Abstract
Civil structures and infrastructures are often subjected by design to the impacts of natural and human-caused hazardous events, and accordingly may suffer from damages, functionality loss, and failure. In order to quantitatively measure the associated likelihood and consequences for quantifying risks, an appropriate measure of structural reliability and resilience is essentially required. This paper presents an explicit measure for the time-dependent resilience of repairable structures as a natural extension of time-invariant and time-dependent structural reliability concepts, taking into account the effects of structural performance deterioration and nonstationary external loads. First, the resilience measure associated with a single load event is discussed, and an integral-free expression is developed for a special case of structural robustness and recovery. Subsequently, the resilience measure for a planning horizon, which is a function of the duration of considered service period, is proposed in a closed form. Remarkably, the time-dependent resilience can be treated as a generalized form of the time-dependent reliability. Motivated by this, the resilience-based design and cost optimization of structures are also discussed. A numerical example is presented to demonstrate the accuracy and applicability of the proposed resilience measure.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research described in this paper was supported by the Vice-Chancellor’s Postdoctoral Research Fellowship from the University of Wollongong. This support is gratefully acknowledged. The authors would like to acknowledge the thoughtful suggestions of three anonymous reviewers, which substantially improved the present paper.
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© 2022 American Society of Civil Engineers.
History
Received: Aug 17, 2021
Accepted: Mar 3, 2022
Published online: Apr 23, 2022
Published in print: Sep 1, 2022
Discussion open until: Sep 23, 2022
ASCE Technical Topics:
- Analysis (by type)
- Construction engineering
- Construction methods
- Design (by type)
- Deterioration
- Engineering fundamentals
- Failure analysis
- Infrastructure
- Infrastructure resilience
- Load factors
- Materials characterization
- Materials engineering
- Measurement (by type)
- Rehabilitation
- Structural analysis
- Structural design
- Structural engineering
- Structural reliability
- Time dependence
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