Multi-Objective Optimization Design of Control Devices to Suppress Tall Buildings Vibrations against Earthquake Excitations Using Fuzzy Logic and Genetic Algorithms - Design Optimization of Active and Passive Structural Control Systems - page 180

Chapter 8
Multi-Objective Optimization
Design of Control Devices
to Suppress Tall Buildings
Vibrations against Earthquake
Excitations Using Fuzzy Logic
and Genetic Algorithms
Saeid Pourzeynali
University of Guilan, Iran
Shide Salimi
University of Mohaghegh-Ardebili, Iran
ABSTRACT
The main objective of this chapter is to find the optimal values of the parameters of the base isolation
systems and that of the semi-active viscous dampers using genetic algorithms (GAs) and fuzzy logic in
order to simultaneously minimize the buildings' selected responses such as displacement of the top story,
base shear, and so on. In this study, performance of base isolation systems, and semi-active viscous damp-
ers are studied separately as different vibration control strategies. In order to simultaneously minimize
the objective functions, a fast and elitist non-dominated sorting genetic algorithm (NSGA-II) approach
is used to find a set of Pareto-optimal solution. To study the performance of semi-active viscous damp-
ers, the torsional effects exist in the building due to irregularities, and unsymmetrical placement of the
dampers is taken into account through 3D modeling of the building.