Influence of Seismic Ground Motions with Different Frequency on Super High-rise Building Structural Seismic Response

Large differences of seismic response may exist when the structure subject different frequency seismic ground motions, and the low frequency and the high frequency may control the seismic response of different stage for super tall structure. Three groups earthquake waves which have different frequency were selected as input for time history analysis of a designed super tall building structural model. The analysis software is PERFORM-3D. The results show that the gap is very large in displacement, base shear and the maximum story drift ratio. Meanwhile, the maximum vertex displacement of structure lagging behind the maximum base shear. Nevertheless, there are a lot research shows that the transient response of high frequency seismic ground motions may induce the bigger displacement than the resonance. But the mode decomposition response spectrum method could not make a reasonable estimate on the seismic response characteristic of super high-rise structure. Super high-rise building structures have their own unique response characteristics in different frequency component ground motions, so needing to consider the ground motion with different frequencies when choose a wave for time history analysis.