Structural Design And Analysis Of Experimental Framework Model With New Sliding Isolation

Base isolation is a kind of effective,economic and feasible technology to reduce theseismic response of structures.It protects structures away from seismic impaction byseparating the structure and the base so that the seismic energe can’t transmit.Theresearch of isolation theory, isolator invention and isolate structure system has beenstarted in our nation from1960s,and also has been used in some buildings.Frictionsliding isolation was researched at the earlist because of its simple composition, lowprice and effectiveness.Then we establish the analys theory for isolation system,and useit in masonry—concrete structure which is low,with big height to width aspectratio.Recently, high-rise buidings appear with the economy speedily grows.So,how touse the base isolaton in higher frame structures become a question.Firstly,the theory of Structural Vibration Control,the development and recentresearch of base isolation,the construction and principle of different isolators areintroduced respectively. On that basis,a new kind of friction isolation which uses solidlubricant MoS2as paintcoat is presented and designed.Also, a kind of simplified modelfor base isolation structures and its computing method are explained.Secondly,theperformance of the isolator with new lubricant material is tested by the MTSelectro-hydraulic servo test system,and also the value and modification of frictionalfactor is analyzed. Then,the simulate method of construction member, filling component,live loads, reinforcement’s area is discussed. Similarity relation between the structureand model is established.After that a five stories ferroconcrete experimental frameworkmodel is designed.At last,the finite element model of the experimental framework modeis analysed by ABAQUS.The main laws of the displacement and acceleration of thestructure with base isolation or not are analyzed under different conditions,whichinclude three types of seismic waves and three types of intensities.The influence of frictional factors variation and2D seismic impaction to the seismic response ofstructure are discussed.Study results indicate that the MoS2paintcoat has high vertical bearing capacity andlow frictional factor.The new isolater has extensive application prospect because of itseffective performance and simple construction.The experimental structure’s naturalmode of vibration has been changed observably by using base isolation.When thefrictional factors is0,the superstructure shifts as a whole. The difference is when thefrictional factors is from0.05to0.1, the natural period of vibration of base isolationstructure system is lengthened,but it hardly influenced by the change of frictionalfactors. The change of frictional factors can obviously influence the seismic response ofsuperstructure,the lower frictional factors can reduce the relative storey displacementand acceleration of superstructure but leads to a large displacement at isolation layer.Isolation layer is relative rest while seismic is feeble, simultaneously the shearing forceof isolation layer changes as ground motion. To the contrary,it almost is invariant.The results also show that,when experimental model structure sufferes fromtwo-horizontal earthquakes,the displacements at both direction increase but the relativestorey displacements and acceleration decrease.When there is vertical earthquakes, thedisplacement of experimental model structure increases, however the relative storeydisplacement and acceleration are almost the same as that the model only sufferes fromone-horizontal earthquakes.