Finite Element Simulation Study Of Follow-up Rubber Bearing Tensile Device

As the isolation technology becomes more and more mature,the isolation technology is more and more widely used.Although the adopted seismic isolation bearing has high vertical compression rigidity,large bearing capacity,small horizontal rigidity and strong deformation capacity.However,its tensile strength is insufficient.In high-intensity areas and buildings with relatively large heights and widths,the seismic isolation bearing is likely to produce a large tensile force,thereby destroying the seismic isolation effect of the rubber bearing.Therefore,it is necessary to increase the tensile strength of the rubber bearing,or reduce the tensile force on the rubber bearing.There are many researches on the tensile strength of rubber bearings at home and abroad,and there are also many tensile devices used in earthquake-isolated buildings.This article proposes that the tensile limit device has vertical deformation and horizontal deformation that affect its tensile capacity.A follow-up type rubber bearing tensile device.The principle of this tensile device is similar to the retractor of a car seat belt,and a finite element simulation study has been conducted on it.Firstly,it introduces the types and mechanical properties of rubber bearings,some existing tensile problems and the research status of tensile devices at home and abroad.On this basis,the analysis method of seismic isolation structure is introduced.The relationship between the acceleration of the support and the axial force is derived,and it is found that when the displacement of the support reaches the maximum and the axial force and the acceleration also reach the maximum.The ETABS analysis example proves that the axial force is maximum when the horizontal displacement of the support is maximum.Then the example data is brought into the ABAQUS rubber bearing finite element model,which proves that the maximum acceleration of the rubber bearing when the horizontal displacement is maximum.Secondly,the basis of the retractor as a tensile device is explained,the principle and composition of the retractor are introduced in detail,and the geometric model,material properties,mesh division,boundary conditions and loading conditions in ABAQUS are explained in detail In order to prevent the retractor from locking when the webbing is moving at a constant speed,the retractor is locked when the webbing speed reaches a certain value.Finally,the finite element analysis of the follow-up tensile rubber bearing is introduced.Firstly,the properties of the connection unit in ABAQUS and the principle of the retractor unit are described.Based on this analysis,specific connection units and parameter settings for the principle of the retractor are obtained.The finite element analysis and comparison of the rubber bearing with and without the tensile device under horizontal shear are analyzed.The horizontal force and the force of the rubber bearing with and without the tensile device are analyzed.Comparison of finite element analysis under vertical force time history.It can be concluded that the tensile device does not affect the horizontal deformation of the rubber bearing,and has good tensile performance.