Structural Optimization and Vibration Control using Magneto- Rheological Dampers in Tall Buildings under Dynamic Wind Load

Resumo

The importance of the wind action in structures, in a context in which the maximum possible and
acceptable slenderness is desired, increases directly and proportionally to the height of the buildings. Those tall
and slender buildings, respecting safety criteria, always aim at the minimum cost. This work is part of that scenario,
which aimed to apply structural optimization methods combined with the use of Magneto-rheological (MR)
dampers in tall buildings under dynamic wind load. The structure, idealized in concrete, was modeled using the
finite element method and, the dynamic wind load, through a stochastic process. The optimization of the structure's

mass was performed using the Particle Swarm Optimization (PSO) algorithm. Finally, a set of MR dampers (RD-
1005-03, Lord Corporation), considering the modified Bouc-Wen rheological model with parameters obtained

experimentally was applied in the structure. The results showed that the structural optimization combined with the
control produced by the MR dampers was able to reduce the response, demonstrating that smart structures, which
combine optimization techniques and semi-active control in their design, are a promising alternative.