Scenario-based Resilience Assessment of Communities with Interdependent Civil Infrastructure Systems
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Date
2021
Publication Type
Conference Paper
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yes
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Abstract
Civil infrastructure systems (CISs) supply the communities with essential resources and services, such as electric power, potable water, telecommunication and transportation. Extreme events, such as earthquakes, can cause disruptions to these systems resulting in significant direct and indirect financial and societal losses. Increasing disaster resilience of CISs reduces the negative effects of such events on communities. However, in order to improve CIS and community disaster resilience, it first it needs to be quantified, so that various strategies for resilience improvement can be devised and evaluated. This paper presents a model for quantifying the seismic resilience of communities with interdependent civil infrastructure systems. The model comprises four modules: the hazard module, the vulnerability module, the functional recovery module and the resilience quantification module. The hazard module is used to assess the intensity measures of a considered scenario earthquake at the geographic locations of CIS components. Ground motion prediction equations, and transient and permanent ground deformation models are used to estimate the peak ground acceleration, peak ground velocity and peak ground deformation, respectively. The vulnerability module links these measures to component damage states using seismic vulnerability curves. Due to the suffered damage, functionality of the components decreases. Additionally, certain components rely on the resources and services provided by other CISs. For example, a water pump needs electric power to operate. Such interdependencies between CISs are explicitly modeled using an iterative flow-based approach as they can cause further decreases of component functionality through feedback loops and cascading effects. The functional recovery module simulates the component repair process and restoration of component and system functionality using pre-assigned repair rates. Finally, the Re-CoDeS method is used to compute the unmet demand for a CISs service over time and thereby quantify the resilience (or lack thereof) of the considered CISs. In this paper, a virtual community served by three interdependent CISs is exposed to a scenario earthquake. The presented model is then used to quantify the seismic resilience of this system of systems and evaluate the effects of CIS interdependency.
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published
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Book title
Proceedings of the Seventeenth World Conference on Earthquake Engineering Japan 2021
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Pages / Article No.
Publisher
National Information Center of Earthquake Engineering
Event
17th World Conference on Earthquake Engineering (17WCEE 2020-21)
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Software
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Subject
Vulnerability functions; Recovery; Interdependency; Resilience; Civil infrastructure systems
Organisational unit
03930 - Stojadinovic, Bozidar / Stojadinovic, Bozidar
Notes
Conference lecture held at poster session on September 29, 2021. Conference postponed due to Corona virus (COVID-19), and rescheduled from September 13–18, 2020 to September 27 – October 2, 2021