期刊
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
卷 41, 期 12, 页码 1673-1692出版社
WILEY-BLACKWELL
DOI: 10.1002/eqe.1197
关键词
viscous dampers; passive control; wall structures; total accelerations
资金
- Israel Ministry of Housing and Construction through the National Building Research Institute at the Technion [2013019]
This paper rigorously assesses the efficiency of viscous dampers connecting two walls to result in viscously coupled shear walls. This assessment also holds for viscous dampers in wall structures as they are mounted on frames parallel to the walls leading to wall-viscous frame systems. A continuum approach is adopted to model the structure so as to enable non-dimensional formulation of the governing equations. Those equations reveal that, under the approximations considered, the system damping ratio (defined here by 0.5?sqrt(c boolean AND 2/(m*EI))) is a convenient compact single parameter controlling the response reduction w.r.t. the response of the corresponding undamped system. In contrast to coupled shear walls, this controlling parameter does not depend on the height of the building; therefore, the viscously damped system is efficient for low-rise buildings as well. The continuum approach also allows a semi-analytical solution of the eigenproblem in the complex domain followed by a complex modal spectral analysis. Those solutions reveal the efficiency of the added damping in reducing not only the displacements, inter-story drifts, and wall moments but also the absolute accelerations, wall shear, total shear, and total overturning moments. The results of the analyses and the non-dimensional tables and graphs developed for important response parameters lead to a simple method that could easily be implemented in practice for the purpose of initial design. Copyright (c) 2012 John Wiley & Sons, Ltd.
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