Seismic loss assessment for regional building portfolios considering empirical seismic vulnerability functions

Li, Si-Qi; Gardoni, Paolo

doi:10.1007/s10518-023-01793-w

Cited by 20 publications

(1 citation statement)

References 49 publications

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“…Seismic occurrences of varying intensities have caused structural damage throughout time, resulting in significant social and economic costs (Li and Gardoni, 2024). For example, the Northridge earthquake in California (US) in 1994 caused roughly US$14 billion in insured losses, but the Kobe earthquake in Japan in 1995 caused absolute losses of US$150 billion (Calvi et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Multi-attribute-based procedure for seismic risk scenario in a historical area

Mascheri,

Chieffo,

Lourenço

2024

Preprint

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Seismic events have shown to be exceedingly damaging to structures over time, with serious social and economic consequences. As a result, large-scale seismic risk assessments are essential for reducing the potential damage from future earthquakes. Therefore, the proposed study attempts to examine the vulnerability and risk of unreinforced masonry buildings (URM) placed in aggregate conditions in a historical area of the city centre of Lisbon. To this purpose, a comprehensive exposure model was developed combining satellite remote sensing, GIS software, and census data. Subsequently, seismic hazard was evaluated in the area, considering both Peak Ground Acceleration (PGA) and macro-seismic intensity for different return periods (i.e. 2-50-100-475-975-2500-5000 years). Vulnerability was assessed by introducing a novel approach to earthquake risk assessment using Multi-Criteria Decision-Making methodologies. Specifically, the method employs the Analytic Hierarchy Process (AHP) and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) computational methods to evaluate parameter weights and vulnerability index. Damage scenarios, fragility curves and mean damage ratios curves were provided to offer an overview of the vulnerability of the assets exposed to risk. Finally, the expected consequences were evaluated in terms of direct economic losses showing an economic loss of 595 M€ for a 475-years return period, while 1108 M€ for 5000-years. This study significantly enhances seismic risk analysis for urban areas by introducing a Multi-Criteria Approach. This method simplifies vulnerability assessment, ensuring ease of application and reproducibility. Its insights offer valuable support for disaster risk management decisions, facilitating the implementation of resilience and risk-reduction strategies.

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Section: Introductionmentioning

confidence: 99%

Multi-attribute-based procedure for seismic risk scenario in a historical area

Mascheri,

Chieffo,

Lourenço

2024

Preprint

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The influence of torsion on acceleration demands in low-rise RC buildings

Ruggieri,

Vukobratović

2024

Bull Earthquake Eng

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This paper presents a study of acceleration demands in low-rise reinforced concrete (RC) buildings with torsion, evaluated by quantifying peak floor accelerations (PFAs) and floor response (acceleration) spectra (FRS). The study was performed with the aim to provide simple empirical formulas to quantify the amplification effects due to torsion, which can occur in most of the existing and new RC buildings. With this goal in mind, a set of eight archetype buildings was selected, characterized by an increasing floor eccentricity obtained by moving the centre of rigidity (CR) away from the centre of mass (CM). Numerical models of the proposed set of archetype RC buildings were considered in both linear elastic and nonlinear configurations. For the latter, the properties of models were widely varied, by systematically modifying parameters of plastic hinges, in order to obtain a sample of 1000 models. Non-structural components (NSCs) were considered linear elastic in all cases. To investigate acceleration demands, a set of forty Eurocode 8 spectrum-compatible ground motion records were used as input. For linear elastic building models, it was observed that the change of demands depends on the position of the NSC (in-plan and in-height), and on the distance between CR and CM. On the other hand, for nonlinear models, additional parameters must be considered, such as the building ductility (μ) and yielding force (Vy). New regression models were proposed for quantifying the observed differences in PFAs and FRS when torsion occurs. The efficiency of the proposed models was assessed by testing the new formulas on an existing case study building, as well as on the well-known SPEAR building.

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Seismic hazard models for typical urban masonry structures considering optimized regression algorithms

Li,

Han

et al. 2024

Bull Earthquake Eng

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Seismic loss assessment for regional building portfolios considering empirical seismic vulnerability functions

Cited by 20 publications

References 49 publications

Multi-attribute-based procedure for seismic risk scenario in a historical area

Multi-attribute-based procedure for seismic risk scenario in a historical area

The influence of torsion on acceleration demands in low-rise RC buildings

Seismic hazard models for typical urban masonry structures considering optimized regression algorithms

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