HEAD 1.0: A Unified HEllenic Accelerogram Database

Theodulidis, N.; Kalogeras, I.; Papazachos, C. B.; Karastathis, V.; Margaris, Basil; Papaioannou, Ch.; Skarlatoudis, A. A.

doi:10.1785/gssrl.75.1.36

Cited by 35 publications

(14 citation statements)

References 12 publications

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“…Since GMPEs are mainly used for the prediction of seismic damage scenarios, the calibration and validation of the models within the present study were performed using only data relative to events of moment magnitude not less than 4.0. The dataset incorporates the HEAD v1.0 strong‐motion database for the period 1973 to 1999, where however we have excluded all poor‐quality data with low signal‐to‐noise ratio. After 2000, we have used selective data from the permanent network of NOA along with data from the EUROSEISTEST database .…”

Section: Data and Resultsmentioning

confidence: 99%

Regional ground‐motion prediction equations for amplitude‐, frequency response‐, and duration‐based parameters for Greece

Chousianitis

Gaudio

Pierri

et al. 2018

Earthq Engng Struct Dyn

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Summary Although all of the main properties of a ground motion cannot be captured through a single parameter, a number of different engineering parameters has been proposed that are able to reflect either one or more ground‐motion characteristics concurrently. For many of these parameters, especially regarding Greece, there are relatively few or no predictive models. In this context, we present a set of new regionally‐calibrated equations for the prediction of the geometric mean of the horizontal components of 10 amplitude‐, frequency response‐, and duration‐based parameters for shallow crustal earthquakes. These equations supersede previous empirical relationships for Greece since their applicability range for magnitude, and epicentral distance has been extended down to Mw 4 and up to 200 km, respectively, the incorporation of a term accounting for anelastic attenuation has been investigated, while their development was based on a ground‐motion dataset spanning from 1973 to 2014. For all ground‐motion parameters, we provide alternative optimal equations relative to the availability of information on the different explanatory variables. In all velocity‐based and contrary to the acceleration‐based parameters, the anelastic attenuation coefficient was found statistically insignificant when it was combined with the geometric decay and the coefficient accounting for saturation with distance. In the regressions where the geometric decay coefficient simultaneously incorporated the contribution of anelastic attenuation, its increase was found to be much less considerable in the velocity‐based than in the acceleration‐based parameters, implying a stronger effect of anelastic attenuation on the parameters that are defined via the acceleration time history.

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Section: Data and Resultsmentioning

confidence: 99%

Regional ground‐motion prediction equations for amplitude‐, frequency response‐, and duration‐based parameters for Greece

Chousianitis

Gaudio

Pierri

et al. 2018

Earthq Engng Struct Dyn

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“…The dissemination of ISESD and ESMD strong-motion databases was followed by important national and international strong-motion and seismic hazard projects in Europe and surrounding regions. Among these projects, the ITalian Theodulidis et al 2004) are national efforts to compile, process and archive local (national) accelerometric data using state-of-the-art techniques. Figures 12.4a,b show the magnitude vs. distance scatters of ITACA 5 and T-NSMP databases as of the day they are released.…”

Section: Evolution Of Major Strong-motion Databases In the Broader Eumentioning

confidence: 99%

Developments in Ground Motion Predictive Models and Accelerometric Data Archiving in the Broader European Region

Akkar

Kale

2015

Perspectives on European Earthquake Engineering and Seismology

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This paper summarizes the evolution of major strong-motion databases and ground-motion prediction equations (GMPEs) for shallow active crustal regions (SACRs) in Europe and surrounding regions. It concludes with some case studies to show the sensitivity of hazard results at different seismicity levels and exceedance rates for local (developed from country-specific databases) and global (based on databases of multiple countries) GMPEs of the same region. The case studies are enriched by considering other global GMPEs of SACRs that are recently developed in the USA. The hazard estimates computed from local and global GMPEs from the broader Europe as well as those obtained from global GMPEs developed in the US differ. These differences are generally significant and their variation depends on the annual exceedance rate and seismicity. Current efforts to improve the accelerometric data archives in the broader Europe as well as more refined GMPEs that will be developed from these databases would help the researchers to understand the above mentioned differences in seismic hazard.

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“…Each used accelerogram is compatible (for equivalent viscous ratio damping 0.05) with the respective design elastic response spectrum that is proposed by Eurocode EN 1998-1 for soil category D. The two accelerograms of each pair are practically uncorrelated between them and act simultaneously. Moreover, each accelerogram has many of the characteristic properties of the Hellenic earthquakes, according to the database of the Hellenic earthquake records [28].…”

Section: Modelling Of the Seismic Excitationmentioning

confidence: 99%

“…10) is richer than the frequency content of the natural elastic response spectra. Moreover, these artificial accelerograms possess adequate strong motion duration, adequate number of significant dynamic loading cycles, as well as adequate Arias Intensity according to Hellenic strong earthquakes [28].…”

Section: Modelling Of the Seismic Excitationmentioning

confidence: 99%

Numerical Investigation of Seismic Behavior of Spatial Asymmetric Multi- Storey Reinforced Concrete Buildings with Masonry Infill Walls

Makarios¹

2012

TOBCTJ

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Abstract:In order to insure the validity of the seismic performance matrix of the Eurocode EN 1998 for irregular in-plan, torsionally-flexible, spatial, asymmetric, multi-storey reinforced concrete (r/c) buildings with masonry infill walls, an extended parametric numerical investigation has been performed, using non-linear response-history analysis. For this purpose, N representative asymmetric r/c buildings with torsional sensitivity, have been designed according to Eurocodes EN 1990, EN 1992 and EN 1998, for Ductility Class High (DCH), using design global behavior factor q equal to 3.00. Each of the masonry infill walls has been modeled with two nonlinear diagonal bars with hinges at their two ends and with onesided behavior (in compression only). Three seismic levels of the seismic action have been considered with mean return period of 2475, 475 and 275 years, respectively. The above three earthquakes have been used for validity check of the states of "Near Collapse", "Significant Damage" and "Damage Limitation", respectively. In order to apply the non-linear response-history analysis, suitable artificial accelerograms, which are compatible with the elastic response spectrum, for soil category D, of Eurocode EN 1998-1 on the one hand and with Hellenic geological and site-specific data on the other hand, have been used. In the present paper, important guidance on modelling plastic hinges and the masonry infill walls is presented, as well as, a numerical example of a three-storey r/c building is also presented for illustrative purposes Keywords: Inelastic static seismic analysis, non-linear response-history analysis, asymmetric multi-storey building, torsionally-flexible multi-storey building, masonry infill walls, simulation of plastic hinge properties.

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HEAD 1.0: A Unified HEllenic Accelerogram Database

Cited by 35 publications

References 12 publications

Regional ground‐motion prediction equations for amplitude‐, frequency response‐, and duration‐based parameters for Greece

Regional ground‐motion prediction equations for amplitude‐, frequency response‐, and duration‐based parameters for Greece

Developments in Ground Motion Predictive Models and Accelerometric Data Archiving in the Broader European Region

Numerical Investigation of Seismic Behavior of Spatial Asymmetric Multi- Storey Reinforced Concrete Buildings with Masonry Infill Walls

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