Computer-Aided Seismic Risk Assessment at Urban Scale. Model Definition and Validation on a Case Study

Basaglia, Alberto; Aprile, Alessandra; Pilla, Francesco; Spacone, Enrico

doi:10.7712/100016.2234.11825

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The results obtained by Basaglia et al (2016), however, have shown that seismic risk assessment results are not much affected by the adoption of the 2D formulation. In order to fully understand this evidence, some different aspects have to be considered.…”

Section: Multidirectional Urban Risk Assessmentmentioning

confidence: 97%

“…This correlation represents an update of a previous formulation (Basaglia et al, 2016); specifically, the vulnerability definition of RC has changed, passing from the one defined by CETE Méditerranée ( 2008) to the original GNDT method (GNDT-SSN, 1994). The reason is due to the weight and scores of the vulnerability parameters that are considered to be overestimated by the first formulation.…”

Section: 𝐼 𝑉 − 𝑉 Correlation For Rc Buildingsmentioning

confidence: 99%

“…Building's vulnerability typically assume its maximum value in one direction and its minimum value in the orthogonal direction, and can be effectively described by an elliptical function of the in-plan orientation. The vulnerability ellipse concept was firstly introduced by Grimaz (1993Grimaz ( , 1997 and applied by Basaglia et al (2016) to define the Vulnerability Index of buildings along their two principal directions (Fig. 3).…”

Section: Multidirectional Urban Risk Assessmentmentioning

confidence: 99%

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Performance-based Seismic Risk Assessment of Urban Systems

Basaglia

Aprile

Spacone

et al. 2018

International Journal of Architectural Heritage

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Disaster risk mitigation has become a global urgent need. Similarly to other natural hazards, earthquakes may cause significant damage on a large scale. In Europe and in other regions with dense urbanization, seismic events can heavily impact historical city centres due to the several structural fragilities. These centers are often part of the worldwide cultural heritage and their preservation is considered a strategic issue. Furthermore, earthquakes may have severe negative short-term economic effects on the impacted communities and adverse longer-term consequences for economic growth. For this reason, the development of an efficient approach for urban seismic risk assessment becomes essential. An original approach is proposed, based on performance concepts and multidisciplinary perspectives. The procedure is applied for validation to the city center of Concordia Sulla Secchia (Italy), damaged by the 2012 Pianura Padana Earthquake (PPE), comparing predicted damage scenarios with the actual post-seismic survey data.

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Section: Multidirectional Urban Risk Assessmentmentioning

confidence: 97%

Section: 𝐼 𝑉 − 𝑉 Correlation For Rc Buildingsmentioning

confidence: 99%

Section: Multidirectional Urban Risk Assessmentmentioning

confidence: 99%

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Performance-based Seismic Risk Assessment of Urban Systems

Basaglia

Aprile

Spacone

et al. 2018

International Journal of Architectural Heritage

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“…Proper analytical functions are adopted to derive the macro-seismic vulnerability from the GNDT vulnerability indexes, making a clear distinction between masonry and reinforced concrete structures (Ferreira et al 2013, Basaglia et al 2018). The directional character of the seismic vulnerability of the buildings is explicitly taken into account within the vulnerability index method by using a novel elliptic interpolation (Basaglia et al 2016). The functional relationship at ELC among the interfering buildings is expressed by a proper mechanical model whose definition allows the evaluation of the reliability of the urban system crossed by the strategic roadway.…”

Section: Introductionmentioning

confidence: 99%

Seismic Risk Assessment and Mitigation at Emergency Limit Condition of Historical Buildings along Strategic Urban Roadways. Application to the “Antiga Esquerra de L’Eixample” Neighborhood of Barcelona

Cara

Aprile

Pelà

et al. 2018

International Journal of Architectural Heritage

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This paper presents a management tool for the large-scale assessment and mitigation of the seismic risk of urban systems. The research introduces a new perspective for a scientifically tackled holistic approach.The proposed methodology considers multiple objectives, from the identification of the most vulnerable buildings whose collapse may hinder the operationality of strategic urban roadways after the occurrence of an earthquake, up to the proposal of proper interventions to improve their functionality. The approach uses a performance-based approach founded on the concept of urban Emergency Limit Condition.Plotting maps of geo-referenced scenarios by means of GIS software have revealed to be extremely useful to detect the weak points of the urban network and to plan suitable strategies of seismic risk mitigation and appropriate enhancement of reliability. The proposed methodology is applied to the "Antiga Esquerra de l'Eixample" neighbourhood of Barcelona that hosts the strategic route to the hospital and is characterized by high levels of seismic vulnerability of existing buildings and exposition of its highdensity population.

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