:
= 0.95 per [6-6 ASCE-7 98][6-4 ASCE-7 02/05]
As there is No Hill Present: [Kzt]:
K1 = 0, K2 = 0, K3 = 0 Topographical Factor [Kzt]:
= ( 1 + K1 * K2 * K3 )² = ( 1 + 0.000 * 0.000 * 0.000 )²
= 1.0000 Velocity Pressure evaluated at height z, Imperial Units [qz]:
= 0.00256 * Kz * Kzt * Kd * I * Vr(mph)² = 0.00256 * 1.159 * 1.000 * 0.950 * 1.150 * 97.085² = 30.6 psf [1463.182 ] N/m² Force on the first element [F]:
= qz * G * Cf * WindArea = 30.560 * 0.850 * 0.507 * 27.097 = 356.8 lbs. [1587.2 ] N Element Hgt (z) K1 K2 K3 Kz Kzt qz mm N/m² --- SKIRT 20089.0 0.000 0.000 0.000 1.159 1.000 1463.182 BOTTOM HEAD 20539.0 0.000 0.000 0.000 1.165 1.000 1470.022 SHELL 21429.0 0.000 0.000 0.000 1.175 1.000 1483.208 TOP HEAD 22582.6 0.000 0.000 0.000 1.188 1.000 1499.673 Wind Vibration Calculations This evaluation is based on work by Kanti Mahajan and Ed Zorilla Nomenclature Cf - Correction factor for natural frequency D - Average internal diameter of vessel mm Df - Damping Factor < 0.75 Unstable, > 0.95 Stable Dr - Average internal diameter of top half of vessel mm f - Natural frequency of vibration (Hertz) f1 - Natural frequency of bare vessel based on a unit value of (D/L²)(10^(4)) L - Total height of structure mm
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 163 Wind Load Calculation : Step: 8 11:08a Jan 30,2014 Lc - Total length of conical section(s) of vessel mm tb - Uncorroded plate thickness at bottom of vessel mm V30 - Design Wind Speed provided by user m/sec Vc - Critical wind velocity m/sec Vw - Maximum wind speed at top of structure m/sec W - Total corroded weight of structure N Ws - Cor. vessel weight excl. weight of parts which do not effect stiff. N Z - Maximum amplitude of vibration at top of vessel mm Dl - Logarithmic decrement ( taken as 0.03 for Welded Structures ) Vp - Vib. Chance, <= 0.314E-05 (High); 0.314E-05 < 0.393E-05 (Probable) P30 - wind pressure 30 feet above the base Check other Conditions and Basic Assumptions:
#1 - Total Cone Length / Total Length < 0.5 0.000/2680.000 = 0.000
#2 - ( D / L² ) * 10^(4) < 8.0 (English Units) - ( 8.10/8.79² ) * 10^(4) = 1047.343 [Geometry Violation]
Compute the vibration possibility. If Vp > 0.393E-05 no chance. [Vp]:
= W / ( L * Dr²) = 192397/( 2680.00 * 2436.000² ) = 0.12098E-04
Since Vp is > 0.393E-05 no further vibration analysis is required ! Platform Load Calculations ID Wind Area Elevation Pressure Force Cf cm² mm N/m² N --- Wind Loads on Masses/Equipment/Piping ID Wind Area Elevation Pressure Force cm² mm N/m² N --- INT.PLATE 0.00 20564.00 1470.39 0.00 ANODES 0.00 21822.00 1488.82 0.00 The Natural Frequency for the Vessel (Ope...) is 44.6278 Hz.
Wind Load Calculation | | Wind | Wind | Wind | Wind | Element | From| To | Height | Diameter | Area | Pressure | Wind Load | | | mm | mm | cm² | N/m² | N | --- 10| 20| 20089.0 | 2961.60 | 25173.6 | 1463.18 | 1587.23 | 20| 30| 20539.0 | 2959.20 | 1479.60 | 1470.02 | 93.7269 |
30| 40| 21429.0 | 2961.72 | 51237.8 | 1483.21 | 3274.83 |
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 164 Wind Load Calculation : Step: 8 11:08a Jan 30,2014 40| 50| 22582.6 | 2959.20 | 16017.2 | 1499.67 | 1035.09 | PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2012
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 165 Earthquake Load Calculation : Step: 9 11:08a Jan 30,2014 Earthquake Loading Specified in G's Horizontal Acceleration factor (GX) 0.087 Horizontal Acceleration factor (GZ) 0.087 Vertical Acceleration factor (GY) 0.049
Note: +Y Direction G loads should also be run in the negative direction.
to insure maximum support loads are calculated.
The Natural Frequency for the Vessel (Ope...) is 44.6278 Hz.
Earthquake Load Calculation | | Earthquake | Earthquake | Element | Element | From| To | Height | Weight | Ope Load | Emp Load | | | mm | N | N | N | --- 10| 20| 425.000 | 13151.7 | 1618.14 | 1618.14 | 20| 30| 875.000 | 39150.6 | 4816.95 | 2270.89 | 30| 40| 1765.00 | 102413. | 12600.6 | 2919.97 | 40| 50| 2655.00 | 44477.6 | 5472.37 | 2926.31 | PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2012
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 166 Stress due to Combined Loads : Step: 15 11:08a Jan 30,2014 Stress Combination Load Cases for Vertical Vessels:
Load Case Definition Key IP = Longitudinal Stress due to Internal Pressure EP = Longitudinal Stress due to External Pressure HP = Longitudinal Stress due to Hydrotest Pressure NP = No Pressure EW = Longitudinal Stress due to Weight (No Liquid) OW = Longitudinal Stress due to Weight (Operating) HW = Longitudinal Stress due to Weight (Hydrotest) WI = Bending Stress due to Wind Moment (Operating) EQ = Bending Stress due to Earthquake Moment (Operating) EE = Bending Stress due to Earthquake Moment (Empty) HI = Bending Stress due to Wind Moment (Hydrotest) HE = Bending Stress due to Earthquake Moment (Hydrotest) WE = Bending Stress due to Wind Moment (Empty) (no CA)
WF = Bending Stress due to Wind Moment (Filled) (no CA) CW = Longitudinal Stress due to Weight (Empty) (no CA) VO = Bending Stress due to Vortex Shedding Loads ( Ope ) VE = Bending Stress due to Vortex Shedding Loads ( Emp ) VF = Bending Stress due to Vortex Shedding Loads ( Test No CA. ) FW = Axial Stress due to Vertical Forces for the Wind Case FS = Axial Stress due to Vertical Forces for the Seismic Case BW = Bending Stress due to Lat. Forces for the Wind Case, Corroded BS = Bending Stress due to Lat. Forces for the Seismic Case, Corroded BN = Bending Stress due to Lat. Forces for the Wind Case, UnCorroded BU = Bending Stress due to Lat. Forces for the Seismic Case, UnCorroded General Notes:
Case types HI and HE are in the Un-Corroded condition.
Case types WE, WF, and CW are in the Un-Corroded condition.
A blank stress and stress ratio indicates that the corresponding stress comprising those components that did not contribute to that type of stress.
An asterisk (*) in the final column denotes overstress.
Analysis of Load Case 1 : NP+HW+HI+HE From Tensile All. Tens. Comp. All. Comp. Tens. Comp.
Node Stress Stress Stress Stress Ratio Ratio 10 0.00 1980.72 0.00 1010.47 0.0000 0.0000 20 0.00 2829.60 0.00 1219.68 0.0000 0.0000 30 0.00 2829.60 0.00 1235.27 0.0000 0.0000 40 0.00 2829.60 0.00 1219.68 0.0000 0.0000 Analysis of Load Case 2 : HP+HW+HI+HE
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 167 Stress due to Combined Loads : Step: 15 11:08a Jan 30,2014 From Tensile All. Tens. Comp. All. Comp. Tens. Comp.
Node Stress Stress Stress Stress Ratio Ratio 10 0.00 1980.72 0.00 1010.47 0.0000 0.0000 20 854.89 2829.60 1219.68 0.3021 30 807.49 2829.60 1235.27 0.2854 40 854.89 2829.60 1219.68 0.3021 Analysis of Load Case 3 : IP+WF+CW From Tensile All. Tens. Comp. All. Comp. Tens. Comp.
Node Stress Stress Stress Stress Ratio Ratio 10 1158.36 -27.06 1010.47 0.0268 20 641.63 1654.80 1165.68 0.3877 30 600.66 1654.80 1186.02 0.3630 40 644.68 1654.80 1165.68 0.3896
Absolute Maximum of the all of the Stress Ratio's 0.3896 Governing Element: TOP HEAD Governing Load Case 3 : IP+WF+CW PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2012
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 168 Basering Calculations : Step: 17 11:08a Jan 30,2014
Skirt Data : Skirt Outside Diameter at Base SOD 2468.0000 mm Skirt Thickness STHK 9.5300 mm Skirt Internal Corrosion Allowance SCA 0.0000 mm Skirt External Corrosion Allowance 0.0000 mm Skirt Material SA-516 70 [Normalized]
Basering Input: Type of Geometry: Continuous Top Ring W/Gussets
Thickness of Basering TBA 28.5800 mm Design Temperature of the Basering 60.00 C Basering Matl SA-516 70 [Normalized]
(proposed to use SA 516 Gr.70N instead of SA 283 Gr.C due to unavailable stock)
Basering Operating All. Stress BASOPE 1378.96 bar Basering Yield Stress 2493.20 bar Inside Diameter of Basering DI 2238.0000 mm Outside Diameter of Basering DOU 2738.0000 mm Nominal Diameter of Bolts BND 38.1000 mm Bolt Corrosion Allowance BCA 0.0000 mm Bolt Material SA-325 Type1 Bolt Operating Allowable Stress SA 3100.02 bar
(Allowable stress is amended based on Tensile Strength-Input by TMJV) Number of Bolts RN 16 Diameter of Bolt Circle DC 2598.0000 mm Thickness of Gusset Plates TGA 15.8800 mm Width of Gussets at Top Plate TWDT 125.0000 mm Width of Gussets at Base Plate BWDT 125.0000 mm Gusset Plate Elastic Modulus E 20047900.0 N/cm² Gusset Plate Yield Stress SY 2493.2 bar Height of Gussets HG 221.4000 mm Distance between Gussets RG 76.0000 mm Dist. from Bolt Center to Gusset (Rg/2) CG 38.0000 mm Number of Gussets per bolt NG 2 Thickness of Top Plate or Ring TTA 31.7500 mm Radial Width of the Top Plate TOPWTH 125.0000 mm Anchor Bolt Hole Dia. in Top Plate BHOLE 43.0000 mm External Corrosion Allowance CA 0.0000 mm
Dead Weight of Vessel DW 79125.3 N Operating Weight of Vessel ROW 199193.3 N Earthquake Moment on Basering EQMOM 43131.9 N-m
Wind Moment on Basering WIMOM 9561.6 N-m (As clarified in CRS, calculation for combined stress shall refer to
sub-section “Stress due combined load”)
Percent Bolt Preload ppl 100.0 Use AISC A5.2 Increase in Fc and Bolt Stress No Use Allowable Weld Stress per AISC J2.5 No Factor for Increase of Allowables Fact 1.0000
Results for Basering Analysis : Analyze Option
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 169 Basering Calculations : Step: 17 11:08a Jan 30,2014 Basering Thickness Calculation method used : Simplified (Steel on Steel) Calculation of Load per Bolt [W/Bolt], W = TW M = Test Moment = (( 4 * M/DC ) - W ) / RN per Jawad & Farr, Eq. 12.3 = (( 4 * 0/2598.000 ) - 0 )/16 = 0.0000 N [** No Uplift ** ] Required Area for Each Bolt, Based on Max Load 0.0000 cm² Area Available in a Single Bolt (Corr) 8.3484 cm² Area Available in all the Bolts (Corr) 133.5739 cm² Bolt Stress Based on Simplified Analysis 0.0 bar Allowable Bolt Stress 3100.0 [Fact] 3100.02 bar
Concrete Contact Area of Base Ring CCA 19540.71 cm² Concrete Contact Section Modulus of Base Ring 0.1116E+10 mm ³ Concrete Load (Simplified method), Earthquake in Operating Condition [Sc]:
= ((ppl/100*(Abt*Sa)+W)/Cca) + M/CZ per Jawad & Farr Eq. 12.1 = (1.000 (133.5739 *3100 +208953 )/19540.71 ) + 43131/.11156E+10 = 22.65 bar Allowable Stress on Concrete 82.74 bar Determine Maximum Bending Width of Basering Section [Rw1,Rw2]:
Rw1 = (Dou - SkirtOD)/2, Rw2 = ( SkirtID - Di + 2*Sca )/2 Rw1 = (2738.000 -2468.000 )/2, Rw2 = (2448.940 -2238.000 + 2*0.000 )/2 Rw1 = 135.000 , Rw2 = 105.470 mm Calculation of required Basering Thickness, (Simplified) [Tb]:
Allowable Bending Stress 1.5 Basope = 2068.440 bar = Max(Rw1,Rw2) * ( 3 * Sc / S )½ + CA per Jawad & Farr Eq. 12.12 = Max(135.0000 ,105.4700 ) * ( 3 * 22.647/2068.440 )½ + 0.0000 = 24.4666 mm Basering Stress at given Thickness [Sb]
= 3 * Sc * ( Max[Rw1, Rw2]/(Tb - Ca) )² = 3 * 22.647 * ( Max[135.000 , 105.470 ]/(28.580 - 0.000 ) )² = 1515.888 , must be less than 2068.440 bar Required Thickness of Top Plate in Tension:
(Calculated as a fixed beam per Megyesy) Ft = (Sa*Abss), Bolt Allowable Stress * Area Rm = (Ft * 2 * Cg)/8, Bending Moment Sb Allowable Bending Stress Wt = (Topwth - Bnd), Width of Section T = ( 6 * Rm / ( Sb * Wt ))½ + CA T = ( 6 * 2459/( 2068 * 86.9000 ))½ + 0.0000 T = 28.6477 mm
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 170 Basering Calculations : Step: 17 11:08a Jan 30,2014 Required Thickness of Continuous Top Ring per Moss:
a = ( Dc-SkirtOD )/2 Skirt Distance to Bolt Circle P = Sa*Abss Bolt Allowable Stress * Area l = Avgwdt Average Gusset Width g1 = Gamma 1 Constant Term f( b/l ) g2 = Gamma 2 Constant Term f( b/l ) g = Flat distance / 2 Nut 1/2 Dimension (from Tema) Fb = Allowable Bending Stress Mo = P/(4pi)[1.3(ln((2lsin(pia/l)/(pig)))+1]-[(0.7-g2)P/(4pi)] Moment Term Tc = ( 6 * Abs(Mo) / Fb )½ + CA Required Thickness Tc = ( 6 * 844/2068 )½ + 0.000 Tc = 31.0482 mm
Required Thickness of Gusset in Compression, per AISC E2-1:
1. Allowed Compression at Given Thickness:
Factor Kl/r Per E2-1 48.2959 Factor Cc Per E2-1 125.9861 Allowable Buckling Str. per E2-1 1280.93 bar Actual Buckling Str. at Given Thickness 651.89 bar Required Gusset thickness, + CA 9.7029 mm 2. Allowed Compression at Calculated Thickness:
Factor Kl/r Per E2-1 79.0423 Factor Cc Per E2-1 125.9861 Allowable Buckling Str. per E2-1 1070.25 bar Act. Buckling Str. at Calculated Thickness 1066.90 bar Summary of Basering Thickness Calculations:
Required Basering Thickness (simplified) 24.4666 mm Actual Basering Thickness as entered by user 28.5800 mm Required Top Ring/Plate Thickness as a Fixed Beam 28.6477 mm Required Thickness of Continuous Top Ring (Moss) 31.0482 mm Actual Top Ring Thickness as entered by user 31.7500 mm Required Gusset thickness, + CA 9.7029 mm Actual Gusset Thickness as entered by user 15.8800 mm Weld Size Calculations per Steel Plate Engineering Data - Vol. 2
Compute the Weld load at the Skirt/Base Junction [W]
= SkirtStress * ( SkirtThickness - CA ) = 27.064 * ( 9.530 - 0.000 ) = 25.79 N/mm Results for Computed Minimum Basering Weld Size [BWeld]
= W / [( 0.4 * Yield ) * 2 * 0.707]
= 25/[( 0.4 * 2493 ) * 2 * 0.707]
= 0.183 mm
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 171 Basering Calculations : Step: 17 11:08a Jan 30,2014 Results for Computed Minimum Gusset and Top Plate to Skirt Weld Size Vertical Plate Load [Wv]
= Bolt Load / ( Cmwth + 2 * ( Hg + Tta ) ) = 258786.6/( 107.760 + 2 * ( 221.400 + 31.750 ) ) = 421.435 N/mm Horizontal Plate Load [Wh]
= Bolt Load * e / ( Cmwth * (Hg+Tta) + 0.6667 * (Hg+Tta)² ) = 258786.6 * 65.000/(107.760 * (253.150 ) + 0.6667 * (253.150 )² ) = 240.291 N/mm Resultant Weld Load [Wr]
= ( Wv² + Wh²)½
= ( 421.44² + 240.29²)½ = 485.126 N/mm Results for Computed Min Gusset and Top Plate to Skirt Weld Size [GsWeld]
= Wr / [( 0.4 * Yield ) * 2 * 0.707]
= 485.13/[( 0.4 * 2493 ) * 2 * 0.707]
= 3.440 mm Results for Computed Minimum Gusset to Top Plate Weld Size Weld Load [Wv]
= Bolt Load / ( 2 * TopWth ) = 258786.6/( 2 * 125.000 ) = 1035.146 N/mm Weld Load [Wh]
= Bolt Load * e / ( 2 * Hgt * TopWth ) = 258786.6 * 65.00/( 2 * 253.150 * 125.000 ) = 265.789 N/mm Resultant Weld Load [Wr]
= ( Wv² + Wh²)½ = ( 1035.15² + 265.79²)½ = 1068.724 N/mm Results for Computed Min Gusset to Top Plate Weld Size [GtpWeld]
= Wr / [( 0.4 * Yield ) * 2 * 0.707]
= 1068.72/[( 0.4 * 2493 ) * 2 * 0.707]
= 7.579 mm Note: The calculated weld sizes need not exceed the component thickness framing into the weld. At the same time, the weld must meet a minimum size specification which is 3/16 in. (4.76 mm) or 1/4 in. (6.35 mm), depending on the component thickness.
Summary of Required Weld Sizes:
Required Basering to Skirt Double Fillet Weld Size 4.7625 mm Required Gusset to Skirt Double Fillet Weld Size 6.3500 mm Required Top Plate to Skirt Weld Size 7.5792 mm
FileName : S-6504ABCD-TEST CASE (LOAD CASE 1YEAR) REV --- Page 172 Basering Calculations : Step: 17 11:08a Jan 30,2014 Required Gusset to Top Plate Double Fillet Weld Size 7.5792 mm PV Elite is a trademark of Intergraph CADWorx & Analysis Solutions, Inc. 2012