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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 13 (2017): Edición 3 (September 2017)

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

3 Artículos
access type Acceso abierto

POPULATION PERSPECTIVE ON THE SOCIAL IMPACT OF A STRONG EARTHQUAKE AFFECTING BUCHAREST

Publicado en línea: 07 Nov 2017
Páginas: 1 - 9

Resumen

Abstract

The paper presents a series of the results obtained from an extensive questionnaire survey conducted in Bucharest in 2016. The investigated topics are related to earthquake awareness and preparedness of the population currently living in the capital city of Romania, safety concerns and post-earthquake behaviour. Results are interpreted based on several criteria which characterize the target population such as age, education, income, children, as well as the type and year of construction of the building they inhabit. The questionnaire was completed by 1000 respondents and the main findings show that people are generally neither well informed nor prepared for a future major seismic event affecting Bucharest. However, the level of involvement in postearthquake situations is positive, the majority of respondents agreeing to offer humanitarian help in various forms as well as temporary shelter to people, especially relatives or friends.

Palabras clave

  • Earthquake risk perception
  • Bucharest
  • questionnaire
  • awareness
  • Vrancea seismic source
access type Acceso abierto

FLASH-FLOOD MODELLING WITH ARTIFICIAL NEURAL NETWORKS USING RADAR RAINFALL ESTIMATES

Publicado en línea: 07 Nov 2017
Páginas: 10 - 20

Resumen

Abstract

The use of artificial neural networks (ANNs) in modelling the hydrological processes has become a common approach in the last two decades, among side the traditional methods. In regard to the rainfall-runoff modelling, in both traditional and ANN models the use of ground rainfall measurements is prevalent, which can be challenging in areas with low rain gauging station density, especially in catchments where strong focused rainfall can generate flash-floods. The weather radar technology can prove to be a solution for such areas by providing rain estimates with good time and space resolution. This paper presents a comparison between different ANN setups using as input both ground and radar observations for modelling the rainfall-runoff process for Bahluet catchment, with focus on a flash-flood observed in the catchment.

Palabras clave

  • Artificial neural network
  • flash-floods
  • radar rainfall estimates
  • rainfall-runoff modelling
access type Acceso abierto

EVALUATION OF THE POUNDING FORCES DURING EARTHQUAKE USING EXPLICIT DYNAMIC TIME INTEGRATION METHOD

Publicado en línea: 07 Nov 2017
Páginas: 21 - 39

Resumen

Abstract

Pounding effects during earthquake is a subject of high significance for structural engineers performing in the urban areas. In this paper, two ways to account for structural pounding are used in a MATLAB code, namely classical stereomechanics approach and nonlinear viscoelastic impact element. The numerical study is performed on SDOF structures acted by ELCentro recording. While most of the studies available in the literature are related to Newmark implicit time integration method, in this study the equations of motion are numerical integrated using central finite difference method, an explicit method, having the main advantage that in the displacement at the ith+1 step is calculated based on the loads from the ith step. Thus, the collision is checked and the pounding forces are taken into account into the equation of motion in an easier manner than in an implicit integration method. First, a comparison is done using available data in the literature. Both linear and nonlinear behavior of the structures during earthquake is further investigated. Several layout scenarios are also investigated, in which one or more weak buildings are adjacent to a stiffer building. One of the main findings in this paper is related to the behavior of a weak structure located between two stiff structures.

Palabras clave

  • SDOF
  • stereomechanics
  • nonlinear viscoelastic
  • gap
3 Artículos
access type Acceso abierto

POPULATION PERSPECTIVE ON THE SOCIAL IMPACT OF A STRONG EARTHQUAKE AFFECTING BUCHAREST

Publicado en línea: 07 Nov 2017
Páginas: 1 - 9

Resumen

Abstract

The paper presents a series of the results obtained from an extensive questionnaire survey conducted in Bucharest in 2016. The investigated topics are related to earthquake awareness and preparedness of the population currently living in the capital city of Romania, safety concerns and post-earthquake behaviour. Results are interpreted based on several criteria which characterize the target population such as age, education, income, children, as well as the type and year of construction of the building they inhabit. The questionnaire was completed by 1000 respondents and the main findings show that people are generally neither well informed nor prepared for a future major seismic event affecting Bucharest. However, the level of involvement in postearthquake situations is positive, the majority of respondents agreeing to offer humanitarian help in various forms as well as temporary shelter to people, especially relatives or friends.

Palabras clave

  • Earthquake risk perception
  • Bucharest
  • questionnaire
  • awareness
  • Vrancea seismic source
access type Acceso abierto

FLASH-FLOOD MODELLING WITH ARTIFICIAL NEURAL NETWORKS USING RADAR RAINFALL ESTIMATES

Publicado en línea: 07 Nov 2017
Páginas: 10 - 20

Resumen

Abstract

The use of artificial neural networks (ANNs) in modelling the hydrological processes has become a common approach in the last two decades, among side the traditional methods. In regard to the rainfall-runoff modelling, in both traditional and ANN models the use of ground rainfall measurements is prevalent, which can be challenging in areas with low rain gauging station density, especially in catchments where strong focused rainfall can generate flash-floods. The weather radar technology can prove to be a solution for such areas by providing rain estimates with good time and space resolution. This paper presents a comparison between different ANN setups using as input both ground and radar observations for modelling the rainfall-runoff process for Bahluet catchment, with focus on a flash-flood observed in the catchment.

Palabras clave

  • Artificial neural network
  • flash-floods
  • radar rainfall estimates
  • rainfall-runoff modelling
access type Acceso abierto

EVALUATION OF THE POUNDING FORCES DURING EARTHQUAKE USING EXPLICIT DYNAMIC TIME INTEGRATION METHOD

Publicado en línea: 07 Nov 2017
Páginas: 21 - 39

Resumen

Abstract

Pounding effects during earthquake is a subject of high significance for structural engineers performing in the urban areas. In this paper, two ways to account for structural pounding are used in a MATLAB code, namely classical stereomechanics approach and nonlinear viscoelastic impact element. The numerical study is performed on SDOF structures acted by ELCentro recording. While most of the studies available in the literature are related to Newmark implicit time integration method, in this study the equations of motion are numerical integrated using central finite difference method, an explicit method, having the main advantage that in the displacement at the ith+1 step is calculated based on the loads from the ith step. Thus, the collision is checked and the pounding forces are taken into account into the equation of motion in an easier manner than in an implicit integration method. First, a comparison is done using available data in the literature. Both linear and nonlinear behavior of the structures during earthquake is further investigated. Several layout scenarios are also investigated, in which one or more weak buildings are adjacent to a stiffer building. One of the main findings in this paper is related to the behavior of a weak structure located between two stiff structures.

Palabras clave

  • SDOF
  • stereomechanics
  • nonlinear viscoelastic
  • gap

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