Understanding the trends in torsional effects in asymmetric-plan buildings
Resource
Bulletin of Earthquake Engineering, 10(3), 955-965
Journal
Bulletin of Earthquake Engineering
Journal Volume
10
Journal Issue
3
Pages
955-965
Date Issued
2012
Date
2012
Author(s)
Abstract
This paper studied the reasons behind the four trends in torsional effects in asymmetric-plan buildings observed in the current literature. It was found that the modal eccentricities and the non-proportionality between the modal translations and the modal rotation are key to understanding these trends in torsional effects in asymmetric-plan buildings. These key points were obtained from the three-degree-of-freedom modal systems, which represent the single vibration mode of a two-way asymmetric-plan building. This paper showed that the modal eccentricities, rather than the overall structural eccentricities, are the critical parameters for deciding the trend of the unequal displacement demand on the floor diaphragm. In addition, the non-proportionality between the modal translations and the modal rotation leads to the trend that the torsional effects generally decrease when plastic deformations increase. © Springer Science+Business Media B.V. 2012.
Subjects
Asymmetric-plan buildings; Inelastic deformation; Modal eccentricity; Torsional effects
SDGs
Other Subjects
Critical parameter; Displacement demand; Floor diaphragms; Inelastic deformation; Keypoints; Modal eccentricity; Modal systems; Nonproportionality; Rotation leads; Torsional effect; Vibration modes; Spot welding; Buildings; asymmetry; eccentricity; elasticity; plastic deformation; torsion; trend analysis; vibration
Type
journal article
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