Optimal Placement of Controller for Seismic Structures - Design Optimization of Active and Passive Structural Control Systems - page 16

Figure 10. Damper distribution using the maximum absolute acceleration (J3) for different search
algorithms

including the modal damping ratio and the mass
participation factor are given in Table 5.
The interstory height is 3m , while the total
weight of the building is 2038.41 kN . The struc-
tural response in term of interstory drifts and
absolute accelerations are shown in Figure 11 for
the uncontrolled structures.

In the first step, a viscous damper was designed
and used such that the fundamental mode has 25%
damping ratio, when one damper is placed at
every story unit (uniform distribution). The struc-
tural responses of the uniformly braced structure
for different seismic events are shown in Figure
12.