Springer Proceedings in Earth and Environmental Sciences
The construction industry, as a main energy consumer and a foremost contributor to greenhouse gas... more The construction industry, as a main energy consumer and a foremost contributor to greenhouse gas emissions, has been undergoing a “green revolution” in the recent years. Sustainability has become a prominent issue, therefore a framework for including energy efficiency and sustainability in the design of buildings is badly needed. Sustainability is the core of the European Renovation Wave strategy and of the New European Bauhaus initiative.A design approach, named SAFESUST (SAFEty and SUSTainability) has been proposed at the Joint Research Centre of the European Commission, able to address at the same time structural safety, energy and environmental performances. The output of this approach is a unique parameter, expressed in monetary terms, which helps in identifying the most appropriate design solution.More recently, the Joint Research Centre, under mandate of the European Parliament, has activated a European Pilot Project named “Integrated techniques for the seismic strengthening...
Strong earthquakes in the Romanian Vrancea area have caused a high toll of casualties and extensi... more Strong earthquakes in the Romanian Vrancea area have caused a high toll of casualties and extensive damage over the last centuries. The average recurrence rates make another strong event within the next 2 decades highly probable and provide a challenge to mitigate its impact. Romanian and German scientists from various fields (geology, seismology, civil engineering, operation research) organized themselves in the Collaborative Research Center (CRC) 461 'Strong Earthquakes: A Challenge for Geosciences and Civil Engineering' (Germany) and the Romanian Group for Strong Vrancea Earthquakes (RGVE) in a multidisciplinary attempt towards earthquake mitigation [17]. Key objectives of joint research activities are: • Understanding of the tectonic processes that are responsible for the strong intermediate depth seismicity beneath Vrancea. • Developing realistic models and predictions of ground motion. • Development of damage projections for the inner city of Bucharest based on seismological data, quantification of site effects and analysis of the built environment. • Detailed experimental study of the entire sequence relevant in earthquake engineering: source physics, wave propagation, site effects, soil-structure interaction, building performance. The Multidisciplinary Seismic Test Site located at INCERC, in the Eastern part of Bucharest serves as a focus to verify theoretical predictions by experimental data. Non-linear soil behaviour is a key issue in this context. • Development of novel approaches for mitigation of earthquake risk such as dynamic disaster management, new techniques for rescue and retrieval, retrofitting with fiber glass materials, rapid assessment of damage with photogrammetric methods and post-event shake maps.
In this paper we present a new statistical model for the Gutenberg-Richter magnitude of eartquake... more In this paper we present a new statistical model for the Gutenberg-Richter magnitude of eartquakes occuring in the Vrancea fault line in Romania. Mean return periods of Vrancea earthquakes are up till now calculated with statistical models of earthquake data from the last century. However, a very extensive historical research has been undertaken by Radu et al to investigate the occurences of earthquakes in Romania in the period 984-1900. This information hasn’t been included in the statistical models for Gutenberg-Richter magnitudes versus occurence frequency so far. In this paper new calculations will be presented to include this historical data in the current models by use of a Bayesian modeling approach. This approach has proven to be succesful in a similar problem regarding historical sea floods in the low lying country of the Netherlands.
This paper provides an overview of wind observations in Romania with historical data, particularl... more This paper provides an overview of wind observations in Romania with historical data, particularly after the establishment of the national meteorological network in 1884. Data on wind directions and velocities is presented, focusing on a sample of fourteen cities including the capital Bucharest. The historical evolution of national zonation maps for wind pressure is shown. A statistical description of the maximum annual wind velocity data is also presented.
This article presents a new generation of empirical ground motion models for the prediction of re... more This article presents a new generation of empirical ground motion models for the prediction of response spectral accelerations in soil conditions, specifically developed for the Vrancea intermediate-depth seismic source. The strong ground motion database from which the ground motion prediction model is derived consists of over 800 horizontal components of acceleration recorded from nine Vrancea intermediate-depth seismic events as well as from other seventeen intermediate-depth earthquakes produced in other seismically active regions in the world. Among the main features of the new ground motion model are the prediction of spectral ordinates values (besides the prediction of the peak ground acceleration), the extension of the magnitudes range applicability, the use of consistent metiics (epicentral distance) for this type of seismic source, the extension of the distance range applicabihty to 300 km, the partition of total standard deviation in infra-and inter-event standard deviations and the use of a national strong ground motion database more than two times larger than in the previous studies. The results suggest that this model is an improvement of the previous generation of ground motion prediction models and can be properly employed in the analysis ofthe seismic hazard of Romania.
Advances in Natural and Technological Hazards Research, 1999
The free-field accelerograms from Republic of Moldova come from four seismic stations in Kishinev... more The free-field accelerograms from Republic of Moldova come from four seismic stations in Kishinev, capital of Republic of Moldova, as well as from other two stations: Kahul, near the Romanian border (≈46° lat.N), and Krasnogorka, 60 km from Kishinev.
IPCC 94 Proceedings. Scaling New Heights in Technical Communication
Discusses the impact of multimedia technology on the technical communication profession. The auth... more Discusses the impact of multimedia technology on the technical communication profession. The authors maintain that the introduction of this technology necessitates organizational changes in the technical communication environment at the same time that it creates new opportunities for professional development. They emphasize that success in this new environment depends to a large extent on the adoption of a thoroughly professional
... un sol alluvionnaire. Le zonage de l'aléa sismique en Roumanie basé sur une anal... more ... un sol alluvionnaire. Le zonage de l'aléa sismique en Roumanie basé sur une analyse probabiliste et le microzonage des effets de site à Bucarest sont des priorités pour la recherche en génie parasismique. La nécessité de ...
ABSTRACT This article focuses on bi-normalized response spectra for recorded strong ground motion... more ABSTRACT This article focuses on bi-normalized response spectra for recorded strong ground motions with various frequency contents. The bi-normalized response spectrum introduced in Xu and Xie [2004] is obtained by dividing the spectral response by the corresponding peak parameter and by dividing the vibration period of the SDOF by a frequency content-related parameter. More than 100 seismic motions recorded in 17 countries in the past 70 years are analyzed. The ground motions are classified into several categories according to: (a) the peak ground acceleration PGA and (b) the control period TC of the response spectra or the mean period, TM. The analyses performed on bi-normalized response spectra aim at highlighting the differences between the various categories of strong ground motions. The influence of the peak ground acceleration and of the frequency content on the bi-normalized response spectra is emphasized. This article also compares the computed spectra with the elastic response spectra given in EN 1998-1. It can be concluded that the bi-normalized response spectra could be used in seismic design codes and that the design spectra from EN 1998-1 should be re-shaped for the near-field region (due to the limited database).
The paper presents the probabilistic seismic hazard analysis used for constructing the actual sei... more The paper presents the probabilistic seismic hazard analysis used for constructing the actual seismic hazard map of Romania. The new edition of the code for design of earthquake-resistant buildings and structures in Romania P100 was just issued in 2006 and follows the format and contents of Eurocode 8. Based on the available data obtained from more than 400 boreholes and using the GIS techniques, significant soil parameters were mapped for the territory of city of Bucharest and will allow seismic microzonation of Bucharest to be used as a tool for urban planning and earthquake risk reduction. The paper also explains the synergy between national programs and international projects as:
Reference : FP6 PROHITECH project: Volume 6: Seismic protection of historical buildings: applicat... more Reference : FP6 PROHITECH project: Volume 6: Seismic protection of historical buildings: application... ... Books : Book published as author, translator, etc. ... Jaspart, Jean-Pierre mailto [Université de Liège - ULg > Département Argenco : Secteur MS2F > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon. >] ... There is no file associated with this reference. ... All documents in ORBi are protected by a user license.
Résumé/Abstract Attenuation relations for Vrancea intermediate depth foci in Romania were obtaine... more Résumé/Abstract Attenuation relations for Vrancea intermediate depth foci in Romania were obtained through non-linear multi-regression of the peak parameters of ground motions. A Joyner-Boore model was applied to a data base of more than 300 records from 4 Vrancea ...
Springer Proceedings in Earth and Environmental Sciences
The construction industry, as a main energy consumer and a foremost contributor to greenhouse gas... more The construction industry, as a main energy consumer and a foremost contributor to greenhouse gas emissions, has been undergoing a “green revolution” in the recent years. Sustainability has become a prominent issue, therefore a framework for including energy efficiency and sustainability in the design of buildings is badly needed. Sustainability is the core of the European Renovation Wave strategy and of the New European Bauhaus initiative.A design approach, named SAFESUST (SAFEty and SUSTainability) has been proposed at the Joint Research Centre of the European Commission, able to address at the same time structural safety, energy and environmental performances. The output of this approach is a unique parameter, expressed in monetary terms, which helps in identifying the most appropriate design solution.More recently, the Joint Research Centre, under mandate of the European Parliament, has activated a European Pilot Project named “Integrated techniques for the seismic strengthening...
Strong earthquakes in the Romanian Vrancea area have caused a high toll of casualties and extensi... more Strong earthquakes in the Romanian Vrancea area have caused a high toll of casualties and extensive damage over the last centuries. The average recurrence rates make another strong event within the next 2 decades highly probable and provide a challenge to mitigate its impact. Romanian and German scientists from various fields (geology, seismology, civil engineering, operation research) organized themselves in the Collaborative Research Center (CRC) 461 'Strong Earthquakes: A Challenge for Geosciences and Civil Engineering' (Germany) and the Romanian Group for Strong Vrancea Earthquakes (RGVE) in a multidisciplinary attempt towards earthquake mitigation [17]. Key objectives of joint research activities are: • Understanding of the tectonic processes that are responsible for the strong intermediate depth seismicity beneath Vrancea. • Developing realistic models and predictions of ground motion. • Development of damage projections for the inner city of Bucharest based on seismological data, quantification of site effects and analysis of the built environment. • Detailed experimental study of the entire sequence relevant in earthquake engineering: source physics, wave propagation, site effects, soil-structure interaction, building performance. The Multidisciplinary Seismic Test Site located at INCERC, in the Eastern part of Bucharest serves as a focus to verify theoretical predictions by experimental data. Non-linear soil behaviour is a key issue in this context. • Development of novel approaches for mitigation of earthquake risk such as dynamic disaster management, new techniques for rescue and retrieval, retrofitting with fiber glass materials, rapid assessment of damage with photogrammetric methods and post-event shake maps.
In this paper we present a new statistical model for the Gutenberg-Richter magnitude of eartquake... more In this paper we present a new statistical model for the Gutenberg-Richter magnitude of eartquakes occuring in the Vrancea fault line in Romania. Mean return periods of Vrancea earthquakes are up till now calculated with statistical models of earthquake data from the last century. However, a very extensive historical research has been undertaken by Radu et al to investigate the occurences of earthquakes in Romania in the period 984-1900. This information hasn’t been included in the statistical models for Gutenberg-Richter magnitudes versus occurence frequency so far. In this paper new calculations will be presented to include this historical data in the current models by use of a Bayesian modeling approach. This approach has proven to be succesful in a similar problem regarding historical sea floods in the low lying country of the Netherlands.
This paper provides an overview of wind observations in Romania with historical data, particularl... more This paper provides an overview of wind observations in Romania with historical data, particularly after the establishment of the national meteorological network in 1884. Data on wind directions and velocities is presented, focusing on a sample of fourteen cities including the capital Bucharest. The historical evolution of national zonation maps for wind pressure is shown. A statistical description of the maximum annual wind velocity data is also presented.
This article presents a new generation of empirical ground motion models for the prediction of re... more This article presents a new generation of empirical ground motion models for the prediction of response spectral accelerations in soil conditions, specifically developed for the Vrancea intermediate-depth seismic source. The strong ground motion database from which the ground motion prediction model is derived consists of over 800 horizontal components of acceleration recorded from nine Vrancea intermediate-depth seismic events as well as from other seventeen intermediate-depth earthquakes produced in other seismically active regions in the world. Among the main features of the new ground motion model are the prediction of spectral ordinates values (besides the prediction of the peak ground acceleration), the extension of the magnitudes range applicability, the use of consistent metiics (epicentral distance) for this type of seismic source, the extension of the distance range applicabihty to 300 km, the partition of total standard deviation in infra-and inter-event standard deviations and the use of a national strong ground motion database more than two times larger than in the previous studies. The results suggest that this model is an improvement of the previous generation of ground motion prediction models and can be properly employed in the analysis ofthe seismic hazard of Romania.
Advances in Natural and Technological Hazards Research, 1999
The free-field accelerograms from Republic of Moldova come from four seismic stations in Kishinev... more The free-field accelerograms from Republic of Moldova come from four seismic stations in Kishinev, capital of Republic of Moldova, as well as from other two stations: Kahul, near the Romanian border (≈46° lat.N), and Krasnogorka, 60 km from Kishinev.
IPCC 94 Proceedings. Scaling New Heights in Technical Communication
Discusses the impact of multimedia technology on the technical communication profession. The auth... more Discusses the impact of multimedia technology on the technical communication profession. The authors maintain that the introduction of this technology necessitates organizational changes in the technical communication environment at the same time that it creates new opportunities for professional development. They emphasize that success in this new environment depends to a large extent on the adoption of a thoroughly professional
... un sol alluvionnaire. Le zonage de l'aléa sismique en Roumanie basé sur une anal... more ... un sol alluvionnaire. Le zonage de l'aléa sismique en Roumanie basé sur une analyse probabiliste et le microzonage des effets de site à Bucarest sont des priorités pour la recherche en génie parasismique. La nécessité de ...
ABSTRACT This article focuses on bi-normalized response spectra for recorded strong ground motion... more ABSTRACT This article focuses on bi-normalized response spectra for recorded strong ground motions with various frequency contents. The bi-normalized response spectrum introduced in Xu and Xie [2004] is obtained by dividing the spectral response by the corresponding peak parameter and by dividing the vibration period of the SDOF by a frequency content-related parameter. More than 100 seismic motions recorded in 17 countries in the past 70 years are analyzed. The ground motions are classified into several categories according to: (a) the peak ground acceleration PGA and (b) the control period TC of the response spectra or the mean period, TM. The analyses performed on bi-normalized response spectra aim at highlighting the differences between the various categories of strong ground motions. The influence of the peak ground acceleration and of the frequency content on the bi-normalized response spectra is emphasized. This article also compares the computed spectra with the elastic response spectra given in EN 1998-1. It can be concluded that the bi-normalized response spectra could be used in seismic design codes and that the design spectra from EN 1998-1 should be re-shaped for the near-field region (due to the limited database).
The paper presents the probabilistic seismic hazard analysis used for constructing the actual sei... more The paper presents the probabilistic seismic hazard analysis used for constructing the actual seismic hazard map of Romania. The new edition of the code for design of earthquake-resistant buildings and structures in Romania P100 was just issued in 2006 and follows the format and contents of Eurocode 8. Based on the available data obtained from more than 400 boreholes and using the GIS techniques, significant soil parameters were mapped for the territory of city of Bucharest and will allow seismic microzonation of Bucharest to be used as a tool for urban planning and earthquake risk reduction. The paper also explains the synergy between national programs and international projects as:
Reference : FP6 PROHITECH project: Volume 6: Seismic protection of historical buildings: applicat... more Reference : FP6 PROHITECH project: Volume 6: Seismic protection of historical buildings: application... ... Books : Book published as author, translator, etc. ... Jaspart, Jean-Pierre mailto [Université de Liège - ULg > Département Argenco : Secteur MS2F > Adéquat. struct. aux exig. de fonct.& perfor. techn.-écon. >] ... There is no file associated with this reference. ... All documents in ORBi are protected by a user license.
Résumé/Abstract Attenuation relations for Vrancea intermediate depth foci in Romania were obtaine... more Résumé/Abstract Attenuation relations for Vrancea intermediate depth foci in Romania were obtained through non-linear multi-regression of the peak parameters of ground motions. A Joyner-Boore model was applied to a data base of more than 300 records from 4 Vrancea ...
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