For the following performance function and values shown for the variables, determine the safety index (B) and probability of failure (Pt). Use the First Order Reliability Method (FORM) by applying the formulas below. Then use the standard normal table provided to find Pf. Z = f(w,x,y) = w³ x² + xy²-5 w² y Formulas: W X y Mean (u) 3 5 2 Std. dev. (a) 0.5 1 0.5 με = f(μw, μx, My) Oz² = (OZ/Ow) ² |μ (ow ²) + (@Z / Ox)² |μ (0x²) + (OZ / Oy)² |μ (Oy²) 2 B = μz / Oz Pf = 1-F (B)

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L
Hz =
5.
For the following performance function and values shown for the variables, determine the
safety index (B) and probability of failure (P). Use the First Order Reliability Method
(FORM) by applying the formulas below. Then use the standard normal table provided to
find Pf.
Z= f(w,x,y) = w³ x² + xy²-5 w²y
Formulas:
µz = f(µw, µx, Hy)
Oz
||
mial formula to find the probabili
W
B=
X
y
Mean (u)
3
2=
Oz (OZ / Ow) 2 |μ (ow ²) + (OZ / Ox)² μ (ox ²) + (OZ / Oy)² μ (oy ²)
B = μz / Oz
Pf = 1 - F (B)
5
2
Std. dev. (o)
0.5
1
0.5
Pf=
Enter
Transcribed Image Text:L Hz = 5. For the following performance function and values shown for the variables, determine the safety index (B) and probability of failure (P). Use the First Order Reliability Method (FORM) by applying the formulas below. Then use the standard normal table provided to find Pf. Z= f(w,x,y) = w³ x² + xy²-5 w²y Formulas: µz = f(µw, µx, Hy) Oz || mial formula to find the probabili W B= X y Mean (u) 3 2= Oz (OZ / Ow) 2 |μ (ow ²) + (OZ / Ox)² μ (ox ²) + (OZ / Oy)² μ (oy ²) B = μz / Oz Pf = 1 - F (B) 5 2 Std. dev. (o) 0.5 1 0.5 Pf= Enter
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