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Título: Translational-torsional coupling in asymmetric structures
Autores: Yoon, Young-Soo
Fecha: 1992
Publicador: McGill University - MCGILL
Fuente:
Tipo: Electronic Thesis or Dissertation
Tema: Engineering, Civil.
Descripción: An approximate method for predicting the degree of translational-torsional coupling of mixed-bent type multi-storey building structures subject to dynamic loading is presented. The method uses the parametric approach and is based on the generalized representation of asymmetric wall-frame structures by shear-flexure, torsion-warping cantilevers. It is applicable to structures consisting of any combinations of walls and frames that are uniform with height.
Simple methods for predicting the uncoupled translational-torsional period ratio and the equivalent eccentricity, which require a knowledge of only the preliminary design information, are developed. The actual coupled period ratio can then be estimated in terms of these two quantities. The concepts of shear centres and centres of resistance of mixed-bent type multi-storey building structures are clarified, and the significance of the uncoupled and coupled period ratios in the assessment of the coupling effect is discussed. The derivation of the method and comparisons of results with those obtained by 3-D finite element dynamic analyses of discrete member models, are given. Numerical examples are worked to illustrate the application of the method.
The applicability of the method to non-uniform wall-frame structures having changes in the stiffness through the height is demonstrated; a non-uniform distribution of mass over the floor is also taken into account.
Idioma: en