APPENDIX B
CONTOUR PLOTS OF THREE DESIGN RESPONSE SURFACE
APPROXIMATIONS AND TEST POINTTS ALONG THE CURVE OF TARGET
RELIABILITY
To compare critical errors of the design response surface approximations, 11 test
points were selected along a curve of target reliability (probability of failure=0.0013 5) for
each design response surface approximation. The contour plots and test points employed
in error calculation for the probabilistic sufficiency factor, probability of failure and
safety index response surface approximations are shown by the following figures. The
average percentage errors at these test points are shown in Table 6-4.
5- *.
15 2 25 3
w (Inch)
Figure B-1. Contour plot of probabilistic safety factor design response surface
approximation and test points along the curve of target reliability