Civil Engineering Reference
In-Depth Information
Design performance level
Fully
operational
Near
collapse
Functional
Life safety
Frequent
(50%-50 years)
Occasional
(20%-50 years)
Rare
(10%-50 years)
Ver y rare
(5%-50 years)
11.11
Recommended seismic performance objectives for buildings
(SEAOC, 1995).
importance of the recovery time
T
RE
in the assessment of the RPLs for
structures and communities (Uma
et al.
, 2006). A two-dimensional perfor-
mance domain consisting of performance levels
PL
(
i
,
j
), defi ned by the
combination of functionality (index
j
) and recovery time (index
i
) is pro-
posed. By accounting for the effect of the temporal dimension, a three-
dimensional performance matrix (Fig. 11.13) can be visualized as a set of
predefi ned joined performance domains ('masks') for different seismic
intensity levels
IM
and different RPLs.
11.4 Case studies
The entire framework described in this chapter has been implemented
in a software which uses a Google Earth graphical interface (Arcidiacono
et al.
, 2011). The software takes into account interdependencies
between the road and building networks. Two case studies are
considered:
the old medieval housing units of L'Aquila downtown;
Treasure Island in San Francisco Bay.
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