Abstract
As a building becomes higher and more slender, the hysteretic damper is often installed for mitigation of oscillations. However in the case that the oncoming wind velocity almost reaches the critical range of the onset of aeroelastically unstable phenomena, we encounter the unsolved trade-off problem such that a damping performance of the building surely increases, but the natural frequency tends to shift lower and resonant velocity becomes lower. So we carry out the wind tunnel experiment in order to estimate the across wind oscillations of a tall building with hysteretic damper, which is placed in the atmospheric turbulent boundary layer. We also estimate a hysteretic damping performance by investigating the relation between the static load and the deformation of a building model. Finally we compare the inelastic response under the hysteretic damping conditions with the elastic response under the equivalent viscous damping conditions. On the basis of their relation, the performance of hysteretic damper on a tall building is discussed.
