New Design Spectra in Eurocode 8 and Preliminary Application to the Seismic Risk of Thessaloniki, Greece

Pitilakis, Kyriazis; Riga, Evi; Anastasiadis, Anastasios

doi:10.1007/978-3-319-10786-8_3

Cited by 11 publications

(11 citation statements)

References 33 publications

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“…In this work seismic risk will be evaluated only for the contemporary RC building stock, as it constitutes the majority of the buildings in the study area. The building inventory was compiled in previous studies, first, within the 2001-2004 RISK-UE Project (Pitilakis et al 2004) and, then, within the 2009-2012 Syner-G Project (Pitilakis et al 2014), and has been used in recent seismic risk studies (Kappos et al 2008;Riga et al 2017;Pitilakis et al 2015).…”

Section: Study Areamentioning

confidence: 99%

“…Recent works (Pitilakis et al 2015;Riga et al 2017) have addressed the seismic risk assessment in the city of Thessaloniki using the CSM but in these studies a different representation of seismic hazard was adopted, based on the available PSHA studies combined with either code-based or detailed soil classification schemes and site specific ground response analyses. In this study a step forward will be made by incorporating the results of a 3D physics-based scenario reproducing with reasonable accuracy the historical Volvi earthquake of June 20 th 1978 (moment magnitude M W =6.5), which affected dramatically the city of Thessaloniki.…”

Section: Introductionmentioning

confidence: 99%

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Seismic risk assessment at urban scale from 3D physics-based numerical modeling: the case of Thessaloniki

Smerzini

Pitilakis

2017

Bull Earthquake Eng

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The main aim of this work is to present a prototype of seismic risk assessment study at urban scale which incorporates next generation tools for hazard assessment, with application to the city of Thessaloniki, Northern Greece. The key ingredient of the proposed approach is the characterization of earthquake ground motion by means of three-dimensional broadband physics-based numerical simulations, which explicitly account for the fault rupture, the propagation path in heterogeneous media and complex geological conditions. The seismic damage of contemporary reinforced concrete building stock of the city of Thessaloniki has been evaluated using the capacity spectrum method, for a scenario corresponding to the destructive historical earthquake of June 20 th 1978 (M W 6.5). Although the vulnerability model considered in these analyses reflects the contemporary building stock and, hence, differs from the situation at the time of the earthquake, the soundness of our damage estimates has been successfully verified through the comparison with the post-1978 earthquake damage observations. Results of this study demonstrate that 3D physics-based simulations can provide a more accurate and detailed characterization of earthquake ground motion and of its spatial variability, as compared to standard empirical approaches, and can be effectively used to improve seismic risk studies for strategic urban areas.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic risk assessment at urban scale from 3D physics-based numerical modeling: the case of Thessaloniki

Smerzini

Pitilakis

2017

Bull Earthquake Eng

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“…Regarding the 3D basin model, the following assumptions were made: (i) the 3D geometry of the geologic bedrock basement, as published in Apostolidis et al (2004), was implemented in the numerical model (see Figure 3, left panel); (ii) two generic soil profiles with linear visco-elastic behavior were defined for the alluvial deposits overlying the bedrock for two ground categories, i.e. Eurocode 8 (EC8) soil B (VS30 = 360-800 m/s) and C (VS30 = 180-360 m/s), following the soil classification mapped in Figure 3 (right panel, from Pitilakis et al, 2015).…”

Section: Computational Model For the Thessaloniki Urban Areamentioning

confidence: 99%

3d Numerical Modelling of the Seismic Response of the Thessaloniki Urban Area: The Case of the 1978 Volvi Earthquake

2017

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This study aims at showing the numerical modelling of earthquake ground motion in the Thessaloniki urban area, using a 3D spectral element approach. The availability of detailed geotechnical/geophysical data together with the seismological information regarding the relevant fault sources allowed us to construct a large-scale 3D numerical model suitable for generating physics-based ground shaking scenarios within the city of Thessaloniki up to maximum frequencies of about 2 Hz. Results of the numerical simulation of the destructive MW6.5 1978 Volvi earthquake are addressed, showing that realistic estimates can be obtained. Shaking maps in terms of ground motion parameters such as PGV are used to discuss the main seismic wave propagation effects at a wide scale. ΠερίληψηΑντικείμενο της παρούσας μελέτης είναι η αριθμητική προσομοίωση της σεισμικής εδαφικής κίνησης στην αστική περιοχή της Θεσσαλονίκης με τη χρήση της μεθόδου των φασματικών στοιχείων. Η διαθεσιμότητα λεπτομερών γεωτεχνικών/γεωφυσικών δεδομένων, καθώς και σεισμολογικών πληροφοριών για τα ρήγματα που επηρεάζουν την περιοχή, μας επέτρεψε την κατασκευή ενός τρισδιάστατου αριθμητικού προσομοιώματος μεγάλης κλίμακας, κατάλληλου για την παραγωγή σεναρίων εδαφικής κίνησης για την πόλη της Θεσσαλονίκης και για μέγιστη συχνότητα 2 Hz. Στη μελέτη αυτή παρουσιάζονται αποτελέσματα της αριθμητικής προσομοίωσης του καταστροφικού σεισμού της Βόλβης του 1978, μεγέθους Mw6.5, καταδεικνύοντας τη δυνατότητα επίτευξης ρεαλιστικών εκτιμήσεων. Τέλος, χρησιμοποιούνται χάρτες εδαφικής ταλάντωσης σε όρους παραμέτρων εδαφικής κίνησης όπως PGV για τη μελέτη των κύριων φαινομένων διάδοσης σεισμικών κυμάτων σε μεγάλη κλίμακα. Λέξεις κλειδιά: ντετερμινιστική σεισμική επικινδυνότητα, προέλαση σεισμικών κυμάτων, Μέθοδος Φασματικών Στοιχείων.

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“…Simplified geotechnical classification of the study area according to EC8 (based on Pitilakis et al., ).…”

Section: Application In Thessalonikimentioning

confidence: 99%

“…Liquefaction susceptibility map of the study area according to HAZUS classification. Lines represent the main edges of the road network (based on Pitilakis et al., ).…”

Section: Application In Thessalonikimentioning

confidence: 99%

Systemic Seismic Risk Assessment of Road Networks Considering Interactions with the Built Environment

Argyroudis

Selva

Gehl

et al. 2015

Computer aided Civil Eng

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113

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This article presents an integrated approach for the probabilistic systemic risk analysis of a road network considering spatial seismic hazard with correlation of ground motion intensities, vulnerability of the network components, and the effect of interactions within the network, as well as, between roadway components and built environment to the network functionality. The system performance is evaluated at the system level through a global connectivity performance indicator, which depends on both physical damages to its components and induced functionality losses due to interactions with other systems. An object-oriented modeling paradigm is used, where the complex problem of several interacting systems is decomposed in a number of interacting objects, accounting for intra-and interdependencies between and within systems. Each system is specified with its components, solving algorithms, performance indicators and interactions with other systems. The proposed approach is implemented for the analysis of the road network in the city of Thessaloniki (Greece) to demonstrate its applicability. In particular, the risk for the road network in the area is calculated, specifically focusing on the short-term impact of seismic events (just after the earthquake). The potential of road blockages due to collapses of adjacent buildings and overpass bridges is analyzed, trying to individuate possible criticalities related to specific components/subsystems. The application can be extended based on the proposed approach, to account for other interactions such as failure of pipelines beneath the road segments, collapse of adjacent electric poles, or malfunction of lighting and signaling systems due to damage in the electric power network. C 2015 Computer-Aided Civil and Infrastructure Engineering.

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New Design Spectra in Eurocode 8 and Preliminary Application to the Seismic Risk of Thessaloniki, Greece

Cited by 11 publications

References 33 publications

Seismic risk assessment at urban scale from 3D physics-based numerical modeling: the case of Thessaloniki

Seismic risk assessment at urban scale from 3D physics-based numerical modeling: the case of Thessaloniki

3d Numerical Modelling of the Seismic Response of the Thessaloniki Urban Area: The Case of the 1978 Volvi Earthquake

Systemic Seismic Risk Assessment of Road Networks Considering Interactions with the Built Environment

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