Seismic Zonation of Barcelona Based on Numerical Simulation of Site Effects

Cid, José Antonio Villamarín; Susagna, Teresa; Goula, Xavier; Chavarria, L.; Figueras, Sara; Fleta, J.; Casas, A.; Roca, A.

doi:10.1007/978-3-0348-8177-7_17

Cited by 11 publications

(19 citation statements)

References 8 publications

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“…Taking into account the seismic zonation of Barcelona based on local effects from Cid et al (2001) shown in FIGURE 8, this increment was applied to soil zones I, II and III. FIGURE 9a…”

Section: Seismic Scenario Assessment With Site Effectsmentioning

confidence: 99%

Seismic hazard and risk scenarios for Barcelona, Spain, using the Risk-UE vulnerability index method

Lantada

Irizarry

Barbat

et al. 2009

Bull Earthquake Eng

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143

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The Vulnerability Index Method, in its version developed in the framework of the European project Risk-UE, has been adapted and applied in this article, to evaluate the seismic risk for the city of Barcelona (Spain) through a GIS based tool. According to this method, which defines five damage states, the action is expressed in terms of the macroseismic intensity and the seismic quality of the buildings by means of a vulnerability index. The probabilities of damage states are obtained considering a binomial or betaequivalent probability distribution. The most relevant seismic risk evaluation results obtained, for current buildings and monuments of Barcelona, are given in the article as scenarios of expected losses.

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“…Taking into account the seismic zonation of Barcelona based on local effects from Cid et al (2001) shown in FIGURE 8, this increment was applied to soil zones I, II and III. FIGURE 9a…”

Section: Seismic Scenario Assessment With Site Effectsmentioning

confidence: 99%

Seismic hazard and risk scenarios for Barcelona, Spain, using the Risk-UE vulnerability index method

Lantada

Irizarry

Barbat

et al. 2009

Bull Earthquake Eng

Self Cite

143

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“…The three investigated sites are on the same geological formation (Tricicle). In the previous studies [Cid, 2001], this geological formation is considered as a single unit, presenting only one H/V ratio predominant period values. However, the predominant results obtained in each of these three sites are quite different, changing the order of magnitude in some cases.…”

Section: Discussionmentioning

confidence: 99%

“…The complex structures of the tertiary lead to an abrupt variation of thickness in the quaternary deposits and generate lateral contacts between diverse tertiary materials. ', BB' and CC' of Barcelona (obtained from [IGC, 2009] and [UPC, CLABSA & Ajuntament de Barcelona, 1997] Previous soil response studies in Barcelona roughly divide the city into five sections [Cid et al, 2001]: (1) rock, where rock is expected, in the mountains surrounding the city (Montjuic and Collserola), obtaining a soil transfer function without amplification peak; (2) soil 1, close to the sea and presenting an important thicknesses of non-consolidated sand layer (deltaic), obtaining the first amplification peak at about 2.5 Hz and amplification of 2.5 ; (3) soil 2 in the plain of Barcelona, characterized by a geological formation known as Tricycle, where the amplification peak is found at about 5 Hz and amplification of 2.5; (4) soil 3, near the mountains and characterized by small thicknesses in sediments, the amplification peak being about 5 Hz and amplification of 2.25; and (5) artificial soil, corresponding to non-studied zones (Fig. 2).…”

Section: Geological Setting and Previous Studies In The Experimental mentioning

confidence: 99%

“…The thicknesses of these filler materials could be higher than 35 m [IGC, 2011]. Although abundant historical data describe and situate a large number of paleochannels and streams ( [Cerda, 1855]; [Vazquez, 1861]; [Arandes, 1998] [Cid et al, 2001] The first selected site is placed in downtown Barcelona, in Catalunya Square (CS), where a wide subterranean stream exists. Two other small paleochannels are also known of in this area ( [Arandes, 1998]; [Ventayol et al, 2000]).…”

Section: Geological Setting and Previous Studies In The Experimental mentioning

confidence: 99%

See 1 more Smart Citation

Nanozonation in Dense Cities: Testing a Combined Methodology in Barcelona City (Spain)

Salinas¹,

Caselles²,

Pérez-Gracia³

et al. 2013

Journal of Earthquake Engineering

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Microzonation is widely used in seismic risk evaluations to define the predominant period values, which are usually associated with extended areas of a few hundred meters. However, the representative values corresponding to these areas are obtained from few measurements in each area. Thereby, results are accurate only in the case of depth-dependent soils. However, not detected narrow and sharp lateral changes in soil are potentially the cause of imprecision and could be a source of specific errors. This paper aims to present several tests conducted in order to emphasise the importance of accurate selection of points, to underscore the necessity of more precise and detailed evaluations, and to suggest a possible methodology to select the most appropriate data acquisition points. Results highlight the need to divide microzonation areas into smaller zones for a precise evaluation in locations where sudden changes in soil characteristics exist. Therefore, in such sites the requirement of nanozonation appears; defining zones with the same soil response. Distance between vibration measurements could be the main problem for nanozonation; data acquisition in areas with irregular geology can be time-consuming when a precise analysis is required. In the most complicated environments or in dense cities, it could even be unfeasible.Consequently, it is necessary to establish a functional methodology to adequately distribute the measurement points throughout the area. On this occasion, three sites in Barcelona city were studied. This city is surrounded by mountains at NW, W and S, and by the Mediterranean Sea at N and E. As a consequence, the shallow geology is characterized by many paleochannels and streams that are currently buried. These geological structures most likely affect the soil response. Several tests were carried out to determine this dependence. The tests were based on Ground Penetrating Radar (GPR) surveys to define the paleochannels position and on vibration measurements in order to define properly the soil response.The results from both methods were compared to the known geology to accurately define the effect of the shallow geological structures in the predominant period and in the GPR images. Areas with the same geological unit but different materials were identified in the GPR images, allowing the selection of the most appropriate distance between vibration measurements in each place. As final result, predominant 2 periods that were measured over the same geological unit but over different material showed changes higher than the 40% in short distances. This procedure could improve the soil response maps, including nanozonation.

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“…In order to assess the seismic vulnerability, the spatial data were collected to synthetically assess the earthquake hazard in Gyeongju historic areas. GIS based microzonation for seismic risk is becoming more common and more essential (Cid et al, 2001;Kim et al, 2002;Sun et al, 2005;Tyagunov et al, 2006;Glatron and Beck, 2008;Salamon et al, 2010). Seismic microzonation, which is a city scale hazards distribution mapping based on a geotechnical information system, made a reliable estimation of spatial geotechnical data for the Gyeongju historic areas.…”

Section: Gis Based Seismic Microzonationmentioning

confidence: 99%

Seismic risk assessment of architectural heritages in Gyeongju considering local site effects

Park

Kim

2013

Nat. Hazards Earth Syst. Sci.

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Abstract. A seismic risk assessment is conducted for cultural heritage sites in Gyeongju, the capital of Korea's ancient Silla Kingdom. Gyeongju, home to UNESCO World Heritage sites, contains remarkable artifacts of Korean Buddhist art. An extensive geotechnical survey including a series of in situ tests is presented, providing pertinent soil profiles for site response analyses on thirty cultural heritage sites. After the shear wave velocity profiles and dynamic material properties were obtained, site response analyses were carried out at each historical site and the amplification characteristics, site period, and response spectrum of the site were determined for the earthquake levels of 2400 yr and 1000 yr return periods based on the Korean seismic hazard map. Response spectrum and corresponding site coefficients obtained from site response analyses considering geologic conditions differ significantly from the current Korean seismic code. This study confirms the importance of site-specific ground response analyses considering local geological conditions. Results are given in the form of the spatial distribution of bedrock depth, site period, and site amplification coefficients, which are particularly valuable in the context of a seismic vulnerability study. This study presents the potential amplification of hazard maps and provides primary data on the seismic risk assessment of each cultural heritage.

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Seismic Zonation of Barcelona Based on Numerical Simulation of Site Effects

Cited by 11 publications

References 8 publications

Seismic hazard and risk scenarios for Barcelona, Spain, using the Risk-UE vulnerability index method

Seismic hazard and risk scenarios for Barcelona, Spain, using the Risk-UE vulnerability index method

Nanozonation in Dense Cities: Testing a Combined Methodology in Barcelona City (Spain)

Seismic risk assessment of architectural heritages in Gyeongju considering local site effects

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