Dysfunctionality Hazard Curve: Risk-Based Tool to Support the Resilient Design of Systems Subjected to Multihazards
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
While resilience metrics have been proposed and studied given a functionality recovery curve, they have not emphasized enough on accounting for the uncertainties in the multihazard occurrences and intensities. Moreover, these resilience metrics are not risk-based (i.e., they do not express the system's resilience loss as a frequency of exceedance), leading to inconsistencies in system performance description when compared to performance-based engineering frameworks. A risk-based tool termed dysfunctionality hazard curve is proposed to assess the resilience of systems subjected to single hazards or multihazards with inter-event dependencies. Dysfunctionality hazard curve expresses system resilience performance as frequency of exceedance of time to full functionality. In doing so, it characterizes system recovery as a sequence of repair activities and also considers the uncertainties in the multihazard occurrences and intensities. Dysfunctionality hazard curve is demonstrated for a residential building susceptible to earthquake and hurricane hazards. Results indicate that Dysfunctionality hazard curve for earthquakes is greater than that for hurricane winds under single hazards. Under multihazards, considering inter-event dependencies during system recovery leads to larger dysfunctionality hazard curve than ignoring them. Finally, the concept of dysfunctionality hazard curve is also extended to a system-of-systems consisting of residential and commercial buildings.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOE Office of Environment, Health, Safety and Security (AU)
- Grant/Contract Number:
- AC07-05ID14517
- OSTI ID:
- 1778256
- Report Number(s):
- INL/JOU--20-59418-Rev000
- Journal Information:
- ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Journal Name: ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Journal Issue: 2 Vol. 7; ISSN 2376-7642
- Publisher:
- American Society of Civil Engineers (ASCE)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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