Abstract
Viscous dampers (VDs) are effective and widely used passive devices for the protection of civil structures, provided that appropriate design is carried out. For this purpose, an optimal design and optimum distribution of VDs method is presented for a shear building under the critical excitation by using random vibration theory in frequency domain. In the optimization, by using Differential Evolution (DE) algorithm, the and top floor displacement are evaluated as objective functions taking into consideration upper and lower limits of VDs damping coefficients, so that optimal damper placement and properties of shear building can be determined. In this design, VDs-shear building system is tested under three different ground motions being compared to some methods in the literature and uniformly distributed VDs placed at each story. It is shown that, the results of study are both compatible and very successful in reducing the response of structure under the different ground motions.
Highlights
In traditionally designed building structures, reduction of enormous vibration energy is inadequate because of their very limited energy absorption capacity
The optimal design concept of viscous dampers (VDs) has been widely studied in the literature (Constantinou and Tadjbakhsh, 1983; Hahn and Sathiavageeswara, 1992; Zhang and Soong, 1992; Cao and Mlejnek, 1995; Shukla and Datta, 1999)
Lopez Garcia and Soong (2002) proposed a practical design approach of optimal linear type viscous dampers by using designed simplified sequential search algorithm (SSSA) which has a similar effect with some sophisticated methods
Summary
Optimal Design and Distribution of Viscous Dampers for Shear Building Structures Under Seismic Excitations. By using Differential Evolution (DE) algorithm and the top floor displacement are evaluated as objective functions taking into consideration upper and lower limits of VDs damping coefficients, so that optimal damper placement and properties of the shear building can be determined. In this design, the VDs-shear building system is tested under the three different ground motions being compared to some methods in the literature and uniformly distributed VDs placed at each story.
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