Numerical Analysis Of Seismic Performance Of Slotted Shear Wall Of Reinforced Concrete

Shear wall is widely used in high-rise buildings as the main component of lateral force resistance.But for the traditional shear wall because of its major level,large lateral stiffness,under strong earthquake,concentrated stress,prone to cracking in the wall,even crushing destruction,so that the seismic behavior of the shear wall decreased,thus affecting the overall structural safety performance.Due to the shortage of traditional shear wall,this paper slotted shear wall,which is in solid shear wall open vertical seams,is provided with a plurality of dampers in the joints,rely on plastic deformation to dissipate seismic energy damper,in order to avoid or reduce the damage to the shear wall,so as to improve the performance of the overall structure of the seismic safety.In this paper,the finite element model of the whole section shear wall,the slit shear wall and the energy dissipation shear wall is established by using the large nonlinear finite element software ABAQUS.The seismic behavior of three kinds of shear walls under cyclic loading and different parameters are compared and analyzed,including failure mode,bearing capacity,hysteretic behavior,stiffness degradation and deformation capacity.The main research contents are as follows:(1)The finite element model is established based on the existing test specimens of the whole cross section.The validity of the established nonlinear finite element model and the calculation parameters are verified by comparing the numerical simulation results with the experimental results of the failure mode,hysteresis curve and skeleton curve.(2)Research and analysis of the slit shear wall,the energy dissipation shear wall and different ratio of height to width of slab column shear wall failure pattern,energy dissipation,stiffness degradation and ductility,bearing capacity,and put forward the reasonable ratio of height to width of slab column joints and placement of damper quantity.(3)Analyzed the concrete strength grade,axial compression ratio and shear wall on both sides of the plate column of steel tube steel ratio have effect on the damage form,energy dissipation,stiffness degradation and bearing capacity of the slit shear wall and energy dissipation shear wall,and made a more reasonable axial pressure ratio,concrete strength grade and steel pipe ratio.(4)Analysis of slotted shear wall horizontal lateral stiffness and puts forward the analysis model,discusses the maximum bearing capacity with energy dissipation shear walls.Through the above analysis concluded that the seismic performance is better than the slotted shear wall the entire section wall.The number of joints of damper should be based on whether the plastic deformation ability and give full play to its proper settings;The combination of high axial compression ratio and high strength concrete with low strength can make the seismic performance of energy dissipation shear wall optimal;The addition of steel pipe not only improves the bearing capacity of the specimen,but also significantly reduces thestiffness degradation rate of the specimen and enhances the stability of the later stage of seismic action.Therefore,it can provide theoretical basis for the future design of the energy dissipation shear wall.