Derivation of design soil coefficients (S) and response spectral shapes for Eurocode 8 using the European Strong-Motion Database   总被引：1，自引：0，他引：1  

Julien Rey  Ezio Faccioli  Julian J. Bommer 《Journal of Seismology》2002,6(4):547-555

A revision is presently under way to upgrade the status of the `Designrecommendations for earthquake resistance of structures', commonlyreferred to as Eurocode 8 (or EC8). In order to improve the definition ofthe design elastic response spectra (ERS) as defined in the Eurocode 8 –Part 1 (Draft May 2001), the values of the soil amplification factors havebeen calculated for sites on sedimentary soils, both stiff (category B) andsoft (category C), with respect to rock sites (category A), such ascontemplated in EC8. The work was performed by a systematic study ofresponse spectra as a function of magnitude and site conditions, usingrecords from the European Strong-Motion Database.The results confirm the occurrence of systematic spectral amplification onsedimentary soils with respect to reference rock in a large set of Europeanstrong motion data. Such amplification has been quantified through ameasure derived from the Housner Spectrum Intensity definition.The values of the soil coefficients recommended in the current version ofEC 8 are shown to be realistic for category C, in the case of a moderateseismicity context. However the values for subsoil class B need to besignificantly increased both for the moderate and high seismicity context.  相似文献   

Comparative Study of the Seismic Hazard Assessments in European National Seismic Codes   总被引：1，自引：0，他引：1  

Julián García-Mayordomo  Ezio Faccioli  Roberto Paolucci 《Bulletin of Earthquake Engineering》2004,2(1):51-73

  相似文献   

On the reliability of long‐period response spectral ordinates from digital accelerograms     

Roberto Paolucci  Antonio Rovelli  Ezio Faccioli  Carlo Cauzzi  Daniela Finazzi  Manuela Vanini  Carola Di Alessandro  Giovanna Calderoni 《地震工程与结构动力学》2008,37(5):697-710

Using records from co‐located broadband and digital strong motion (SM) instruments, it is first shown that the displacement waveforms obtained by double integration of the accelerogram need not be free of unrealistic baseline drift to yield reliable spectral ordinates up to at least 10 s. Secondly, to provide objective criteria for selecting reliable digital SM records for ground motion predictions at long periods, a set of synthetic accelerograms contaminated by random long‐period noise has been used, and the difference between the original accelerograms and the spurious ones in terms of response spectra has been quantified, by introducing a noise index that can be easily calculated based on the velocity waveform of the record. The results of this study suggest that high‐pass filtering the digital acceleration record from a cutoff period selected to suppress baseline drifts on the displacement waveform appears to be in most cases too conservative and unduly depletes reliable information on long‐period spectral ordinates. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

Guest Editorial     

Ezio Faccioli 《Journal of Seismology》1999,3(3):211-212

  相似文献   

Effects of 2,4,6-trinitrotoluene (TNT) on phase I and phase II biotransformation enzymes in European eel Anguilla anguilla (Linnaeus, 1758)     

Della Torre C  Corsi I  Arukwe A  Alcaro L  Amato E  Focardi S 《Marine environmental research》2008,66(1):9-11

  相似文献   

The Frontier Mountain meteorite trap (Antarctica)     

Luigi FOLCO  Alessandro CAPRA  Massimo CHIAPPINI  Mssimo FREZZOTTI  Marcello MELLINI  Ignazio Ezio TABACCO 《Meteoritics & planetary science》2002,37(2):209-228

  相似文献   

Evidence for a massive dark object in NGC 4350     

Ezio Pignatelli  Paolo Salucci  Luigi Danese 《Monthly notices of the Royal Astronomical Society》2001,320(1):124-130

In this work we build a detailed dynamic model for an S0 galaxy possibly hosting a central massive dark object (MDO). We show that the photometric profiles and the kinematics along the major and minor axes, including the h ₃ and h ₄ profiles, imply the presence of a central MDO of mass     i.e. 0.3–2.8 per cent of the mass derived for the stellar spheroidal component. Models without MDO are unable to reproduce the kinematic properties of the inner stars and of the rapidly rotating nuclear gas.
The stellar population consists of an exponential disc (27 per cent of the light) and a diffuse spheroidal component (73 per cent of the light) that cannot be represented by a simple de Vaucouleurs profile at any radius. The M L ratios we found for the stellar components (3.3 and 6.6 respectively) are typical of those of disc and elliptical galaxies.  相似文献   

Editorial     

Ezio Faccioli 《Journal of Seismology》2001,5(1):5-6

Editorial Board

Editorial  相似文献   

Engineering assessment of seismic hazard and long period ground motions at the Bolu Viaduct Site following the November 1999 earthquake     

Ezio Faccioli  Roberto Paolucci  Vera Pessina 《Journal of Seismology》2002,6(3):307-327

The M_w 7.1 earthquake of November 12, 1999 severely damageda 2.5 km long viaduct on a stretch under construction of theIstanbul-Ankara motorway, 18 km W of Bolu. The fault rupture crossedthe viaduct with an observed offset close to 1.5 m; the viaduct decksuffered large permanent displacements but did not collapse.Seismic hazard at the site appears to be governed by characteristicearthquakes occurring every few hundred years both on the Düzce faultand on the main stretch of North Anatolian fault (NAF). Smaller activefaults near the site also contribute to the hazard.We investigate how a reliable design response spectrum of displacement canbe constructed for the viaduct site using both probabilistic and deterministictools. After checking the applicability of known attenuation relations againstrecorded data, we illustrate a hazard analysis that incorporates acharacteristic earthquake model for the relevant faults, and accounts forstatistical directivity effects on the Düzce fault. Constant-risk responsespectra up to 3 s are thus obtained for different return periods. Syntheticmotions at the site are generated next, using a known source model, inorder to explore the features of the displacement response spectrum atvibration periods in the range between 1s and 6 s, in which the dominantresponse of the viaduct deck, uncoupled from the piers, occurs. Adiscussion of results follows.  相似文献   

An index for measuring the effects of topography on seismic ground motion intensity     

Francisco J. Snchez-sesma  Ezio Faccioli  Roberto Fregonese 《地震工程与结构动力学》1986,14(5):719-731

An index is proposed for the quantitative evaluation of topographical effects, as may be required in seismic microzoning and structural design applications. This topographical effects index (TEI) is defined as the relative Arias intensity for a given position. As an example, the TEI is calculated for a semicircular canyon excited by an earthquake signal that consists of plane elastic SH waves and is characterized by a theoretical spectrum of accelerations. The analytical solution by Trifunac¹⁵ provides the transfer functions for this problem. The behaviour and spacial distribution of the calculated TEI values are illustrated for different incidence angles and spectral parameters. The proposed index appears useful for generating quantitative criteria which, after proper confirmation by instrumental recordings, could be considered in earthquake code provisions.  相似文献