Part 11 - Spectral Wind Fatigue

Part 11 - Spectral Wind Fatigue Preparation 1) Under “Training Project”, create “Spectral Wind Fatigue” subdirectory 2) Under “Spectral Wind Fatigue”, Create “Foundation SE”, “Modes” and “Wind Fatigue” subdirectories. 3) Copy SACINP.STA model file, SEAINP.STA and PSIINP.DAT soil data from “\Spectral Earthquake\Static SE” directory to “Foundation SE” directory. Creating foundation superelement under “Foundation SE” directory, 1) Modifying Seastate file SEAINP.STA Delete EQKS from LCSEL and load combinations. Rename load case GRVX to X000: delete ACCEL line and modifying INCWGT to include only ANOD and WKWY for possible wind loads. Add 000 direction wind at 15.0 m/sec @ 10 m, using AP08 for wind profile. Rename load case GRVY to Y090: delete ACCEL line and modifying INCWGT to include only ANOD and WKWY for possible wind loads. Add 090 direction wind at 15.0 m/sec @ 10 m, using AP08 for wind profile. In load combinations using X000 to replace GRVX and Y090 to replace GRVY. Portion of modified Seastate input shall looks like following, ------------------------------------------------------------------------------------------------------------LDOPT NF+Z 1.025 LCSEL SUPX SUPY … LOAD LOADCNDEAD INCWGT ANODWKWY DEAD DEAD -Z LOADCNMASS INCWGT MASS ACCEL LOADCNX000 INCWGT ANODWKWY WIND WIND 15.0 10.0 LOADCNY090 INCWGT ANODWKWY WIND WIND 15.0 10.0 LCOMB LCOMB SUPX DEAD 1.0MASS LCOMB SUPY DEAD 1.0MASS END

7.85

-79.50

79.50

MN

NPNP

K

M

1.0

N CEN1

0.00

AP08

90.00

AP08

1.0X000 1.0Y090

1.0 1.0

-------------------------------------------------------------------------------------------------------------

Spectral Wind Fatigue - 1

2) Creating run file to generate foundation superelement using SUPX and SUPY. In “Analyis Options” > “Foundation” part, select “Create foundation superelement” and input SUPX and SUPY to 1st X and 1st Y load cases respectively, “Max load and deflections” will be used for pile head load/deflection option. No “Element Check” and “Postvue” database needed for this analysis. Run analysis. Mode extraction under “Modes” directory,

1) Copy Seastate SEAINP.DYN file from “\Spectral Earthquake\Modes” directory to “Modes” directory. 2) Create Dynapac run file “Extract Mode Shapes” Under “Analysis Options” > “Super Element”, select “Import Superelement” and browse in “Foundation SE” directory for DYNSEF.STA file. Under “Analysis Options” > “Mode Shape”, choose “Use Modal Extraction Options”; input 50 to “Number of Modes” and select “Create added mass of beams”. Choose “Seastate” options and create “Postvue” database. Browse in “Foundation SE” directory for SACINP.STA when prompted for “Model Data file”. Run Analysis. Spectral Wind Fatigue analysis under “Wind Fatigue” directory, 1) Create Seastate SEAINP.WND to define wind load cases Copy SEAINP.DYN from “Modes” to “Wind Fatigue” directory and rename to SEAINP.WND. Totally 27 load cases from 9 wind speeds will be added in 000, 045 and 090 directions. The wind speeds are 7.50, 15.00, 22.50, 30.00, 37.50, 45.00, 52.50, 60.00, 67.50 m/sec @ 10m, AP08 will be used for wind profile.

Spectral Wind Fatigue - 2

Each wind load case will include an INCWGT line to select weight groups of ANOD and WKWY for possible wind loading. Dynamic spectral wind analysis option “WIN” on load options line will be defined at col. 5658. Portion of modified Seastate input shall looks like following, ------------------------------------------------------------------------------------------------------------LDOPT … LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND LOADCN INCWGT WIND WIND … … END

NF+Z

1.025

7.85

-79.50

79.50

7.50 2 ANODWKWY

10.00

0.00

AP08

15.00 3 ANODWKWY

10.00

0.00

AP08

22.50 4 ANODWKWY

10.00

0.00

AP08

30.00 5 ANODWKWY

10.00

0.00

AP08

37.50 6 ANODWKWY

10.00

0.00

AP08

45.00 7 ANODWKWY

10.00

0.00

AP08

52.50 8 ANODWKWY

10.00

0.00

AP08

60.00 9 ANODWKWY

10.00

0.00

AP08

67.50

10.00

0.00

AP08

MN WIN

NPNP

K

1 ANODWKWY

------------------------------------------------------------------------------------------------------------2) Create dynamic response input file DYRINP.WND for this spectral wind fatigue analysis “Wind Spectral Analysis” will be selected on dynamic response options for 50 modes. Structural damping 2%.

Spectral Wind Fatigue - 3

A spectral wind line SPCWIN will be defined to select “Fatigue analysis”, “Plot Gen. Force Spectrum” and “Plot Response Spectrum”; “Spacial correlation coefficient option” will be calculated for 10 min. wind averaging time. Fatigue options defined here for spectral wind fatigue analysis. Design life = 20.0 with Life safety factor = 2.0 All plates and non-tubular elements may be skipped; API X curve with thickness correction selected as S-N curve; Efthymiou method EFT will be used for SCF calculation; Max and Min SCF will be prescribed For fatigue option 2 line, check “Member Summ. Rep. (Life Order)” and “SCF Validity Range Check”. Using joint selection line to define only joints 201L, 203L, 205L, 207L, 301L, 303L, 305L, 307L, 401L, 403L, 405L and 407L will be included for fatigue damage evaluations. Using SCF limits line SCFLM to define max. SCF = 6.0 and min. SCF = 1.5 Three Wind Direction Spectrums will be added corresponding to SEAINP.WND for 000, 045 and 090, the direction occurrence is 25%, 50% and 25% correspondingly. Weibull K Parameter = 2.0 and Weibull A Parameter =32.0. Wave response input for spectral wind fatigue shall looks like following, ------------------------------------------------------------------------------------------------------------DROPT WIND 50EC+Z-79.50 SDAMP 2.0 LOAD SPCWIN FT MN PL PL CA 600.0 FTOPT 20.0 2.0 SMAXX SKMXMNSK FTOPT2 PTVC JSLC 201L203L205L207L301L303L305L307L401L403L405L407L SCFLM 6.0 1.5 WINSPC 0.00 0.25 WEI 2.0 32.0 WINSPC 45.00 0.50 WEI 2.0 32.0 WINSPC 90.00 0.25 WEI 2.0 32.0 END

EFT

------------------------------------------------------------------------------------------------------------3) Run spectral wind analysis Browse in “Modes” directory for mode and mass file, browse in “Foundation SE” directory for model data file. Run analysis and browse for results.

Spectral Wind Fatigue - 4

Portion of spectral wind fatigue analysis report for joint 407L and 403L: ----------------------------------------------------------------------------------------------------------------------------------*

JOINT

MEMBER GRUP TYPE ID ID

*

*

ORIGINAL OD WT (CM) (CM)

M E M B E R

JNT MEM TYP TYP

F A T I G U E (DAMAGE ORDER)

R E P O R T

*

*

CHORD LEN. (M )

GAP * STRESS CONC. FACTORS * (CM) AX-CR AX-SD IN-PL OU-PL 0.00

407L 403L-407L H41

TUB

32.38

1.250 Y

BRC

12.12

407L 407L-507L LG4

TUB

107.00

3.500 Y

CHD

12.12

407L 405L-407L H41

TUB

32.38

1.250 Y

BRC

12.12

407L 407L-507L LG4

TUB

107.00

3.500 Y

CHD

12.12

407L 407L-4000 H42

TUB

32.38

1.250 Y

BRC

12.12

407L 407L-507L LG4

TUB

107.00

3.500 Y

CHD

12.12

0.00

0.00

*

FATIGUE RESULTS DAMAGE LOC SVC LIFE

3.00

6.00

2.35

3.53

464.9011

BL

.0430199

2.53

4.74

1.59

2.74

123.9820

BL

.1613137

3.00

6.00

2.35

3.53

38.81007

BR

.5153302

2.53

4.74

1.59

2.74

10.11457

BR

1.977346

3.00

6.00

2.35

3.51

10.51913

BR

1.901298

2.53

4.71

1.58

2.72

2.487760

BR

8.039362

REQUIRED OD WT (CM) (CM)

---------------------------------------------------------------------------------------------------------------------------------403L 307L-403L D03

TUB

40.75

1.500 K

BRC

12.12

403L 303L-403L LG3

TUB

107.00

3.500 K

CHD

12.12

403L 401L-403L H41

TUB

32.38

1.250 Y

BRC

12.12

403L 403L-503L LG4

TUB

107.00

3.500 Y

CHD

12.12

403L 403L-407L H41

TUB

32.38

1.250 K

BRC

12.12

403L 403L-503L LG4

TUB

107.00

3.500 K

CHD

12.12

403L 403L-4000 H42

TUB

32.38

1.250 Y

BRC

12.12

30.96

0.00

30.96

0.00

2.50

2.50

2.78

2.31

28.75114

TL

.6956246

2.69

2.69

1.50

2.06

22.56733

TL

.8862370

3.00

6.00

2.35

3.53

48.60317

BL

.4114958

2.53

4.74

1.59

2.74

12.83294

BL

1.558490

4.66

4.66

2.35

3.60

450.1331

TL

.0444313

3.94

3.94

1.59

2.79

128.6755

TL

.1554298

3.00

6.00

2.35

3.51

2.727114

BL

7.333759

403L 403L-503L LG4 TUB 107.00 3.500 Y CHD 12.12 2.53 4.71 1.58 2.72 .5422007 BL 36.88671 -------------------------------------------------------------------------------------------------------------------------------------

Spectral Wind Fatigue - 5