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New robust linearized seismic analysis method for tall guyed telecommunication masts / S. Ali Ghafari Oskoei in Journal of structural engineering, Vol. 138 N° 4 (Avril 2012) 

Public ISBD [article]  in Journal of structural engineering > Vol. 138 N° 4 (Avril 2012) . - pp. 502–513 Titre : New robust linearized seismic analysis method for tall guyed telecommunication masts Type de document : texte imprimé Auteurs : S. Ali Ghafari Oskoei, Auteur ; Ghyslaine McClure, Auteur Année de publication : 2012 Article en page(s) : pp. 502–513 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Seismic  design  Guyed  towers  Cable-mast  interactions  Matrix  methods  Frequency  response Résumé : Design of tall telecommunication masts is usually governed by serviceability criteria under high wind conditions, typically combined with icing in cold climates. However, there is a need for seismic design checks for guyed masts constructed in zones with moderate to high seismicity, as is routinely prescribed for buildings in modern codes. There have been few efforts towards proposing a robust simplified method of general applicability for the seismic analysis of tall masts. These structures can be represented by the simple concept of a continuous beam-column (the lattice mast) on nonlinear elastic supports (the guy cable clusters at various stay levels). In this study, the guy cables are replaced by equivalent linear lumped parameters (stiffness, mass, and viscous damping) and the effects of their interaction with the mast stiffness and inertia on the structural characteristics are discussed. The approach was tested with nine case studies of real telecommunication masts subjected to five different seismic inputs and further validated with more analysis for two selected masts under the effects of 81 recorded Californian earthquakes. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000470 [article] New robust linearized seismic analysis method for tall guyed telecommunication masts [texte imprimé] / S. Ali Ghafari Oskoei, Auteur ; Ghyslaine McClure, Auteur . - 2012 . - pp. 502–513. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 138 N° 4 (Avril 2012) . - pp. 502–513 Mots-clés : Seismic  design  Guyed  towers  Cable-mast  interactions  Matrix  methods  Frequency  response Résumé : Design of tall telecommunication masts is usually governed by serviceability criteria under high wind conditions, typically combined with icing in cold climates. However, there is a need for seismic design checks for guyed masts constructed in zones with moderate to high seismicity, as is routinely prescribed for buildings in modern codes. There have been few efforts towards proposing a robust simplified method of general applicability for the seismic analysis of tall masts. These structures can be represented by the simple concept of a continuous beam-column (the lattice mast) on nonlinear elastic supports (the guy cable clusters at various stay levels). In this study, the guy cables are replaced by equivalent linear lumped parameters (stiffness, mass, and viscous damping) and the effects of their interaction with the mast stiffness and inertia on the structural characteristics are discussed. The approach was tested with nine case studies of real telecommunication masts subjected to five different seismic inputs and further validated with more analysis for two selected masts under the effects of 81 recorded Californian earthquakes. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000470