Seismic Damage Scenarios Induced by Site Effects on Masonry Clustered Buildings: A Case Study in South Italy

Formisano, Antonio; Chieffo, Nicola

doi:10.1080/15583058.2022.2104143

Cited by 25 publications

(2 citation statements)

References 52 publications

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“…As a result, the initial method was considerably expanded to incorporate masonry building aggregates, allowing for the effects of interaction between adjacent structures to be accounted for (Chieffo et al, 2023). Indeed, (Formisano et al, 2009) added five parameters to the original Benedetti and Petrini's form, to account for aggregate effects, later calibrating the scores and weights using a 3D analytical model (Formisano et al, 2015) and subsequently widely applying the methodology, see (Chieffo et al, 2023(Chieffo et al, , 2022Formisano and Chieffo, 2022). The same issue was investigated by the study proposed by (Vicente, 2008), later presented by (Vicente et al, 2011) and re-calibrated by (Ferreira et al, 2017), which proposed 14 parameters for taking into account building interactions.…”

Section: Seismic Vulnerability Modelmentioning

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: Seismic Vulnerability Modelmentioning

confidence: 99%

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

Mascheri,

Chieffo,

Lourenço

2024

Preprint

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“…The historic masonry structures are vulnerable to seismic loading and their seismic vulnerability assessment varies from simplified to advanced methods such as risk index classification by visual observation [1] [2] to numerical modeling for detailed structural behavior determination [3] [4]. The combination of these two approaches [5] can be preferred, as well.…”

Section: Introductionmentioning

confidence: 99%

The Challenges and Advantages of Macro Modeling in Ansys Software for Seismic Vulnerability Assessment of Historic Masonry Structures

Demir,

Yücetürk,

Aktaş

et al. 2023

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

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This study aims at creating an advancement guideline for a software which can be used for seismic vulnerability assessment of historic masonry structures by revealing the results of an experience related to the macro modeling of a historic masonry building. The case study structure is Bergama Bedesten (15th-16th centuries) located in Bergama, İzmir, Turkey. ANSYS software is used for the Finite Element Modeling of the structure. The seismicity at its location is determined and the structural response under lateral loads is obtained together with the dynamic characteristics. Mesh design, component creation according to the used material change in structural elements, contact surface identification, the arrangement of the stress scales, and result interpretation are realized. For these stages, the challenges are discussed with the solutions. The advantageous aspects of the software are explained. For the challenges, in mesh design, the ineffectiveness of cartesian method for some elements was detected and tetrahedrons method was chosen. In contact surface identification, the overlapping portions of structural components could not be detected by the software exactly, so the manual surface separation was realized. In the stress level interpretation, the lack of assignment for material limit strength values to the analysis scale was experienced and the addition of limit values was carried out. The scale also needs manual arrangement for the increase of interval numbers of stress values to emphasize vulnerable zones. This flexibility of scale to be arranged can be seen as an advantage, as well. The 3d section and axonometric view creation provide the presentation of stress changes at inner and outer surfaces of the structure which is another positive side.

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Urban scale risk assessment including SSI and site amplification

Amendola

Pitilakis

2022

Bull Earthquake Eng

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Large-scale risk analysis is typically performed considering existing fragility curves, calculated in most cases without adequately accounting for local site amplification (SAmp) and soil-structure interaction (SSI) effects. Nevertheless, foundation flexibility and local site effects may lead to a substantial difference in the fragility or loss estimates. Including these effects on the city-scale vulnerability analysis is challenging due to the complexity of defining the whole interacting urban system. We propose a novel framework for the fragility assessment of structures considering the influence of SSI and local site amplification effects, suitable for large-scale applications. The applicability of the proposed approach is based on globally available data regarding the soil, the foundation, and the building portfolio. Site amplification is considered directly in the resulting fragility curves using site response analyses. An improved taxonomy is adopted to make the approach implementable in the OpenQuake software, introducing VS,30 and H/B within the structural features as proxies for the site and SSI effects. Finally, following the performance-based earthquake engineering framework, the outcomes of the methodological framework are adopted to estimate the nominal probability of failure for selected building classes belonging to the majority of structural types of the city of Thessaloniki, Northern Greece. The main findings demonstrate that the conventional way of calculating fragility curves may lead to a different seismic risk evaluation, especially in soft soil formations.

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Seismic Damage Scenarios Induced by Site Effects on Masonry Clustered Buildings: A Case Study in South Italy

Cited by 25 publications

References 52 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 Challenges and Advantages of Macro Modeling in Ansys Software for Seismic Vulnerability Assessment of Historic Masonry Structures

Urban scale risk assessment including SSI and site amplification

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