Influence Of Different Types Of Seismic Wave On Isolation Structures Of Frame-shear Walls

With the construction of more and more buildings and the continuous development of technologies in the field of civil engineering,seismic isolation technology has become more and more widely used in the field of seismic construction.In order to study the influence of different types of seismic waves on the frame shear wall structure,a finite element model of a frame shear wall structure was first established using SAP2000,and a seismic isolation design was applied to the frame shear wall structure.Different types of lead-core shock bearings are rationally arranged.Using the fast nonlinear analysis method,the natural vibration period,the floor shear force,the base shear force and the interlayer displacement angle of the structure were calculated,and the changes in the seismic performance of the structure before and after the earthquake isolation were studied.In the current specification,ground vibration is mainly controlled by peak acceleration,the effect of ground motion also includes the impact of peak velocity and peak displacement on seismic waves.The peak velocity and peak displacement in nature have a significant effect on the elasto-plastic nonlinear seismic response of building structures.When manually analyzing the time history of earthquakes,it is necessary to input the peak velocity and peak displacement of ground motion into the building structure.Perform time history analysis.In this paper,based on the wavelet function method,the ground motion considering the peak velocity and peak displacement was artificially synthesized and input into the structure for calculation and analysis.The influence of the ground motion considering the peak displacement and the peak velocity on the seismic isolation structure was studied.The main contents are:1)After the seismic isolation of the frame shear wall,the natural vibration period of the structure is prolonged,extending from 2.4s to 3.7s,which is 1.5 times longer;the basement shear force under the earthquake-isolation structure is about 60% lower than that of the non-isolated structure.The seismic performance of the structure has greatly improved.The displacement angle between layers of a non-isolated model is characterized by bending deformation.Under the action of isolation bearings,due to the large displacement generated by the seismic isolation bearings under horizontal earthquakes,the deformation of thesuperstructure is basically a translational motion.Therefore,the change in the displacement angle between the superstructure layers is not significant.About half of the isolation model.After setting the isolation bearing,the acceleration at the top floor of the seismic isolation model is significantly reduced.It shows that the earthquake effect on the top floor is reduced,and the isolation effect of the overall structure is significantly improved.2)In this paper,the wavelet function method is used to synthesize the seismic wave considering the peak displacement and the peak velocity.The seismic wave considering the peak velocity and peak displacement is input into the structure for time history analysis.The calculation results show that the seismic wave considering the peak displacement and peak velocity has little effect on the maximum top floor acceleration of the isolation structure.This is because the seismic performance of the superstructure is improved after the isolation bearing is installed,and the amplification effect of the base seismic wave is weakened..The peak velocity has a great influence on the maximum velocity and the maximum displacement of the top layer of the structure.Under the action of the seismic wave considering the peak velocity,the displacement of the upper structure and the displacement angle between layers all increase significantly.Therefore,in the seismic analysis,the influence of the peak velocity on the structure should be considered.