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Dynamic responses of a structure with periodic foundations / Jing Bao in Journal of engineering mechanics, Vol. 138 N° 7 (Juillet 2012) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 138 N° 7 (Juillet 2012) . - pp.761–769 Titre : Dynamic responses of a structure with periodic foundations Type de document : texte imprimé Auteurs : Jing Bao, Auteur ; Zhifei Shi, Auteur ; Hongjun Xiang, Auteur Année de publication : 2012 Article en page(s) : pp.761–769 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Seismic  isolation  Periodic  foundation  Band  of  frequency  gap Résumé : The dynamic responses of a structure with different foundations, including the so-called periodic foundation, are studied. Based on the calculation and optimization regarding the band of frequency gap of a periodic structure, a new kind of periodic isolated foundation is designed. To test the validity of this periodic isolated foundation, the dynamic responses of a seven-storey frame structure with three different foundations are conducted and compared. The analysis assumes that seismic wave input is from the arbitrary direction. This investigation shows that the seismic waves cannot propagate in the periodic foundation without being attenuated when the frequencies of the seismic wave fall within the band of frequency gap of the foundation. Thus, the dynamic responses of the supported structure will be greatly reduced. The investigation supports this new and effective method to block seismic waves for structures in civil engineering. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000383 [article] Dynamic responses of a structure with periodic foundations [texte imprimé] / Jing Bao, Auteur ; Zhifei Shi, Auteur ; Hongjun Xiang, Auteur . - 2012 . - pp.761–769. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 138 N° 7 (Juillet 2012) . - pp.761–769 Mots-clés : Seismic  isolation  Periodic  foundation  Band  of  frequency  gap Résumé : The dynamic responses of a structure with different foundations, including the so-called periodic foundation, are studied. Based on the calculation and optimization regarding the band of frequency gap of a periodic structure, a new kind of periodic isolated foundation is designed. To test the validity of this periodic isolated foundation, the dynamic responses of a seven-storey frame structure with three different foundations are conducted and compared. The analysis assumes that seismic wave input is from the arbitrary direction. This investigation shows that the seismic waves cannot propagate in the periodic foundation without being attenuated when the frequencies of the seismic wave fall within the band of frequency gap of the foundation. Thus, the dynamic responses of the supported structure will be greatly reduced. The investigation supports this new and effective method to block seismic waves for structures in civil engineering. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000383

Elastic analysis of beam-wall joints subjected to out-of-plane bending / Ying Chen in Journal of structural engineering, Vol. 138 N° 6 (Juin 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 718–728 Titre : Elastic analysis of beam-wall joints subjected to out-of-plane bending Type de document : texte imprimé Auteurs : Ying Chen, Auteur ; Zhifei Shi, Auteur ; Yilung Mo, Auteur Année de publication : 2012 Article en page(s) : pp. 718–728 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Beam-wall  joint  Nonplanar  bending  Plate  theory  Equivalent  bending  width Résumé : The mechanical performance of reinforced concrete beam-thin-wall joints under out-of-plane bending moments is studied and the analytical solutions in terms of stresses and rotational stiffness of the wall are obtained. For convenience, the equivalent bending width of the shear walls is introduced and obtained based on two equivalence principles. A detailed parametric study of the equivalent bending width is carried out, including geometric parameters, boundary conditions, and reinforcement ratio of the beam-wall joint in shear wall. Some simplified formulae for the equivalent width are proposed and compared with both the analytical solutions and the experimental results. Good agreements are found. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000519 [article] Elastic analysis of beam-wall joints subjected to out-of-plane bending [texte imprimé] / Ying Chen, Auteur ; Zhifei Shi, Auteur ; Yilung Mo, Auteur . - 2012 . - pp. 718–728. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 718–728 Mots-clés : Beam-wall  joint  Nonplanar  bending  Plate  theory  Equivalent  bending  width Résumé : The mechanical performance of reinforced concrete beam-thin-wall joints under out-of-plane bending moments is studied and the analytical solutions in terms of stresses and rotational stiffness of the wall are obtained. For convenience, the equivalent bending width of the shear walls is introduced and obtained based on two equivalence principles. A detailed parametric study of the equivalent bending width is carried out, including geometric parameters, boundary conditions, and reinforcement ratio of the beam-wall joint in shear wall. Some simplified formulae for the equivalent width are proposed and compared with both the analytical solutions and the experimental results. Good agreements are found. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000519