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Detalles de la revista
Formato
Revista
eISSN
2784-1391
Publicado por primera vez
12 Apr 2013
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

Volumen 11 (2015): Edición 1 (March 2015)

Detalles de la revista
Formato
Revista
eISSN
2784-1391
Publicado por primera vez
12 Apr 2013
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

5 Artículos
access type Acceso abierto

Recent Vs. Historical Seismicity Analysis For Banat Seismic Region (Western Part Of Romania)

Publicado en línea: 16 May 2015
Páginas: 1 - 10

Resumen

Abstract

The present day seismic activity from a region reflects the active tectonics and can confirm the seismic potential of the seismogenic sources as they are modelled using the historical seismicity. This paper makes a comparative analysis of the last decade seismicity recorded in the Banat Seismic Region (western part of Romania) and the historical seismicity of the region (Mw≥4.0). Four significant earthquake sequences have been recently localized in the region, three of them nearby the city of Timisoara (January 2012 and March 2013) and the fourth within Hateg Basin, South Carpathians (October 2013). These sequences occurred within the epicentral areas of some strong historical earthquakes (Mw≥5.0). The main events had some macroseismic effects on people up to some few kilometers from the epicenters. Our results update the Romanian earthquakes catalogue and bring new information along the local seismic hazard sources models and seismotectonics.

Palabras clave

  • seismicity
  • magnitude
  • macroseismic intensities
  • seismotectonics
  • seismic hazard
access type Acceso abierto

Characteristics And Results Of The Near Real-Time System For Estimating The Seismic Damage In Romania

Publicado en línea: 16 May 2015
Páginas: 11 - 19

Resumen

Abstract

The Near Real-Time System for Estimating the Seismic Damage in Romania, implemented in 2012 at the National Institute for Earth Physics, is one of the automated systems that can directly contribute to saving many lives right after a major earthquake, by translating earthquake parameters into damage probabilities for different areas within Romanian counties and showing emergency intervention necessities, and can also lead to mitigation actions before an earthquake, through raising awareness and highlighting vulnerable aspects of the building stock and economic and social impacts.

This paper aims to present the scientific background of this constantly upgrading system, and to show different results for relevant scenarios, for intermediate-depth Vrancea earthquakes and other crustal earthquakes. Several important questions are tried to be answered, like: “How credible are the estimated losses?”, “What are the most vulnerable aspects?” or “How can the damage maps be useful for authorities?”.

Currently, the system uses for building loss estimation the analytical methods (as the Improved-Displacement Capacity Method - I-DCM) implemented within the open-source software SELENA (SEismic Loss EstimatioN using a logic tree Approach), together with HAZUS methods for estimating the human casualties. The building stock is defined through 48 different capacity and fragility curves, depending on construction material, height and age. As hazard data, PGA and SA values obtained through the ShakeMap System and based on real recordings and attenuation relations are used. The area currently analyzed by the system consists of 19 Romanian Counties, capital Bucharest and 9 regions in northern Bulgaria; resolution of the data is at administrative unit (commune or city) level. We aim to provide an insight of each part of this system, justify the choices made and also discuss the improvement possibilities.

Palabras clave

  • loss assessment
  • seismic risk
  • SELENA
access type Acceso abierto

A Three-Dimensional Analysis Of The Wheel - Railway Contact In Case Of A Charge Transfer

Publicado en línea: 16 May 2015
Páginas: 20 - 28

Resumen

Abstract

A series of factors are acting are acting on the wheels of the railway vehicle causing load transfers capable of having an effect on safety transportation The evaluation of vehicle – runway interaction phenomena establishes traffic safety conditions. In this paper we present a three-dimensional approach of the wheel - railway contact in case of load transfer and for a path with shortfall or with profile S78 super-elevation excess. The vehicle – runway interaction phenomena establishes traffic safety conditions. In this paper we present a three-dimensional approach of the wheel - railway contact in case of load transfer and for a path with shortfall or with profile S78 super-elevation excess is analyzed.

Palabras clave

  • contact ellipse
  • sliding/adherence area
  • contact forces
  • safety against derailment
access type Acceso abierto

Analysis Of Masonry Infilled RC Frame Structures Under Lateral Loading

Publicado en línea: 16 May 2015
Páginas: 29 - 39

Resumen

Abstract

Partition walls are often made of masonry in Romania. Although they are usually considered non-structural elements in the case of reinforced concrete framed structures, the infill panels contribute significantly to the seismic behaviour of the building. Their impact is difficult to assess, mainly because the interaction between the bounding frame and the infill is an intricate issue. This paper analyses the structural behaviour of a masonry infilled reinforced concrete frame system subjected to in - plane loading. Three numerical models are proposed and their results are compared in terms of stiffness and strength of the structure. The role of the openings in the infill panel on the behaviour is analysed and discussed. The effect of gaps between the frame and the infill on the structural behaviour is also investigated. Comparisons are made with the in-force Romanian and European regulations provisions.

Palabras clave

  • numerical modelling
  • in-plane deformation
  • gap
  • diagonal strut
  • openings
access type Acceso abierto

Evaluation Of Bucharest Soil Liquefaction Potential

Publicado en línea: 16 May 2015
Páginas: 40 - 48

Resumen

Abstract

The paper contains the experimental research performed in Bucharest like the borehole data (Standard Penetration Test) and the data obtained from seismic investigations (down-hole prospecting and surface-wave methods). The evaluation of the soils liquefaction resistance based on the results of the SPT, down-hole prospecting and surface-wave method tests and the use of the earthquake records will be presented.

Palabras clave

  • Bucharest
  • liquefaction
  • SPT
  • seismic prospecting
5 Artículos
access type Acceso abierto

Recent Vs. Historical Seismicity Analysis For Banat Seismic Region (Western Part Of Romania)

Publicado en línea: 16 May 2015
Páginas: 1 - 10

Resumen

Abstract

The present day seismic activity from a region reflects the active tectonics and can confirm the seismic potential of the seismogenic sources as they are modelled using the historical seismicity. This paper makes a comparative analysis of the last decade seismicity recorded in the Banat Seismic Region (western part of Romania) and the historical seismicity of the region (Mw≥4.0). Four significant earthquake sequences have been recently localized in the region, three of them nearby the city of Timisoara (January 2012 and March 2013) and the fourth within Hateg Basin, South Carpathians (October 2013). These sequences occurred within the epicentral areas of some strong historical earthquakes (Mw≥5.0). The main events had some macroseismic effects on people up to some few kilometers from the epicenters. Our results update the Romanian earthquakes catalogue and bring new information along the local seismic hazard sources models and seismotectonics.

Palabras clave

  • seismicity
  • magnitude
  • macroseismic intensities
  • seismotectonics
  • seismic hazard
access type Acceso abierto

Characteristics And Results Of The Near Real-Time System For Estimating The Seismic Damage In Romania

Publicado en línea: 16 May 2015
Páginas: 11 - 19

Resumen

Abstract

The Near Real-Time System for Estimating the Seismic Damage in Romania, implemented in 2012 at the National Institute for Earth Physics, is one of the automated systems that can directly contribute to saving many lives right after a major earthquake, by translating earthquake parameters into damage probabilities for different areas within Romanian counties and showing emergency intervention necessities, and can also lead to mitigation actions before an earthquake, through raising awareness and highlighting vulnerable aspects of the building stock and economic and social impacts.

This paper aims to present the scientific background of this constantly upgrading system, and to show different results for relevant scenarios, for intermediate-depth Vrancea earthquakes and other crustal earthquakes. Several important questions are tried to be answered, like: “How credible are the estimated losses?”, “What are the most vulnerable aspects?” or “How can the damage maps be useful for authorities?”.

Currently, the system uses for building loss estimation the analytical methods (as the Improved-Displacement Capacity Method - I-DCM) implemented within the open-source software SELENA (SEismic Loss EstimatioN using a logic tree Approach), together with HAZUS methods for estimating the human casualties. The building stock is defined through 48 different capacity and fragility curves, depending on construction material, height and age. As hazard data, PGA and SA values obtained through the ShakeMap System and based on real recordings and attenuation relations are used. The area currently analyzed by the system consists of 19 Romanian Counties, capital Bucharest and 9 regions in northern Bulgaria; resolution of the data is at administrative unit (commune or city) level. We aim to provide an insight of each part of this system, justify the choices made and also discuss the improvement possibilities.

Palabras clave

  • loss assessment
  • seismic risk
  • SELENA
access type Acceso abierto

A Three-Dimensional Analysis Of The Wheel - Railway Contact In Case Of A Charge Transfer

Publicado en línea: 16 May 2015
Páginas: 20 - 28

Resumen

Abstract

A series of factors are acting are acting on the wheels of the railway vehicle causing load transfers capable of having an effect on safety transportation The evaluation of vehicle – runway interaction phenomena establishes traffic safety conditions. In this paper we present a three-dimensional approach of the wheel - railway contact in case of load transfer and for a path with shortfall or with profile S78 super-elevation excess. The vehicle – runway interaction phenomena establishes traffic safety conditions. In this paper we present a three-dimensional approach of the wheel - railway contact in case of load transfer and for a path with shortfall or with profile S78 super-elevation excess is analyzed.

Palabras clave

  • contact ellipse
  • sliding/adherence area
  • contact forces
  • safety against derailment
access type Acceso abierto

Analysis Of Masonry Infilled RC Frame Structures Under Lateral Loading

Publicado en línea: 16 May 2015
Páginas: 29 - 39

Resumen

Abstract

Partition walls are often made of masonry in Romania. Although they are usually considered non-structural elements in the case of reinforced concrete framed structures, the infill panels contribute significantly to the seismic behaviour of the building. Their impact is difficult to assess, mainly because the interaction between the bounding frame and the infill is an intricate issue. This paper analyses the structural behaviour of a masonry infilled reinforced concrete frame system subjected to in - plane loading. Three numerical models are proposed and their results are compared in terms of stiffness and strength of the structure. The role of the openings in the infill panel on the behaviour is analysed and discussed. The effect of gaps between the frame and the infill on the structural behaviour is also investigated. Comparisons are made with the in-force Romanian and European regulations provisions.

Palabras clave

  • numerical modelling
  • in-plane deformation
  • gap
  • diagonal strut
  • openings
access type Acceso abierto

Evaluation Of Bucharest Soil Liquefaction Potential

Publicado en línea: 16 May 2015
Páginas: 40 - 48

Resumen

Abstract

The paper contains the experimental research performed in Bucharest like the borehole data (Standard Penetration Test) and the data obtained from seismic investigations (down-hole prospecting and surface-wave methods). The evaluation of the soils liquefaction resistance based on the results of the SPT, down-hole prospecting and surface-wave method tests and the use of the earthquake records will be presented.

Palabras clave

  • Bucharest
  • liquefaction
  • SPT
  • seismic prospecting

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