ABSTRACT
This chapter presents the effectiveness of fluid viscous dampers investigated by way of reduction in displacement, acceleration and shear force responses of the coupled buildings in four different examples. All the results are shown with graphics taken from SAP 2000n package program. Firstly, frequency domain is graphically evaluated in terms of the spectral density functions of displacement and acceleration for the four example buildings. Secondly, time domain is graphically evaluated in terms of the time histories of base shear force and displacement for the four buildings. The dampers can mitigate the amplitudes of shear forces in both the earthquakes. Fluid viscous dampers can reduce significantly the amplitudes of displacement in N-S direction because of different shear forces of each building, especially 1994 Northridge earthquake. After the first ten seconds, the peak responses of buildings in E-W direction in both the earthquakes reduce with the peak response reduction ranging between 10–20 per cent.
