PEER 2007 Seismic Design Competition Rules.pdf

Structure Repair Cost /
Initial Structural Cost
1
0.8
0.6
0.4
0.2
0
0 0.02 0.04 0.06 0.08
Peak Drift Ratio
max |(Δ Roof
- Δ Floor
)/H|
Figure 5-1: Loss function relating structural replacement cost to peak drift ratio.
5.3.b Loss Caused by Equipment Damage (EDP2)
The structure will house equipment with a total value of
$20,000,000 that is sensitive to structural acceleration. Damage to
this equipment will be related to the peak of the absolute value of
roof acceleration using a loss function that is a cumulative normal
probability density function with mean peak roof acceleration of
1.5 g, and standard deviation of 0.5 g. The loss function is plotted
in Figure 5-2.
Equipment Cost ( x$10 6 )
20
16
12
8
4
0
0 1 2 3
max |Roof Acceleration| (g)
Figure 5-2: Loss function relating equipment cost to peak roof acceleration.
Undergraduate Seismic Design Competition 24