Seismic Performance Evaluation Of Rocking Infilled Wall-frame Structure

The destruction and collapse of reinforced concrete frame under earthquake are mostely caused by the yield destruction between layers,and the current seismic design requirements of "strong column weak beam",but it is often difficult to achieve in the engineering practice.For this kind of situation,domestic and foreign scholars presents the rocking wall frame structure system,can coordinate the deformation of each layer of frame structure,and avoid forming deformation concentration.The infilled wall is viewed as a kind of structural components under the earthquake,when the infilled wall is uniform arranged,it will have a positive affect on the structure,include the overall stiffness and bearing capacity,etal,but at the same time it reduces the ductility of structure.In this paper,on the basis of predecessors’ research on the rocking wall frame structure,combined with the infilled wall frame structure system,puts forward a innovative structure system,called the rocking infiller wall-frame structure.Through numerical simulation research with SAP2000 and ABAQUS finite element software.A6-story RC frame was taken as the example,adapting the Pushover analysis,constrasted with the rocking infilled wall frame structure and common frame structure model,varifed the feasibility to realize the rocking infilled wall,and analysis of the characteristics of the rocking;Adaping dynamic time history analysis to futher study the characteristics of the rocking under different earthquake intensity,Comparison and analysis for three kinds of structural natural vibration period of the displacement response hysteretic characteristics and energy dissipation capacity.The results show that the horizontal seismic effect is small,the rocking infilled wall is the same as ordinary infilled wall,when the earthquake effect reaches a certain strength,the part of the infilled wall have the effect of the rocking wall;Rocking infilled wall-frame structure has a little influence on natural vibration period;The rocking infilled wall can change the structure layers distribution and make it more uniform,and structure damage failure mechanism into the overall type,effectively improve the performance of the ductility of the frame structure;After rocking,the infilled wall of internal force is less than ordinary infilled wall,damage time later than the ordinaryinfilled wall,and the same time,increasing the structure of the rigid body displacement and reducing elastoplastic displacement;The rocking infilled wall-frame structure in the static and dynamic simulation analysis has good seismic performance.