15-07-2017, 02:28 PM
High buildings with core insulation are being built in Japan. The insulation of the base is obtained in high-rise buildings by not only the earthquake load, but also the wind load. In the case of the base insulation obtained by the seismic load, the input energy to the structures decreases because the natural frequency of the structure becomes smaller and moves away from the frequency at the peak of the power spectrum of the earthquake excitation . However, in the case of the base insulation obtained by the wind load, the input energy to the structures increases because the natural frequency of the structure is reduced and closed at the frequency at the peak of the power spectrum of the excitation of the wind. In addition, the risk of resonance from wind loading is greater than the building with the same configuration and without the insulation of the base. It is therefore necessary to examine the aerodynamic stability of high-rise buildings with the insulation of the base. However, previous studies do not give us an efficient technique to simulate the aerodynamic stability of buildings with basic insulation. One of the authors has proposed a new approach to simulate aerodynamic oscillation in a wind tunnel. The approach was called hybrid aerodynamic vibration technique or HAT. Like the modified approach, the author has also proposed the new hybrid aerodynamic vibration technique, which is referred to as NHAT.
