Study On Seismic Isolation Effect Of Basal Rubber Particle Cushion Under Soil Structure Interaction In Sloping Field

In rural areas of our country,low and multistory masonry structure and frame structure houses are severely damaged in the earthquake,Soil shows strong nonlinear characteristics when the earthquake loads.However,traditional design method is still used rigid foundation assumption,that the foundation stiffness and damping effect on the dynamic characteristics of the upper structure are not taken into account.With the development of the Belt and Road and the western development strategy,in order to use as much land resources as possible,many buildings build on the slope,while the slope has significant elevation amplification effect under seismic load.The current research on the isolation of soil-structure interaction under the slope construction is relatively few.So this paper carry out study on coupling effect between soil and structures under the ground space,as well as on seismic isolation effect of rubber particles cushion under soil structure interaction in sloping field,mainly discusses the rubber particles cushion isolation effect rule when different excitation and frequency sine wave function,rubber particle layer thickness change and adjacent structure distance changes.Through small shaking table test,and the combination of numerical simulation method to study isolation effect of rubber particle cushion on ground space.Experimental study on isolation effect rule of basal rubber particle cushion when different incentive and different frequency sine wave function,rubber cushion thickness change and adjacent structure distance change under soil-structure interaction and structure-soil-structure interaction,and analysis seismic isolation laws of rubber particle cushion under different incentive and different frequency sine wave function,rubber cushion thickness change and adjacent structure distance change.Through the experiment found that the seismic response of structures are different under different incentive effect,the influence of building’s acceleration amplification coefficient under EL wave action is larger than sine wave and Wenchuan wave effect;with the increase of input wave frequency,the acceleration amplification coefficient at the top of building also increases under soil-structure interaction and structure-soil-structure interaction,when input frequency approaching the overall model frequency,resonance effect strengthens the seismic response,at this time the monitoring of the building reached the maximum acceleration amplification coefficient;with the increase of the thickness of cushion rubber particles and adjacent structure distance,the monitoring points of the acceleration amplification coefficient decreases gradually,indicating that isolation effect of rubber particle cushion gradually improve.Based on experimental study on the ground space,we further research the isolation effect of basal rubber particles cushion under soil-structure interaction and structure-soil-structure interaction in slop field by using the finite element numerical simulation method.we obtain the building’s isolation response rules of slope field under the seismic load,which provides the theoretical basis for the seismic isolation design in slop field.The rubber cushion can effectively dissipate seismic energy,reduce the seismic response of the building.It is suitable for the low and multistory masonry structure and frame structure building in vast rural areas of China for the advantages of low cost and environmental protection.Hence,the rubber particles cushion isolation method has good economic and social benefits.