Resumo

TERAN GILMORE, Amador  e  COETO GALAZ, Guillermo. Stiffness-based preliminary sizing of tall buildings having a steel structure with concentric braces. Ing. sísm [online]. 2014, n.90, pp.34-54. ISSN 0185-092X.

A methodology for the preliminary sizing of an earthquake-resistant system composed of steel frames and concentric braces is discussed. The methodology applies to the case of tall buildings, whose dynamic response is influenced by global bending deformations and the effect of higher modes of vibration. The preliminary sizing of the structural members of different versions of a bracing system for a 24-story building is presented. From the evaluation of the dynamic characteristics of the different versions of the bracing system, it is concluded that the use of the proposed methodology yields an adequate sizing during the preliminary performance-based design of tall braced steel buildings.

Palavras-chave : stiffness-based design; displacement-based design; bracing system; global shear lateral deformation; global bending lateral deformation.

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