Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27038
Title: Dynamic responses of two buildings connected by viscoelastic dampers under bidirectional earthquake excitations
Authors: Yang, Z
Lam, ESS 
Keywords: Adjacent buildings
Bidirectional excitations
Connecting dampers
Fractional derivative
Issue Date: 2014
Publisher: Springer
Source: Earthquake engineering and engineering vibration, 2014, v. 13, no. 1, p. 137-150 How to cite?
Journal: Earthquake Engineering and Engineering Vibration 
Abstract: In this study, dynamic responses of two buildings connected by viscoelastic dampers under bidirectional excitations are extensively investigated. The two buildings are a 10-story building and a 16-story building, with the shorter building on the left. Viscoelastic dampers are installed at all floors of the shorter building. Equations of motion are formulated using a fractional derivative model to represent the viscoelastic dampers. Three cases are considered with mass eccentricities at 0, 10% and -10% with respect to the dimensions of the buildings. The responses of the buildings are numerically predicted at different damper properties. The simulation results indicated that the maximum horizontal responses of the buildings without eccentricities are significantly mitigated. However, torsional effects are adversely increased. For asymmetric buildings, the effectiveness of the connecting dampers is affected by building eccentricities. As a result, mass eccentricities must be taken into account in damper selection. When compared with vibrations induced by unidirectional excitations, bidirectional excitations can increase the responses of coupled asymmetric buildings. In addition, installing dampers only at the top floor of the shorter building may cause a sudden change in lateral stiffness of the taller building. Consequently, the story shear envelopes of the taller building are changed.
URI: http://hdl.handle.net/10397/27038
ISSN: 1671-3664
DOI: 10.1007/s11803-014-0218-0
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