Robustness and uncertainties of seismic damage estimates at urban scale: a methodological comparison on the example of the city of Oran (Algeria)

Senouci, Abbas; Bard, Pierre Yves; Farsi, Mohamed Naboussi; Beck, Elise; Cartier, Stéphane

doi:10.1007/s10518-012-9406-3

Cited by 10 publications

(8 citation statements)

References 6 publications

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“…Therefore, it is recognized that qualitative methods enclose uncertainties due to assumptions and summary survey. In this study which concerned more than 5,000 buildings, it has been found that differences in estimation from a method to another (GNDT, RISK-UE, and VULNERALP) are limited to acceptable intervals for the whole sample (equal or less than a half EMS grade) (Senouci and al. 2013).…”

Section: Urban Requalification Considerations Uncertainties Issue and Proposalmentioning

confidence: 97%

“…Another aspect that leads to search for a convenient mapping method is the uncertainty issue related to vulnerability evaluation. Several authors highlight the fact that huge uncertainties make difficult to consider results at the scale of individual building (Fäh et al 2001;Roca et al 2006;Guéguen, Michel, and LeCorre 2007;Oliveira 2008;Rota, Penna, and Strobbia 2008;Senouci et al 2013). For instance, Fäh et al (2001) established seismic scenarios for the city of Basel (Switzerland) using fragility curves derived from EMS vulnerability classes and ATC13 methodology.…”

Section: Urban Requalification Considerations Uncertainties Issue and Proposalmentioning

confidence: 99%

“…This study has used the outcomes of a preliminary evaluation of seismic risk in a district of Oran city (Senouci et al 2013) (Figure 2). Vulnerability index and subsequently physical damage have been robustly estimated with semi-qualitative methods for a set of more than 5,000 buildings.…”

Section: Origin Of Datamentioning

confidence: 99%

“…Here, it is evident that local constraints (technical, economic and financial) are determinant in the definition of a schedule for the implementation of the urban plan. As an example form Oran, in the last years a project of rehabilitation of buildings has been implemented by defining 200 buildings in accordance of the available budget offered by central governmental instances; the project does not handle the seismic vulnerability but only the maintenance conditions (Cartier, Valette, and Mediene 2012;Senouci et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Mapping seismic vulnerability at urban scale: Discussion on relevant cartography representations and smoothing for urban planning purposes on the Oran case study

Senouci

Bard

Beck

et al. 2018

Soil Dynamics and Earthquake Engineering

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Earthquake damage and loss scenarios are considered as a powerful tool to help in the design of efficient seismic mitigation policies. Moreover, at a city scale, adequate urban planning may significantly contribute to improve resilience through requalification of inherited urban fabrics and/or appropriate land use. In this perspective, the present paper investigates what could be the optimal graphic representation of probable losses at urban scale, which be most relevant for seismic risk management. The goal is to provide urban planners with guidelines on how to combine the use of vulnerability index-based damage estimates and GIS tools, to identify urban fabrics that need requalification. The proposed methodology consists in starting from damage estimates at the individual building scale, and using GIS (Geographic Information Systems) capacities to aggregate the expected damage on neighborhoods of increasing size, from blocks to large urban districts, in order to delimitate homogeneous urban zones. The criteria thus for choosing the optimal aggregation level are based on the need to obtain legible maps combining robust damage estimations -which implies statistics over a large enough number of buildings -, and a clear identification of the most vulnerable urban areas on which dedicated actions should be focused in priority.These methodologies are presented and tested on the example of the city of Oran (Algeria), and on the basis of a prior vulnerability study based on GNDT and RISK-UE vulnerability index approaches. The main outcome is the identification of different urban zones, which exhibit some homogeneity regarding both their average seismic response and their urban function. The most vulnerable urban fabrics require not only individual retrofitting measures at building scale; they also need urban requalification because it is more convenient to deal simultaneously with urban and safety considerations.

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Section: Urban Requalification Considerations Uncertainties Issue and Proposalmentioning

confidence: 97%

Section: Urban Requalification Considerations Uncertainties Issue and Proposalmentioning

confidence: 99%

Section: Origin Of Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mapping seismic vulnerability at urban scale: Discussion on relevant cartography representations and smoothing for urban planning purposes on the Oran case study

Senouci

Bard

Beck

et al. 2018

Soil Dynamics and Earthquake Engineering

Self Cite

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show abstract

“…Other European cities have benefited from studies of seismic risk and buildings vulnerability assessment, such as, Angra do Heroísmo by Veludo et al (2013) and Lisbon by Lamego et al (2016). In Algeria, since the 2003 Boumerdes earthquake (Ms = 6.3), seismic vulnerability assessment studies of buildings throughout some large cities of Algeria have been carried: such as those done for Algiers by Farsi and Lazzali, 2003;Amina et al, 2010;Novelli et al, 2015, for Constantine city Boukri et al, 2014;Benhamouche, 2014;Guettiche et al, 2017, for Oran city by Senouci et al (2013) and for Annaba city by Athmani et al (2015).…”

Section: Introductionmentioning

confidence: 99%

Buildings Vulnerability Assessment and Damage Seismic Scenarios at Urban Scale: Application to Chlef City (Algeria)

et al. 2018

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Seismic scenarios are tools used to assess seismic risk at the city level. This allows the assessment of the vulnerability of exposed elements to risk (buildings, bridges, etc.). In the case of Chlef city (formerly El Asnam), this evaluation type proves to be useful given the seismic hazard to which it is exposed and the building park size. This city has been shaken in the past by several earthquakes including that of the El Asnam 1980 (Ms = 7.3), which caused hundreds of casualties and destroyed 70% of the city. In this paper, a seismic vulnerability assessment at urban scale and three seismic damage scenarios are simulated using the "RISK-UE" methodology. First, a recreation of the El Asnam 1980 earthquake, considering the urban conditions of the 1980s, is done. A difference of about 12% between observed and simulated damage is observed. Secondly, two senarios considering the current urban conditions are simulated then, vulnerabilty curves are developed. The simulations purpose is to detect the most vulnerable typologies and districts in the event of a similar earthquake and to provide decision support elements to the local seismic risk manager. The results show a structural damage decrease compared to the 1980 urban conditions.

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Seismic vulnerability assessment of historical masonry buildings located in Annaba city (Algeria) using non ad-hoc data survey

Athmani

Gouasmia

Ferreira

et al. 2014

Bull Earthquake Eng

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Robustness and uncertainties of seismic damage estimates at urban scale: a methodological comparison on the example of the city of Oran (Algeria)

Cited by 10 publications

References 6 publications

Mapping seismic vulnerability at urban scale: Discussion on relevant cartography representations and smoothing for urban planning purposes on the Oran case study

Mapping seismic vulnerability at urban scale: Discussion on relevant cartography representations and smoothing for urban planning purposes on the Oran case study

Buildings Vulnerability Assessment and Damage Seismic Scenarios at Urban Scale: Application to Chlef City (Algeria)

Seismic vulnerability assessment of historical masonry buildings located in Annaba city (Algeria) using non ad-hoc data survey

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