Mapping soil effects in Barcelona, Spain, through an integrated GIS environment

Jiménez, M. J.; Garcı́a-Fernández, Mariano; Zonno, G.; Cella, Francesca

doi:10.1016/s0267-7261(00)00007-5

Cited by 24 publications

(9 citation statements)

References 23 publications

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“…During the last decades many "urban mega-sites" were analysed in order to provide the expected local seismic response, under strong motion conditions, as a tool for microzonation and risk reduction studies (Fäh et al 1997;Faccioli 1999;Jimenez et al 2000;Raptakis et al 2004;Panza et al 2004;Ansal et al 2010). No microzonation studies have been performed until now in the whole urban area of the city of Rome (about 300 km 2 extended) which hosts a unique historical heritage and about 3 million inhabitants.…”

Section: Introductionmentioning

confidence: 99%

Dynamic properties of low velocity alluvial deposits influencing seismically-induced shear strains: the Grottaperfetta valley test-site (Rome, Italy)

Caserta

Martino

Bozzano

et al. 2012

Bull Earthquake Eng

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The presence of peats and high compressibility inorganic clays within alluvial fills on the left-side tributaries of the Tiber River, close to Rome's historic center in Italy, is well documented in literature. Nevertheless, few literature data exist until now on the dynamic properties of these deposits by undisturbed bore-hole samples. The Galba test-site was set up to characterise dynamic properties of the alluvial deposits by using lab-tests as well as to derive velocity profiles by seismic noise measurements. These were performed in the Giustiniano Imperatore area located in the Grottaperfetta valley, about 2 km south of Rome's historic centre. The alluvial deposits filled a paleovalley excavated in the bedrock during the Wurm glacial (18-20 ky). The stratigraphic setting of the alluvial body was reconstructed along three geological cross-sections by means of the available logs; seven lithotecnical horizons can be distinguished within the alluvial body, some tens of meters thick, based on both log-stratigraphic data and in-site geotechnical tests. These horizons include peaty layers (T) and high compressibility inorganic clays (AGI), which characterise the alluvial deposits in the Grottaperfetta valley. They do not have direct correlation with the alluvial horizons which constitute the alluvial body of the main Tiber valley in Rome's historical centre. These alluvial horizons which are distinguished and characterised at the Galba test-site can be regarded as typical of other lateral valleys of the Tiber River in Southern Rome. They are characterised by the presence of similar high compressibility clayey deposits as well as peaty layers up to some meters thick. Undisturbed samples were also obtained at the Galba test-site for dynamic testing via resonant column and cyclic torsional shear tests. In order to attribute dynamic properties to the alluvial body at the Grottaperfetta valley, an extrapolation process was performed based on a detailed engineering-geology model of the alluvial body which was reconstructed along three transversal geological sections of the valley using bore-hole data. Three subsoil profiles, considered representative of the geological setting along the three reconstructed transversal cross sections, were analysed by seismic noise measurements performed specifically to derive S-waves velocity profiles. The results obtained show a very low velocity (< 180 m/s) for the layers T and AGI. 1D modelling of seismic shaking was performed by the code Shake91, in order to evaluate the influence of the low-velocity strata on maximum shear strains induced within the alluvial deposits under the maximum expected seismic action. The results of the numerical modelling indicate that the AGI and the T layers play a key role in: (i) concentrating the maximum shear strain along the subsoil profiles, even though the volumetric threshold is never exceeded; (ii) increasing the maximum shear strain along the subsoil profiles; (iii) causing the resonance frequency of the alluvial fill to assume an almost constant ...

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Section: Introductionmentioning

confidence: 99%

Dynamic properties of low velocity alluvial deposits influencing seismically-induced shear strains: the Grottaperfetta valley test-site (Rome, Italy)

Caserta

Martino

Bozzano

et al. 2012

Bull Earthquake Eng

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“…For the preparation of these hazard maps, raster background images (scanned from topographical, geological, groundwater and slope maps, as well as from geophysical maps showing spatial peak ground-acceleration, site-amplification and Swave velocity values) were digitized to form layers in vector data (Kıncal, 2005). GIS enables the end user to carry out a complete land-use planning and seismic-risk assessment at regional, sub-regional and local scale (Jimenez et al, 2000). All analyses for the present study were carried out at a local scale.…”

Section: Methodsmentioning

confidence: 99%

Large-scale land-suitability mapping in the GIS environment for the construction site of the University Olympic Village in Izmir (Turkey)

Kıncal¹,

Koca²,

Loon³

2009

Geologos

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Participants of the 23rd University Olympic Games held in Izmir (Turkey) were hosted in a Universiade Olympic Village that had to be newly constructed. A risk analysis has been performed to assess potential engineering problems at the envisaged construction site. The risk analysis was largely based on a new, large-scale land-suitability map that was prepared in the GIS environment with much detail for this type of construction work. Information was collected from several maps, in combination with mapping in the field, drilling and seismic data. Geological, geotechnical, geophysical and morphological data were then superimposed on these analyses. This sequence of overlay analyses was performed with the help of GIS software (MapInfo Professional 7.5); this resulted in five hazard maps. Risk points (1-11) were then attributed to the different zones in the five digital hazard maps. A land-suitability map indicating the suitability for envisaged constructional activities was subsequently obtained in the form of an overlay of the five hazard maps, thus allowing to calculate a total risk for each zone on this map. The land-suitability map that was thus obtained, has been prepared for a 1:1,000 scale development plan; such a large scale is uncommon in this context.

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“…However, few of these studies are well-documented in the literature. An attempt will be made in this section to briefly review the available literature and give a more detailed explanation about four studies conducted in Benevetto, Italy [32][33][34]; Barcelona, Spain [21]; Thessaloniki, Greece [26,40]; and Dinar, Turkey [3].…”

Section: Introductionmentioning

confidence: 99%

Urban Seismic Microzonation Studies at Small Scales: Sisli/Istanbul (Turkey)

et al. 2011

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The main purpose of this study is to provide a high-resolution application of urban seismic microzonation. A probabilistic seismic hazard analysis was undertaken in the study area using Poisson probabilistic approaches. The resulting hazard is characterized by a 15% probability that a given level of acceleration will be exceeded in a 50-year period. Using deterministic seismic hazard analysis, the magnitudes were estimated by a quadruple rupture model (with three different fault lengths, 108, 119 and 174 km) of the North Anatolian Fault Zone in the Marmara Region. Using both analyses (deterministic and probabilistic), the magnitude of the design earthquake was taken as 7.6. From this design earthquake, accelerations were estimated for several distances (from 25 to 50 km) using several attenuation relationships. In the second phase of the study, soil amplification factors and site characteristic periods were determined and estimated by seismic measurements and Standard Penetration Test data for the Sisli area of central Istanbul. Microtremor and earthquake data were evaluated to compare the characteristic site period data obtained. According to Eurocode soil classifications, the study area mainly consists of B type soils. A small part of the study area has C and A type soils. Characteristic site periods obtained by seismic methods agree with strong (earthquake) and weak (ambient noise) motion spectral values in some parts of the study area. Finally, a seismic microzonation map was prepared for integrated use, incorporating all geophysical and geotechnical data.

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Mapping soil effects in Barcelona, Spain, through an integrated GIS environment

Cited by 24 publications

References 23 publications

Dynamic properties of low velocity alluvial deposits influencing seismically-induced shear strains: the Grottaperfetta valley test-site (Rome, Italy)

Dynamic properties of low velocity alluvial deposits influencing seismically-induced shear strains: the Grottaperfetta valley test-site (Rome, Italy)

Large-scale land-suitability mapping in the GIS environment for the construction site of the University Olympic Village in Izmir (Turkey)

Urban Seismic Microzonation Studies at Small Scales: Sisli/Istanbul (Turkey)

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