Seismic risk analysis using Bayesian belief networks - Seismic Risk Analysis and Management of Civil Infrastructure Systems - page 190

100

80

VL

60

L
M
H

40

VH

20

0

7.10 Earthquake disaster risk index (EDRI) values for 11 Canadian
cities.

1

BBN WAM

0.8

0.6

0.4

0.2

0

7.11 Comparison of WAM and BBN normalized earthquake disaster
risk index (EDRI) values for 11 Canadian cities.

EDRI value, though it had a relatively low hazard. As discussed before, this
anomaly is due to equal weights (importance) assigned to the fi ve param-
eters of hazard and consequence of failure, linear aggregation of WAM, and
nature of the hierarchical structure. On the other hand, the BBN model
provides more realistic and intuitive evaluations of relative risks, and the
proposed new hierarchical structure have improved these shortcomings.