Inelastic Responses of Two-Way Asymmetric-Plan Structures under Bidirectional Ground Excitations-Part I: Modal Parameters
Resource
Earthquake Spectra, 28(1), 105-139
Journal
Earthquake Spectra
Journal Volume
28
Journal Issue
1
Pages
105-139
Date Issued
2012
Date
2012
Author(s)
Abstract
It has been found that any one vibration "mode" of an inelastic multistory two-way asymmetrical building structure can be represented by a three-degreeof-freedom (3DOF) modal system representing two modal translations and one modal rotation. This study introduces the inelastic response spectra constructed from the inelastic 3DOF modal systems, which is specifically useful for multistory two-way asymmetric-plan buildings subjected to bidirectional ground excitations. These spectra for asymmetrical structures (SAS) provide the threecomponent inelastic peak modal responses of multistory two-way asymmetricplan buildings subjected to bidirectional ground excitations. In order to construct the SAS, the independent elastic parameters of the 3DOF modal systems were identified and the inelastic 3DOF modal parameters versus the strength ratio relationships were established. The parametric study of the 3DOF modal parameters showed the ranges and the variation trends of these parameters. Two example buildings are analyzed to verify the effectiveness of the above-mentioned investigations. © 2012, Earthquake Engineering Research Institute.
Other Subjects
Composite beams and girders; Asymmetrical structures; Building structure; Elastic parameters; Ground excitation; Inelastic response; Inelastic response spectrum; Modal parameters; Parametric study; Modal analysis; elastic property; ground motion; multistorey building; seismic response; spectral analysis; vibration
Type
journal article
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