Seismic Performance Analysis Of A New Frame-shear Wall Dual Structure System Based On BRB Energy Consumption

The dual structure of the traditional frame shear wall is widely used in the seismic structure system of the building,but the reinforced concrete continuous beam is prone to brittle shear failure and insufficient ductility capacity under the action of earthquake.In view of this problem,this paper presents a new type of framework shear wall Intelligent Dual structure system,the basic idea is to replace each floor of reinforced concrete beam into a ductile deformable energy dissipation unit BRB,using the frame and shear wall structure under the action of horizontal earthquake "shear type" and "bending type" of different deformation patterns,The BRB at each floor has relative motion and energy consumption,which greatly reduces the floor horizontal acceleration and seismic response of the structure,thus improving the seismic performance of the whole structure system,and realizes the replaceable damage unit,and the structure function can be restored to the design.In this paper,three seismic waves are selected,and the elastoplastic dynamic time History of a typical 6-layer traditional frame shear wall structure and corresponding intelligent frame shear wall in Lanzhou area is analyzed by finite element analysis software ABAQUS,with emphasis on different parameters BRB,The control effect of different frame and shear wall structure against lateral shift stiffness ratio and different BRB arrangement mode on seismic response of intelligent dual structure system mainly draws the following conclusions:The influence of different parameters of BRB on the dynamic response of intelligent dual structure system is analyzed.With the increase of BRB yield load(initial stiffness),the seismic response of intelligent dual structure system decreases first and then increases,and there exists the BRB design parameter of reasonable value,that is,when the BRB yield load(initial stiffness)value is within the 5%Fy~20%Fy range,Compared with the traditional structure,the seismic response of the intelligent dual structure system is obviously reduced,and when the yield load(initial stiffness)of BRB is 10%Fy,the intelligent dual structure system has the best control effect on its own seismic response,and the maximum floor acceleration can be reduced by 45.72%in the range of the BRB parameter values analyzed.(2)The new intelligent dual structure system is compared with the traditional frame shear wall structure,when the yield load of BRB is set to the traditional frame shear wall structure with beam,the stiffness is small Yulianliang,and the lateraldisplacement of each layer of the intelligent dual structure system increases,but when the value of BRB yield load is in a reasonable interval,the energy consumption of BRB and " The "cutting-off" mechanism reduces the peak acceleration response of the whole structure,so the lateral displacement of the intelligent dual structure system can be effectively controlled and meet the requirements of the specification for the deformation of the whole structure.(3)The influence of three kinds of frame and shear wall structure on the dynamic response of intelligent dual-structure system is analyzed.The change trend of dynamic response peak of new intelligent structure system with BRB parameter is the same as that of(1),in addition,in the case of calculation in this paper,the seismic response decreases gradually with the increase of lateral shift stiffness ratio between shear wall and frame structure,but the difference of reduction amplitude is not greater than 10%.Therefore,under the relative stiffness of the common frame shear wall structure,the influence can not be considered when designing the intelligent dual structure system.(4)The influence of the BRB parameters on the dynamic response of the intelligent dual structure system is analyzed by the uniform arrangement of the height of the structure and the arrangement of the inverted triangle.The trend of seismic response of uniform distribution structure with BRB parameters is basically the same as that of inverted triangle distribution,and the change trend is the same as(1),and the lateral displacement of BRB uniform distribution model decreases obviously by comparing the seismic response of 10%FyBRB intelligent dual structure system with uniform distribution and inverted triangle distribution of BRB.Control of weak layers has improved.