Abstract
The seismic retrofitting of essential facilities is a typical problem of public administrations. Due to the large amount of existing and/or historic buildings with a high seismic vulnerability and the limited economic resources, it is necessary to provide efficient solutions for the structural reinforcement of these structures on a national, regional, and urban level. This paper proposes an innovative and multidisciplinary framework to choose massive interventions on a large territorial scale according to the potential benefits of the intervention in terms of reduction in expected economic losses associated with retrofitting intervention and other important aspects usually neglected in intervention strategies. The proposed framework is based on Multi-Criteria Decision-Making (MCDM) analysis. It is applied to a very complex urban area: the case study is the school buildings stock (4458 buildings) in the Lima Metropolitan area, Peru. The goal of the study is arisk analysis aimed at selecting the optimal retrofitting strategy in a huge urban area. The results of this work can be considered the base for decision-makers. They could use them as a decision support tool in the seismic risk mitigation on a large territorial scale.
Highlights
Essential facilities have a strategic role in ordinary conditions, and their role is even more important and critical during a disaster
The effects of different retrofitting strategies of essential facilities are studied and compared, and a new framework is suggested to select optimal intervention options on a large territorial scale. It is based on the use of seismic risk analysis and the application of Multi-Criteria Decision-Making (MCDM) methods
The selection of the optimal intervention is defined through a multidisciplinary and transparent decision-making process aimed at providing efficient solutions among the compared interventions
Summary
Essential facilities (schools, hospitals, etc.) have a strategic role in ordinary conditions, and their role is even more important and critical during a disaster. The continued use of essential facilities is crucial for the functionality of urban systems. The need to enhance their seismic capacity with suitable retrofitting interventions has been highlighted. These interventions should ensure the continual operation of buildings and cannot be based only on engineering parameters such as building seismic capacity, seismic intensity demand, and/or their ratio. Optimal retrofitting interventions should be performed taking into account engineering, social, and economic aspects that are often neglected, such as probabilistic risk analysis, public safety, environmental impact, socio-economic loss assessment, and sustainability, as well as the social and natural environment [5]
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