Study on the shock-absorbing effect of a new staggered story isolated structure under the long-period earthquake motion

The finite element model of a new staggered story isolated structure is established. Using the time-history analysis method, dynamic response state at each time step calculated by integrating acceleration data step-by-step. Three different types seismic waves (ordinary wave, near-fault impulse far-field quasi harmonic and long-period wave) are input respectively for history analysis. result indicates that has good shock absorption effect under action three waves. There certain differences in kinds ground motions. ordinary motions minimal, but increases to near-field fault pulse Meanwhile, inter-story shear force, inter acceleration, displacement, damage, energy all increasing, However, compared with aseismic structure, force reduced 48%, 23%, displacement dissipation rate layer 65%. In addition, bearing condition during occasional earthquakes normal motion. exceeds permissible range motion earthquakes. Therefore, special consideration should be given area where involved.