Assessment of Multi-Criteria Evaluation Procedures for Identification of Optimal Seismic Retrofitting Strategies for Existing RC Buildings

Gallo, Wilson Wladimir Carofilis; Gabbianelli, Giammaria; Monteiro, Ricardo

doi:10.1080/13632469.2021.1878074

Cited by 18 publications

(5 citation statements)

References 47 publications

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“…employing a fragility function for the RM typology adjusted to the local construction practices). Finally, while the benefits of building code enforcement and seismic retrofitting plans have been discussed in this article without a proper analysis of costs, various methods such as cost–benefit evaluations (Giordano et al, 2021; Liel and Deierlein, 2013; Yi et al, 2020; Zanini et al, 2019), or multi-criteria decision-making (Gallo et al, 2022; Gentile and Galasso, 2021), can help in selecting optimal solutions.…”

Section: Discussionmentioning

confidence: 99%

Quantifying the potential benefits of risk-mitigation strategies on present and future seismic losses in Kathmandu Valley, Nepal

et al. 2023

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Structural risk-mitigation measures have been shown to significantly reduce earthquake-induced physical damage and casualties in various regions worldwide. However, these benefits remain unknown or inadequately quantified for potential future events in some hazard-prone areas such as Kathmandu Valley, Nepal, which this article addresses. The analysis involves modeling an earthquake scenario similar to the 2015 Gorkha earthquake (moment magnitude 7.8) and using four exposure inventories representing the current (2021) urban system or near-future (2031) development trajectories that Kathmandu Valley could experience. The results predict substantial losses (€8.2 billion in repair/reconstruction costs and 89,199 fatalities) in 2021 if the building stock’s quality is assumed to have remained the same as in 2011 (Scenario A). However, a partial improvement of the building stock’s quality in the present (Scenario B) can decrease financial losses and fatalities by 17% and 44%, respectively. Moreover, under a “no change” pathway for 2031 (Scenario C), where the quality of the expanding building stock remains the same as in 2011, and the number of buildings is larger to reflect population growth, financial losses and fatalities will increase by 20% and 25% respectively over those of Scenario A. In contrast, further upgrades to the building stock’s quality by 2031 (Scenario D) would reduce financial and human losses by 14% and 54% respectively, relative to those of Scenario A. In addition, the largest financial and human losses computed in the four scenarios are consistently associated with the low- and middle-income population. The main findings of this article can be used to inform decision makers about the benefits of investing in forward-looking seismic risk-mitigation efforts.

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Section: Discussionmentioning

confidence: 99%

Quantifying the potential benefits of risk-mitigation strategies on present and future seismic losses in Kathmandu Valley, Nepal

et al. 2023

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“…One of the most appealing frameworks for the identification of optimal combined seismic and energy efficiency retrofitting interventions is based on an MCDM approach, which considers the performance of different retrofit alternatives across a broad range of decision variables (DVs) and uses a weighted average method to identify the optimal solution. This methodology, employed in the present study, has been described extensively by Caterino et al [6] and Carofilis et al [5].…”

Section: Multi Criteria Decision Making Methodologymentioning

confidence: 99%

“…Given the wide range of possible structural and energy retrofitting schemes to couple in an integrated scheme, it is essential to proceed with methodologies that are capable of identifying optimal integrated retrofit solutions. Some of those methods, e.g., seismic resilience-based assessments, index-based methods, cost-benefit analyses and multicriteria decision-making (MCDM) approaches, scrutinised and compared by Carofilis et al [5], often consider a range of economic, social and technical decision variables (DVs) that are typical of interest to decision-makers. Different weights are usually given to the DVs, following the intuition of the decision-maker or determined through more rigorous criteria.…”

Section: Introductionmentioning

confidence: 99%

On the Influence of Climate and Seismic Hazard Conditions in the Identification of Optimal Retrofitting Strategies for Rc Buildings

Couto,

Mucedero,

Bento

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Past earthquakes have highlighted the vulnerability of existing reinforced concrete (RC) buildings, which constitute a large portion of the European building stock, most of which were not designed according to modern seismic codes. Moreover, their energy performance can also be highly unsatisfactory, leading to significant levels of energy consumption and CO2 emissions. The assembling of a retrofitting approach with low environmental impact, capable of integrating increased structural performance with energy efficiency, is thus evermore essential. In this respect, recent studies were carried out with a particular emphasis on incorporating both interventions by identifying the optimal intervention among several feasible alternatives. This study investigates the influence of different climate and hazard conditions on the optimal retrofitting strategy, using a multi-criteria decision-making (MCDM) framework that includes a range of economic, social, and technical decision variables related to the building's seismic and energy performance. To this end, a case study application was carried out on a school building representative of such a building typology in Italy. Four seismic retrofitting solutions, each combined with three energy-based interventions, were assessed, considering two seismic hazard levels -medium and high -and three distinct climate conditions -cold, mild and warm. Finally, for each combination of seismic hazard and climate condition, an MCDM framework was employed to identify the optimal combination of seismic and energyefficiency retrofitting schemes and the overall ranking of the different alternatives, aiming to investigate the influence of seismic hazard level and climate conditions on the optimal choice of a retrofitting intervention.

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“…Once the delays have been estimated, the repair process begins, i.e., repair time (TRE). The recovery path will likely have an irregular shape, but it can be idealized by different recovery functions, as illustrated in Figure 1a, such as linear [10], exponential [40], or trigonometric [41]. The expressions in Equation (1) mathematically describe these three functions.…”

Section: Seismic Resilience Of Buildingsmentioning

confidence: 99%

Seismic Resilience Assessment in Optimally Integrated Retrofitting of Existing School Buildings in Italy

et al. 2022

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Modern society requires that structures exhibit greater levels of resilience, especially under earthquakes. The seismic resilience of buildings is thus gaining increased attention as a particular, beyond-code approach. Seismically retrofitted buildings behave satisfactorily under expected earthquake scenarios; however, this does not guarantee operativity after a seismic event. This study critically reviews several methods currently available in the literature that quantify the seismic resilience level of buildings from different perspectives. An existing reinforced concrete school building, retrofitted according to four distinct strategies, is first evaluated in terms of seismic resilience levels. The overview and critical analysis of available resilience assessment frameworks determine the most suitable parameters to measure the seismic resilience for buildings. Subsequently, this metric is incorporated as an additional decision variable into an integrated seismic and energy retrofitting set of strategies. A multicriteria decision-making analysis is performed to select the optimally combined seismic and energy retrofitting alternative under social, technical, environmental evaluation, and seismic resilience aspects. We show how resilience impacts the preference for integrated seismic and energy retrofitting strategies, especially when this metric is considered as an annualized expected value.

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Assessment of Multi-Criteria Evaluation Procedures for Identification of Optimal Seismic Retrofitting Strategies for Existing RC Buildings

Cited by 18 publications

References 47 publications

Quantifying the potential benefits of risk-mitigation strategies on present and future seismic losses in Kathmandu Valley, Nepal

Quantifying the potential benefits of risk-mitigation strategies on present and future seismic losses in Kathmandu Valley, Nepal

On the Influence of Climate and Seismic Hazard Conditions in the Identification of Optimal Retrofitting Strategies for Rc Buildings

Seismic Resilience Assessment in Optimally Integrated Retrofitting of Existing School Buildings in Italy

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