The Study Of The Performance Isolation In Effect Of Isolation Derailing On Layer Structure

The base isolation in the latter part arise from the late of the last century. It is aneffective technology for earthquake disaster reduction. Its essence is separated fromthe upper structure and may cause damage of earthquake ground motion. Thisdecoupling is achieved by increasing system flexibility. The main measures installedin the structure at the bottom of the isolation device. Barrier ground movement uppass to the structure of the department.So isolation layer of the base isolated structureplay a crucial structural damping function. In recent years,because of the rapiddevelopment of isolated structures, some employees in its working principle is lack ofknowledge that in the design or construction process of the isolation layer at thebottom occur some error. impact the damping effect of the structure.At home and abroad, yet scholars to make the statistics of base isolated structure.Proposed construct error corresponding to the structural parameters of a quantitativeindex. Engineering practice, the isolation layer structure is not normative backgroundand object.From a structural point of view for the structural research, combined withthe dynamic response analysis, based on collected about ten species of the type ofconstruct imprecision extensive research on domestic and international isolationworks. Using SAP2000software finite element model to determine the structuralparameters of the selected seismic waves to adjust to fit the finite element model ofthe environment in which to establish the equation of motion of the bi-directionalhorizontal earthquakefinite element model.Analysis seven kinds of common isolationlayer constructing an incorrect upper structural dynamic response.At the same time, introduction demonstration experiments, to analog isolation layerstructure is not accurate. When earthquake came, the response of upper part of theseismic when isolation layer structure is not accurate. To verify the results of thefinite element analysis.Finite element analysis and demonstration experiment results show that whenisolation layer structure is not accurate, the stiffness of the isolation layersignificantly increased. Layer displacement and acceleration of the upper part of theisolated structure is also significantly increased. Isolation device does not play itsproper isolation effect. When the earthquake came to,it have a greater damage on thestructure. When there is only one error accour in the Isolation layer of construction,itwill impact on the entire structure of the isolated effects. So，the isolation layerstructure is not the accuracy of the isolated structure damping performance can not beignored.