Evolutionary Optimization of Passive Compensators to Improve Earthquake Resistance - Design Optimization of Active and Passive Structural Control Systems - page 265

Figure 5. Simplified building model and optimization results

Parameters of the Optimization Process

Figure 5a). The base excitation is given by the
Kobe earthquake NS (Berkeley 1995). The use
of any other excitation would yield correspond-
ing results. For real application there should be a
comparative analysis with different seismic load-
ings. The fitness function should then include a
summed response of the structure.
We start the optimization of the building by
making decisions about some parameters of the
optimization job. We define how many compen-
sators are to be installed and on which floors
they should be placed. This decision could be

The following results are derived from simple
examples which may easily be reproduced using
conventional results e.g. the modal contributions
(Den Hartog 1956 pp. 87-121). Within the numeri-
cal tolerances and the scatter of the evolutionary
method corresponding results are found.
For the examples outlined, we use a vertical
steel structure with a cross section of 5 x 6 m 2 and
a height of 100 m. We divide this column in 10
floors where we might apply compensators (cf.