Study on the influence of the layout of isolation bearings on the seismic performance of stilted buildings on the slope
In this paper,the stilted buildings were taken as the research object,and according to the characteristics of unequal height embedded structure,three types of three-dimensional stilted frame structures were designed:non-isolation,base isolation and the second floor column bottom isolation(interlayer isolation).Then elastic response spectrum analysis and elastic-plastic dynamic time history analysis of analysis models were carried out to investigate the influence of different isolation bearing layout on the dynamic response,failure mode,probability of seismic collapse and other seismic performance of stilted frame structures.The results show that the application of seismic isolation technology to the stilted frame structure on slope can control the dynamic response of the structure and improve the safety margin of the whole structure,which provides a new way to improve its seismic performance.The setting of base isolation can improve the non-uniformity of structural stiffness distribution,reduce the difference of shear distribution between stilted columns and improve the safety reserve of the shortest columns.However,there are differences in the deformation of isolation bearings with different levels.Isolation bearings with different lateral stiffness should be arranged in the base isolation model.Compared with the base isolation,the interlayer isolation has better ability to control the structural damage,the deformation of the upper floor is more uniform,and the probability of seismic collapse is lower.However,in the interlayer isolation design,it should be considered to appropriately reduce the difference of lateral stiffness between stilted columns.
stilted frame structuresisolation bearingsseismic behaviordynamic responseprobability of seismic collapse
万方数据
维普
