Resilience-based design (RBD) modelling of civil infrastructure to assess seismic hazards - Seismic Risk Analysis and Management of Civil Infrastructure Systems - page 264

11
Resilience-based design (RBD) modelling of
civil infrastructure to assess seismic hazards
G. P. CIMELLARO, Politecnico di Torino, Italy
DOI : 10.1533/9780857098986.2.268
Abstract : The chapter addresses a new design methodology for civil
engineering structures called 'resilience-based design (RBD)', which can
be considered as the next generation of performance-based design
(PBD). Currently, engineers approach a structure as if it stands alone,
without considering the interaction with the community. However,
instead it should be considered as an integrated part of the design
process. Indeed, the building should not be considered alone, but as a
group of buildings using the 'portfolio approach' which would allow
regional loss analysis. The goal of RBD is to make communities as
'resilient' as possible, developing technologies and actions that allows
each structure and/or community to regain its function as promptly as
possible. The fundamental concepts of community resilience are analysed
and a common reference framework based on the acronyms called
'PEOPLES' is established. Emphasis is given to hazard intensity
measures, engineering demand parameters, while a new performance
matrix is proposed to defi ne the performance limit thresholds for RBD.
Some applications are presented incorporating both performance and
resilience objectives in order to illustrate the feasibility of the proposed
method.
Key words : resilience, resilience-based design (RBD), performance-based
design (PBD), reliability, limit thresholds, community.
11.1 Introduction
Past earthquakes such as San Fernando (1971) (Jennings, 1971), Loma
Prieta (1989) (Benuska, 1990), Northridge (1994) (Hall et al. , 1996) and
Kobe (1995) (Comartin et al. , 1995) are often remembered for particular
structural problems, because the scientifi c community mainly focuses its
attention on these aspects, while recent earthquakes draw the attention of
the researchers mainly to the effects on communities (2004 Indian Ocean
Tsunami (Iwan, 2006), 2008 Wenchuan (Lin et al. , 2008), 2010 Haiti (Des-
Roches, 2011), 2011 Christchurch (Deam et al. , 2011), and 2011 Tohoku
earthquake (Takewaki, 2011)) rather than structures. Natural disasters in
general can cause widespread moderate to severe damage that may dimin-
ish the ability of a community to respond. Community in this chapter is
defi ned as a social unit larger than a household that shares common values
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