Quantifying resilience and risk and incorporating hazard models into transport asset management
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A paper published in the Structure and Infrastructure Engineering in September 2023 by researchers from the University of Auckland in New Zealand and Universities in Chile – Pontificia Universidad Catolica de Chile, and Universidad de Concepcion, presented the main approaches to quantify resilience and risk and how they incorporate hazard models into transportation asset management.
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The review included literature that recognises the need for integrating resilience and risk into transportation asset management (TAM), proposes metrics to aid decision-making in TAM, or presents methods to incorporate them into TAM. The authors observed that the need to integrate resilience and risk into transportation asset management has steadily grown, and so have the papers covering the subject.
The integration of resilience and risk into TAM has been studied from various perspectives and contexts, but for this paper, the authors have categorised their findings into four major groups:
First, the integration requirements and policy guidelines describe the legislative requirements adopted by different countries and departments of transportation and also present a series of policy guidelines and recommendations to reduce the effects of natural hazards on transportation infrastructure. Second, consequence modelling presents a series of models used in TAM to quantify damage and losses; Third, resilience metrics explore the most frequent approaches for transportation resilience assessment linked to TAM; and Fourth, integration methods explore the different integration methods proposed in the literature.
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TAM has traditionally focused on evaluating asset performance over time based on their exposure to heavy vehicle loading and routine weather events, neglecting the effects of natural hazards in the analysis. For example, pavement deterioration studied for decades can confidently estimate an asset’s life cycle performance. However, the long-term effects of natural hazards can also contribute to the decline of the asset, reducing its useful life.
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