Analysis Of Seismic Response Of High-rise Seismic Isolation Structure Under Long Periodic Ground Vibration

In recent years,earthquake disasters have become more frequent and earthquake isolation buildings have been popularized and applied in China.With the demand of actual engineering,the development and promotion of construction industry,the high-rise isolation building has become a hot topic of study,and many difficulties remain to be studied and solved.On the other hand,people's understanding of ground vibration is no longer limited to the short period of ground vibration.The influence of the long period component on the upper structure and the isolation structure becomes a new focus,and The structural hazards of resonance should not be overlooked.The traditional isolation design is based on short period vibration.In the development of high level isolation,the influence of long period vibration needs to be analyzed and studied.In this paper,a high-level shear wall is selected as the research object.ETABS is used to design and analyze the shock isolation performance.The shear force of the wall,interlayer displacement angle and top acceleration time under short period ground vibration is obtained.The modal analysis is carried out,and the shock absorbency of the high-rise isolation structure is calculated.And the anti-capsizing stress of the isolation supports is analyzed.Then,three long periodic ground vibrations with abundant components were selected,and their spectral characteristics were analyzed.Then,the seismic responses of the structures under long periodic ground vibration are analyzed,and the displacement angle,absolute acceleration,shear force and anti-capsizing stress of the structures under long and short periodic ground vibration are compared.Based on the analysis of the high-rise isolation structure,this paper studies the shock absorbency and anti-capsizing performance of the high-rise isolation structure,analyzes the difference of seismic response of the high-rise isolation structure under the action of long and short periods of vibration,and points out the harmfulness of the long-cycle ground vibration to the high-rise isolation structure.Therefore,the research of this paper have certain practical significance.