Seismic risk assessment of interdependent critical infrastructure systems: The case of European gas and electricity networks

2011 ◽  
Vol 41 (1) ◽  
pp. 61-79 ◽  
Author(s):  
Karmen Poljanšek ◽  
Flavio Bono ◽  
Eugenio Gutiérrez
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Critical Infrastructure ◽  
Seismic Risk Assessment ◽  
Infrastructure Systems ◽  
Electricity Networks ◽  
Critical Infrastructure Systems

scholarly journals Seismic Risk of Infrastructure Systems with Treatment of and Sensitivity to Epistemic Uncertainty

2020 ◽  
Vol 5 (11) ◽  
pp. 103
Author(s):  
Francesco Cavalieri ◽  
Paolo Franchin
Keyword(s):  
Risk Assessment ◽  
Seismic Hazard ◽  
Seismic Risk ◽  
Critical Infrastructure ◽  
Epistemic Uncertainty ◽  
Logic Tree ◽  
Seismic Risk Assessment ◽  
Infrastructure Systems ◽  
Gas Network ◽  
Assessment Problems

Modern society’s very existence is tied to the proper and reliable functioning of its Critical Infrastructure (CI) systems. In the seismic risk assessment of an infrastructure, taking into account all the relevant uncertainties affecting the problem is crucial. While both aleatory and epistemic uncertainties affect the estimate of seismic risk to an infrastructure and should be considered, the focus herein is on the latter. After providing an up-to-date literature review about the treatment of and sensitivity to epistemic uncertainty, this paper presents a comprehensive framework for seismic risk assessment of interdependent spatially distributed infrastructure systems that accounts for both aleatory and epistemic uncertainties and provides confidence in the estimate, as well as sensitivity of uncertainty in the output to the components of epistemic uncertainty in the input. The logic tree approach is used for the treatment of epistemic uncertainty and for the sensitivity analysis, whose results are presented through tornado diagrams. Sensitivity is also evaluated by elaborating the logic tree results through weighted ANOVA. The formulation is general and can be applied to risk assessment problems involving not only infrastructural but also structural systems. The presented methodology was implemented into an open-source software, OOFIMS, and applied to a synthetic city composed of buildings and a gas network and subjected to seismic hazard. The gas system’s performance is assessed through a flow-based analysis. The seismic hazard, the vulnerability assessment and the evaluation of the gas system’s operational state are addressed with a simulation-based approach. The presence of two systems (buildings and gas network) proves the capability to handle system interdependencies and highlights that uncertainty in models/parameters related to one system can affect uncertainty in the output related to dependent systems.

SEISMIC RISK ASSESSMENT AND REDUCTION IN ITALY

2019 ◽  
Vol 1 (Special Issue on First SACEE'19) ◽  
pp. 55-75
Author(s):  
Fabio Sabetta
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Safety Assessment ◽  
Public Funding ◽  
Tax Incentives ◽  
Technical Training ◽  
Disaster Prevention ◽  
Existing Buildings ◽  
Seismic Risk Assessment ◽  
Post Disaster

In this paper, the main features of the policies adopted in Italy for seismic risk reduction are discussed. Particular attention is given to the Pre-disaster prevention activities such as the implementation of the building code, the seismic risk assessment for a priority scale of intervention, tax incentives and public funding for the vulnerability reduction of the existing buildings, information to population and school education, technical training of experts. The phases of response and post-disaster activities, including emergency management, search and rescue, loss scenarios, and safety assessment of buildings, are also discussed taking example from the most recent devastating earthquakes in Italy (L.Aquila 2009, Amatrice 2016).

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