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Détails du magazine
Format
Magazine
eISSN
2784-1391
Première publication
12 Apr 2013
Période de publication
4 fois par an
Langues
Anglais

Chercher

Volume 12 (2016): Edition 3 (September 2016)

Détails du magazine
Format
Magazine
eISSN
2784-1391
Première publication
12 Apr 2013
Période de publication
4 fois par an
Langues
Anglais

Chercher

4 Articles
access type Accès libre

The Comparative Analysis of Hydrodynamic Pressures in Cylindrical Tanks

Publié en ligne: 24 Oct 2016
Pages: 1 - 12

Résumé

Abstract

This article presents a comparative study of the values of hydrodynamic pressure and their resultants occurred during the seismic action using P100-1/2013 technical rules and the relations defined in the papers: [1], [3], [5] and the Romanian standard [2] SR EN 1998-4 (silos, tanks and pipelines), which is implemented in Romania. Two cylindrical tanks placed in the same seismic zone have been chosen, with the same amount of storage (about 5000 m3), but of different geometries, to illustrate the influence of hydrodynamic pressures on the construction size (long and short wall behavior) as a function of ratio of the fluid height on the cylinder radius and ratio of corner period on the eigenperiod of the fluid mass. Also in the analyses, in order to evaluate the hydrodynamic convective pressure both the fundamental period of oscillation of the fluid mass and the first ten periods of oscillation were used.

Mots clés

  • seism
  • impulsive pressure
  • convective pressure
  • Housner
  • Epstein
  • Eurocode
access type Accès libre

Modelling the Slab Failure of an Open Structure Acted by External Blast Loads

Publié en ligne: 24 Oct 2016
Pages: 13 - 18

Résumé

Abstract

The explosion of bombs near buildings generally yields severe damages to the structures. Explosion resistant standards and requirements are constantly being developed and upgraded. This paper focuses on the damages which occur toa RC slab due to blast action. The numerical model replicates a ¼ scale experiment. The analysis is conducted using a software based on the recently developed Applied Element Method. This numerical method is able to model accurately all the structural behavior stages up to failure. The results are compared to experimental data available in the literature. The analysis reveals that the slab failure due to uplift pressures may be avoided by some simple reinforcing details, as they are listed in the Romanian National Annex – accidental loads of the Eurocode EN 1991-1-7.

Mots clés

  • slab uplift
  • vertical displacement
  • reinforcing details
  • accidental loads
  • applied element method
access type Accès libre

Dam Failure Effects on Local/Regional Critical Infrastructures

Publié en ligne: 24 Oct 2016
Pages: 19 - 29

Résumé

Mots clés

  • critical infrastructure
  • failure scenario
  • multi-risk analysis
  • vulnerability
access type Accès libre

The Influence of Flexibility Coefficient on the Size of Internal Forces and Deformations in Circular Plates on Elastic Medium

Publié en ligne: 24 Oct 2016
Pages: 30 - 44

Résumé

Abstract

This paper presents an analytical study which deals with the behavior of the circular plates in bending theory, considering the soil-structure interaction under Winkler's hypothesis. It was intended to illustrate the variation of internal forces and deformations according to the flexibility coefficient of plates considering three models: a fixed solid circular plate subjected to a uniformly distributed load, a fixed solid circular plate acted by a displacement applied on the exterior contour and a solid plate subjected to a temperature gradient. For this study the computation relations were written as a product between a dimensional and a non-dimensional factor, the last one indicating the variation of internal forces and deformations. For each type of action there are presented results obtained using the finite element method to illustrate the differences between this method and the analytical computation.

Mots clés

  • temperature gradient
  • stiffness
  • bending
  • Winkler medium
  • foundation
4 Articles
access type Accès libre

The Comparative Analysis of Hydrodynamic Pressures in Cylindrical Tanks

Publié en ligne: 24 Oct 2016
Pages: 1 - 12

Résumé

Abstract

This article presents a comparative study of the values of hydrodynamic pressure and their resultants occurred during the seismic action using P100-1/2013 technical rules and the relations defined in the papers: [1], [3], [5] and the Romanian standard [2] SR EN 1998-4 (silos, tanks and pipelines), which is implemented in Romania. Two cylindrical tanks placed in the same seismic zone have been chosen, with the same amount of storage (about 5000 m3), but of different geometries, to illustrate the influence of hydrodynamic pressures on the construction size (long and short wall behavior) as a function of ratio of the fluid height on the cylinder radius and ratio of corner period on the eigenperiod of the fluid mass. Also in the analyses, in order to evaluate the hydrodynamic convective pressure both the fundamental period of oscillation of the fluid mass and the first ten periods of oscillation were used.

Mots clés

  • seism
  • impulsive pressure
  • convective pressure
  • Housner
  • Epstein
  • Eurocode
access type Accès libre

Modelling the Slab Failure of an Open Structure Acted by External Blast Loads

Publié en ligne: 24 Oct 2016
Pages: 13 - 18

Résumé

Abstract

The explosion of bombs near buildings generally yields severe damages to the structures. Explosion resistant standards and requirements are constantly being developed and upgraded. This paper focuses on the damages which occur toa RC slab due to blast action. The numerical model replicates a ¼ scale experiment. The analysis is conducted using a software based on the recently developed Applied Element Method. This numerical method is able to model accurately all the structural behavior stages up to failure. The results are compared to experimental data available in the literature. The analysis reveals that the slab failure due to uplift pressures may be avoided by some simple reinforcing details, as they are listed in the Romanian National Annex – accidental loads of the Eurocode EN 1991-1-7.

Mots clés

  • slab uplift
  • vertical displacement
  • reinforcing details
  • accidental loads
  • applied element method
access type Accès libre

Dam Failure Effects on Local/Regional Critical Infrastructures

Publié en ligne: 24 Oct 2016
Pages: 19 - 29

Résumé

Mots clés

  • critical infrastructure
  • failure scenario
  • multi-risk analysis
  • vulnerability
access type Accès libre

The Influence of Flexibility Coefficient on the Size of Internal Forces and Deformations in Circular Plates on Elastic Medium

Publié en ligne: 24 Oct 2016
Pages: 30 - 44

Résumé

Abstract

This paper presents an analytical study which deals with the behavior of the circular plates in bending theory, considering the soil-structure interaction under Winkler's hypothesis. It was intended to illustrate the variation of internal forces and deformations according to the flexibility coefficient of plates considering three models: a fixed solid circular plate subjected to a uniformly distributed load, a fixed solid circular plate acted by a displacement applied on the exterior contour and a solid plate subjected to a temperature gradient. For this study the computation relations were written as a product between a dimensional and a non-dimensional factor, the last one indicating the variation of internal forces and deformations. For each type of action there are presented results obtained using the finite element method to illustrate the differences between this method and the analytical computation.

Mots clés

  • temperature gradient
  • stiffness
  • bending
  • Winkler medium
  • foundation

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