Optimal damper and collocations of Building Structures
Zhou Xingde
(Department of Engineering Mechanics，Hohai University，Nanjing 210098)

Abstract: Mounting damper is the simplest anti-vibration way for building structures. Two optimal collocation methods are developed to acquire a better anti-vibration effect when the damper number is less than the floor number. The first method is based on the critical excitation, and the smallest critical dampe ramong all placements is chosen as the optimal placement. The second method is based on a given damper, and the optimal allocation can be acquired by the compa rison of control effects. Under the premise that the structural anti-vibration effect can be assured, the real coded genetic algorithms are employed to find a lower damper increment. A numerical example is presented to confirm the feasibil ity.
Keyword: critical excitation approaches, optimal damper, optimal collocation，realcoded genetic algorithms.