Application And Analysis Of Seismic Performance Of Damped Infill Wall In Frame-core Tube Structure

The frame-core tube structure is widely used by high-rise building and ultra high rise building in the domestic and foreign because of its good seismic behavior.In order to meet the earthquake resistant design of the structure,the frame-core tube structure in high intensity area require a large section size and reinforcement,it increases the cost and the difficulty of the construction.The weight of structure increased is not conducive to the anti-seismic.As a new type of energy dissipation system,Damped infill wall provides a new method to improve the seismic performance of the structure by using the shear hysteresis of the damping layer to dissipate the seismic energy.Based on the previous research result of DIW,the paper analyses the application of DIW in frame-core tube structure from several aspects and put forward some suggestions and conclusions,the main research contents are as follows:(1)the theory of the DIW is studied,and the simplified mechanical model and the analysis of the work mechanism of DIW is introduced,and the parameters of the simulation unit is deduced according to the relevant principle.(2)taking the practical engineering of a 25 story frame-core tube structure as the basic research object,the three-dimensional spatial model of the original structure and the reinforced structure by DIW is established by using the finite element software.Through the static analysis of the two kinds of structures,it can be concluded that the DIW can provide certain lateral stiffness and lateral force,the interlayer displacement angle is reduced and the seismic performance of the structure is improved.The shear force of the frame-core tube structure is reduced,which can effectively protect the main structure from seismic damage.(3)through the time-history analysis of the structure,it can be found that the displacement of the structure can be reduced effectively and the interlayer displacement angle also can be reduced to meet the standard requirements aft er set up DIW.DIW has the function of energy dissipation-seismic reduction by consumed most of the energy.Because of the special form of the DIW,it will not be damaged in advance in the plane.(4)establishing two kinds of structural systems with different types of DIW besides.Through the response spectrum analysis and time-history analysis,the location and quantity of the DIW will affect the seismic performance of the structure.The rational arrangement of the DIW can not only improve the economy,but also increase the safety of the structure.