Documents disponibles écrits par cet auteur

Practical formulas for frequency domain analysis of earthquake-induced dam-reservoir interaction / Najib Bouaanani in Journal of engineering mechanics, Vol. 136 N° 1 (Janvier 2010) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 136 N° 1 (Janvier 2010) . - pp. 107-119 Titre : Practical formulas for frequency domain analysis of earthquake-induced dam-reservoir interaction Type de document : texte imprimé Auteurs : Najib Bouaanani, Auteur ; Perrault, Charles, Auteur Article en page(s) : pp. 107-119 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Hydrodynamic  pressure  Dam  safety  Seismic  effects  Earthquake  engineering  Reservoirs  Closed  form  solutions  Frequency  response. Résumé : Dam-reservoir dynamic interactions are complex phenomena requiring advanced mathematical and numerical modeling. Although available sophisticated techniques can handle many aspects of these phenomena, simplified procedures are useful and still needed to globally evaluate the dynamic response of dam-reservoir systems. This paper presents and validates an original practical procedure to investigate earthquake induced dam-reservoir interaction in the frequency domain, including the effects of dam flexibility, water compressibility, and reservoir bottom wave absorption. The procedure relates hydrodynamic pressure due to any deflected modal response of a two-dimensional gravity dam on a rigid foundation to hydrodynamic pressure caused by a horizontal rigid body motion. New analytical expressions that can be easily programmed in a spreadsheet package or implemented in a dam structural analysis program are also proposed to conduct simplified fundamental mode earthquake analysis of gravity dams. The techniques presented can be efficiently used to provide valuable insight into the effects and relative importance of the various parameters involved in the dynamic response of dam-reservoir systems. Although the mathematical derivations and closed-form expressions developed were applied to dam-reservoir systems herein, they can be easily adapted to other fluid-structure interaction problems. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] Practical formulas for frequency domain analysis of earthquake-induced dam-reservoir interaction [texte imprimé] / Najib Bouaanani, Auteur ; Perrault, Charles, Auteur . - pp. 107-119. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 136 N° 1 (Janvier 2010) . - pp. 107-119 Mots-clés : Hydrodynamic  pressure  Dam  safety  Seismic  effects  Earthquake  engineering  Reservoirs  Closed  form  solutions  Frequency  response. Résumé : Dam-reservoir dynamic interactions are complex phenomena requiring advanced mathematical and numerical modeling. Although available sophisticated techniques can handle many aspects of these phenomena, simplified procedures are useful and still needed to globally evaluate the dynamic response of dam-reservoir systems. This paper presents and validates an original practical procedure to investigate earthquake induced dam-reservoir interaction in the frequency domain, including the effects of dam flexibility, water compressibility, and reservoir bottom wave absorption. The procedure relates hydrodynamic pressure due to any deflected modal response of a two-dimensional gravity dam on a rigid foundation to hydrodynamic pressure caused by a horizontal rigid body motion. New analytical expressions that can be easily programmed in a spreadsheet package or implemented in a dam structural analysis program are also proposed to conduct simplified fundamental mode earthquake analysis of gravity dams. The techniques presented can be efficiently used to provide valuable insight into the effects and relative importance of the various parameters involved in the dynamic response of dam-reservoir systems. Although the mathematical derivations and closed-form expressions developed were applied to dam-reservoir systems herein, they can be easily adapted to other fluid-structure interaction problems. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]

Seismic response of asymmetric rectangular liquid-containing structures / Najib Bouaanani in Journal of engineering mechanics, Vol. 138 N° 10 (Octobre 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 10 (Octobre 2012) . - pp. 1288–1297. Titre : Seismic response of asymmetric rectangular liquid-containing structures Type de document : texte imprimé Auteurs : Najib Bouaanani, Auteur ; Damien Goulmot, Auteur ; Benjamin Miquel, Auteur Année de publication : 2012 Article en page(s) : pp. 1288–1297. Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Seismic  response  Fluid-structure  interaction  Liquid-containing  structures  Tanks  Reservoirs  Analytical  formulations  Frequency  response  Time-history  response  Hydrodynamic  pressure  Finite  elements Résumé : A new formulation to investigate the seismic response of symmetric and asymmetric rectangular liquid-containing structures is developed and validated in this paper. The proposed method is based on a substructuring approach, where the flexible liquid-containing structure is modeled using finite elements, while the impulsive effects of the fluid domain are modeled analytically through interaction forces at the fluid-structure interfaces. The technique takes account of geometrical or material asymmetry of the liquid-containing structure, fluid compressibility, and energy dissipation through reservoir-bottom absorption. The formulation is presented in such a way that it can be easily coded into a practical and computationally efficient program and is applied to illustrative examples highlighting the effects of geometrical and material asymmetry on the dynamic responses of liquid-containing structures. The obtained frequency- and time-domain results are successfully validated against advanced finite-element analyses. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000423 [article] Seismic response of asymmetric rectangular liquid-containing structures [texte imprimé] / Najib Bouaanani, Auteur ; Damien Goulmot, Auteur ; Benjamin Miquel, Auteur . - 2012 . - pp. 1288–1297. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 10 (Octobre 2012) . - pp. 1288–1297. Mots-clés : Seismic  response  Fluid-structure  interaction  Liquid-containing  structures  Tanks  Reservoirs  Analytical  formulations  Frequency  response  Time-history  response  Hydrodynamic  pressure  Finite  elements Résumé : A new formulation to investigate the seismic response of symmetric and asymmetric rectangular liquid-containing structures is developed and validated in this paper. The proposed method is based on a substructuring approach, where the flexible liquid-containing structure is modeled using finite elements, while the impulsive effects of the fluid domain are modeled analytically through interaction forces at the fluid-structure interfaces. The technique takes account of geometrical or material asymmetry of the liquid-containing structure, fluid compressibility, and energy dissipation through reservoir-bottom absorption. The formulation is presented in such a way that it can be easily coded into a practical and computationally efficient program and is applied to illustrative examples highlighting the effects of geometrical and material asymmetry on the dynamic responses of liquid-containing structures. The obtained frequency- and time-domain results are successfully validated against advanced finite-element analyses. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000423