Seismic Analysis Of Embedded Frame Rocking Wall Structure

Frame structure is composed of beam and column,it’s a bearing structure composed of just answer or hinged connection. Previous earthquake damage shows that concrete frame structure layer yield mechanism occur easily,plastic hinges will appear at the bottom,and they will cause structure lose bearing capacity.People through the study of damage of structure in the earthquake,obtained the ideal mechanism of injury, "strong columns and weak beams",and there ara many rules of the "strong columns and weak beams" in many specifications.The failure mechanism will frame structure of the beam end and column at the bottom of the column foot or the the top column pillars as expected in injury.In the earthquake,the plastic hinges appear in the expected area,through the deformation of plastic hinge of hysteresis consume the earthquake energy,reduce the damage to the structure.Frame by attaching swing wall formed a new type of structure system,the new structure system control the lateral deformation mode of the structure through the walls’ limited turns,prevent local failure,make the structure more uniform deformation between the layers,avoid layer yield mechanism,make the structure as a whole function,achieve the effect of the aseismmic.Swing wall frame structure is divided into the case and embedded, the embedded rock wall’s bottom hinged with the foundation and there is a certain rotation capacity. Its upper and frame beam are fixed for avoiding the complex connection constructed between the walls and the framePrevious earthquake damage shows that walls and slabs are important for seismic performance of structure.In this paper,the model established based on the wall of the beam bar in BAC model,the model can take into consideration the mechanical properties of walls or slabs both in plane and out of plane.The rock wall in the model is composed of beams and columns.The geometric parameters of each member can be determined simply by equivalent stiffness combined with the original dimensions of wall or slab.The physical characteristics were described directly by material properties of wall or slab. This paper established a six-story concrete frame,and based on the beam bar model framework attached swing wall with different stiffness,use finite element software SAP2000 to analysis the static nonlinear of the structure,observe the structure of the seismic performance.The results showed that:(1)Embedded frame swing wall structure damage mechanism is closer to the overall yield mechanism,effectively improve the frame structure of energy diddipation and seismic capacity.(2)With the increase of swing wall width,stiffness ratio increased,structure have better energy dissipation capacity.(3)With the increase of stiffness ratio,displacement between layers is more uniform,the plastic hinge distribution and the development also more enen,flame reach the requirement of structure can be severe,reduce casualties and the economic loss.