Study On Seismic Behavior Of Rubber Damping Wall

As a common structure form, the infilled wall frame structure has been widelyapplied in industrial and civil buildings. During the aseismic calculation of infilled wallframe structure, the infilled wall of frame structure is often regarded as non-structuralelement. When considering its influence on stiffness and cycle of the frame structure, theinfilled wall is often seen as a kind of external load and be imposed on the frame. After alarge number of earthquake survey, it has been found that the infilled wall of framestructure actually influenced and participated in the deformation of the frame structure.The existence of the filler wall increased resistance to lateral stiffness of the structure andchanged the structure of the natural period of vibration. Concrete component failure andthe overall frame structure damage caused by the stiffness effect of filler wall are alsofound in previous earthquake disasters.As a kind of viscoelastic material, rubber materials have good features such as strongelasticity, large elastic deformation and well blocking performance. Rubber materials havebeen widely used in structural engineering. Adding rubber damping layer in the filler wall,which will change filler walls into energy dissipation damping element can effectivelyreduce the displacement and stress responses of frame structure under seismic loading. Itwill also provide a better protection of concrete members and improve the seismicresistance of frame structure.Based on theoretical analysis of nonlinear and energy consumption characteristic forthe related materials, numerical models of the common filler wall frame and dampingfiller wall framework have been established by using finite element software ANSYS.Nonlinear analysis and elastic dynamic analysis of the two frames under one-wayhorizontal load and earthquake load are also been carried out. When taking the stress anddisplacement in process as the main indexes, it turned out that:（1）Under the effect of horizontal unidirectional loads, the nonlinear characteristicsfor displacement and stress of ordinary infilled wall frame and rubber damping infilledwall frame are obvious. The existence of rubber damping layer can obviously reduce the displacement response of structure. The existence of the damping layer effectively blockedthe formation of compressive zone, avoided the formation and development of filler wallcracks, ensured the integrity of wall in the deformation process，which finally enhancedthe lateral resistance of the filler wall framework.（2）Under earthquake load, shear deformation of rubber damping materials firstoccurred, dissipated the energy inputted into frame structure, reduced the displacementresponse under seismic action. The existence of the damping material layer makes layeredmasonry infilled wall, the whole of the filler wall is lower than ordinary filler wall, whichfinally leads to integral stiffness, extended cycle of infilled wall frame structure andreduced seismic response.