The Seismic Performance Research Of Mountain Multilayer Grounding Away Can Shock Absorption Frame Structure

So far, through the joint efforts of the scientific research scholar, has been indynamic soil-structure interaction has made a lot of achievements. But these results inthe most is plain, the special field research is still lacking. In our country, abouttwo-thirds of the land is mountain and hill, and other special terrain, a large number ofbuildings were built in the various types of terrain. So the special field on seismicresponse of the structure has an important significance. In recent years, shockabsorption technology away can widely used in all kinds of engineering. But, in thestructure away earthquake-reduction design, is to assume that most of the upperstructure and the foundation is consolidation, ignore the soil-structure of the interactionof the complexity, the more did not consider the particularity of the site, and turned toshock absorber can provide rigidity and damping, cause structure characteristics change,so the rationality of the design method is worth discusses. So, carry out special placeson earth-back to consider shock structure of the interaction of the study is verynecessary.First established by ANSYS software basal consolidation frame structure of the3dmodel, and the structure of the installation of viscoelastic dampers, through to the twodifferent peak acceleration of input structure seismic wave, analyzes the viscoelasticdampers to structure seismic response of influence; Then discusses the boundary of pileand soil contact problem, based on pile of the interaction of the earthquake responseanalysis, discuss the flat ground and platform in different field cover when theearthquake response of the pile soil; Finally, a flat field and multilayer grounding twokinds of ground of pile soil-structure interaction3d model, analyzes the conditions ofthe soil, the ground cover elastic modulus, viscoelastic dampers and seismiccharacteristics of the structure seismic response of influence.Through numerical analysis of this paper, summed up the following conclusions:(1) with the analysis model of viscoelastic boundary in calculation accuracy and far onthe border is close to buy, but its takes up the computer’s resources and consumption ofcomputing time than far buy boundary;(2) in the pile-soil interaction model, the seismicresponse of the top of the pile is similar, the biggest pile top acceleration response isinput model peak acceleration seismic wave1.4times or so; The cover of the soilmodulus increases, of seismic response of the pile head is reduced, the displacement of the pile along the depth change more even,(3) considering soil-structure interactionafter, structure and frequency decreased; Set viscoelastic dampers after, structure andfrequency is increased;(4) viscoelastic damping of the earthquake response of thestructure of the control effect is good; Along with the increase of seismic wave peakacceleration input, viscoelastic dampers control effect is better;(5) site covers the soilmodulus increases, the earthquake response of the structure has reduces, viscoelasticdampers control effect is better;(6) viscoelastic dampers flat field the earthquakeresponse of the structure control effect of multilayer grounding than good; Andmulti-layer grounding of seismic response of the structure, compared to cover the elasticmodulus of the soil to flat field structure of seismic response of the more.