About the author:

1. Sichuan Institute of Building Research, Chengdu, Sichuan 610081, China; 2. Shanghai Key Laboratory ofEngineering Structure Safety, Shanghai Research Institute of Building Sciences Co., Ltd., Shanghai 200032, China

Abstract:

Seismic isolation technology can effectively control the dynamic response of structures underearthquake, and has been widely applied in practical engineering. But at present, the research andapplication of seismic isolation technology are mostly concentrated in the whole building structure, andthe application in large-scale exhibits is less. For large-scale outdoor exhibits, a composite isolationcontrol system is used to isolate them and control the dynamic response of the structure under earthquakeaction. An isolated structure model with composite isolation control system and a non-isolated structuremodel with conventional fixed installation were established by finite element analysis software, and thedynamic response characteristics of the two models were compared by nonlinear time history analysis. Theresearch results show that the maximum reduction of the relative horizontal displacement of the top andbottom of the main pole of the exhibits under the condition of PGA = 0.035g and PGA = 0.220g relative tothe FIX structure is 55.2% and 76.7% respectively,the maximum reduction of the horizontal accelerationpeak at the top of the main pole is 45.0% and 77.1% respectively, and the maximum reduction of thevertical force of the base node is 72.8% and 82.3% respectively. The adoption of a composite isolationcontrol system can effectively reduce the dynamic response of the structure. The reduction in amplitude isparticularly significant under conditions with a larger peak acceleration, and the overall structural stabilityis significantly enhanced.