Large Chassis Structure Of Double Isolation Design And Seismic Response Analysis

With the vigorous development of modern city construction,large chassis single tower structure has emerged.This structure changes vertically in the connection between the large chassis and the tower,and when the earthquake occurs,the floors that mutate along the height are prone to damage and even cause the collapse of the whole structure.Large chassis structure of double layer interval seismic technology is set isolation bearing between the big chassis and the upper towers,using the isolation layer of large deformation and energy dissipation structure transfer ability reducing earthquake effect,and weaken the seismic action effect on the tower,in order to achieve the desired seismic target.’In this paper,the structural design and application of seismic response are analyzed in this paper.The following research is mainly carried out:This paper introduces the principle,characteristics,application situation and mechanical properties of isolation bearings,and discusses the establishment and solution of dynamic analysis model of large chassis interval seismic structure.In seismic design,on the basis of theoretical research,the characteristic of structure layer interval,the big chassis structure of double isolation is presented,the basic framework,the research is mainly focused on the isolation bearing selection and optimization of the layout,by comparing the upper layer shear force and overturning moment of the structure analysis of different isolation bearing arrangement scheme for large chassis structure of double isolation effect,and the isolation layer for calculation and checking;Numerical simulation analysis was carried out on the structure,and compared with the structure,the level of analysis it is concluded that damping coefficient,the damping coefficient as the upper structure damping effect evaluation criteria,and then adjust the upper tower structure scheme.Of adjusted with isolation layer structure model and the structure model under severe earthquake response spectrum analysis and time history analysis,comparative isolation structure with the isolation of the structure of the natural vibration period,interlayer displacement Angle,interlaminar shear and dynamic time history response,results show that the structure design to achieve the desired isolation layer interval shock effect,and can meet the requirements of the upper structure elasticity.With a Push-over analysis method to earthquake isolation,the seismic performance of the upper structure design was studied,and analysis of the isolation layer of the upper structure under severe earthquake is nonlinear response,analyzes its failure mechanism,evaluation of structure under severe earthquake seismic performance.The theoretical analysis shows that the seismic isolation design of the large chassis single tower structure shown in the case is clear and the effect of shock absorption is remarkable.Therefore,it is feasible to apply the interval seismic technique to the structure of large chassis single tower.