I am currently having force and wind load for my model. The total load cases are as below :


CASE 1 (HYD) WW+HP
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 2 (OPE) W+T1+P1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 3 (OPE) W+T1+P1+F1
OPERATING CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 4 (OPE) W+T1+P1+WIN1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 5 (OPE) W+T1+P1+WIN2
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 6 (OPE) W+T1+P1+WIN3
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 7 (OPE) W+T1+P1+WIN4
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 8 (SUS) W+P1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 9 (EXP) L9=L2-L8
SUSTAINED CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None

CASE 10 (OCC) L10=L3-L2
EXPANSION CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None

CASE 11 (OCC) L11=L4-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 12 (OCC) L12=L5-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 13 (OCC) L13=L6-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 14 (OCC) L14=L7-L2
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 15 (OCC) L15=L8+L10
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 16 (OCC) L16=L8+L11
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 17 (OCC) L17=L8+L12
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 18 (OCC) L18=L8+L13
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 19 (OCC) L19=L8+L14
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None

I am focusing on CASE 15 which the stress checked FAILED as below :




CASE 15 (OCC) L15=L8+L10


Piping Code: B31.3 = B31.3 -2006, May 31, 2007


CODE STRESS CHECK FAILED : LOADCASE 15 (OCC) L15=L8+L10

Highest Stresses: (N./sq.mm. ) LOADCASE 15 (OCC) L15=L8+L10
CodeStress Ratio (%): 242.0 @Node 740
Code Stress: 323.5 Allowable: 133.7
Axial Stress: 41.3 @Node 370
Bending Stress: 289.2 @Node 740
Torsion Stress: 32.0 @Node 740
Hoop Stress: 85.1 @Node 370
3D Max Intensity: 365.9 @Node 740

And for the same model. I deleted all the wind loads and left only the force, as below :

CASE 1 (HYD) WW+HP
HYDRO TEST CASE
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 2 (OPE) W+P1+F1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 3 (OPE) W+T1+P1
OPERATING CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 4 (SUS) W+P1
SUSTAINED CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Elastic Modulus: EC
Friction Mult.: 1.0000
Flg Analysis Temp: None

CASE 5 (EXP) L5=L3-L4
EXPANSION CASE CONDITION 1
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
Flg Analysis Temp: None

CASE 6 (OCC) L6=L2-L4
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: ALG
OCC Load Factor: 0.0000
Flg Analysis Temp: None

CASE 7 (OCC) L7=L4+L6
Keep/Discard: Keep
Display: Disp/Force/Stress
Combination Method: SCALAR
OCC Load Factor: 0.0000
Flg Analysis Temp: None
CAESAR II LOAD CASE REPORT




While it shows the result CASE 7 as stress PASSED, as below :

CASE 7 (OCC) L7=L4+L6


Piping Code: B31.3 = B31.3 -2006, May 31, 2007


CODE STRESS CHECK PASSED : LOADCASE 7 (OCC) L7=L4+L6

Highest Stresses: (N./sq.mm. ) LOADCASE 7 (OCC) L7=L4+L6
CodeStress Ratio (%): 66.9 @Node 740
Code Stress: 89.4 Allowable: 133.7
Axial Stress: 41.2 @Node 370
Bending Stress: 111.4 @Node 799
Torsion Stress: 7.8 @Node 740
Hoop Stress: 85.1 @Node 370
3D Max Intensity: 126.9 @Node 740



3D Max Intensity: 126.9 @Node 740

Could you please explain on this ?

I have also sent you the CAESAR II file via email.

Thank you very much