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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Optimal Vibration Control of Adjacent Building Structures Interconnected by Viscoelastic Dampers
Author(s)
Ming-Yi Liu, An-Pei Wang and Ming-Yi Chiu
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DOI:10.17265/1934-7359/2017.05.007
Affiliation(s)
Department of Civil Engineering, Chung Yuan Christian University, Chungli District, Taoyuan City 32023, Taiwan
ABSTRACT
The objective of this paper is to investigate the dynamic
characteristics of two adjacent building structures interconnected by viscoelastic dampers under seismic excitations. The computational
procedure for an analytical model including the system model formulation,
complex modal analysis and seismic time history analysis is presented for this
purpose. A numerical example is also provided to illustrate the analytical
model. The complex modal analysis is conducted to determine the optimal damping
ratio, the optimal damper stiffness and the optimal damper damping of the viscoelastic dampers for each mode of the
system. For the damper stiffness
and damping with optimal values, the responses can be categorized into
underdamped and critically damped vibrations. Furthermore, compared to the
viscous dampers with only the energy dissipation mechanism, the viscoelastic dampers with both the energy dissipation and
redistribution mechanisms are more effective for increasing the damping ratio
of the system. The seismic time history
analysis is conducted to assess the
effectiveness of the viscoelastic dampers for vibration control. Based on the optimal damping ratio, the optimal damper stiffness,
the optimal damper damping of the viscoelastic dampers for a certain mode of the system, and the viscoelastic dampers can be used to
effectively suppress the root-mean-square responses as well as the peak responses of the two adjacent buildings.
KEYWORDS
Adjacent building structure, viscoelastic damper, complex modal analysis, seismic time history analysis.
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