Dynamic Analysis Of Energy Dissipation Of Frame-shear Wall Structure

In the field of civil engineering,the ability of a structure to resist earthquakes is an important parameter of its security.Traditional buildings improve the structural strength and increase the stiffness to resist the negative effect of the earthquake.However,under the action of earthquakes,the weak parts of structures are prone to damage,which is not conducive to the normal use of the structure.As a state-of-art technology,seismic energy dissipation is one of the most significant design methods for structural earthquake resistance.This technology uses energy dissipators to consume the seismic energy which reduces the earthquake effect borne by the main structure and protecting it from damage.In the structure of energy dissipation and damping,the viscous damper has the advantages of clear working principle and good damping effect.This paper first discusses the basic principles and characteristics of engineering structure vibration control and energy dissipation technology.After that,we introduce the structure,connection method,calculation model,parameter,quantity and layout optimal principles around the viscous damper.It is found that the reasonable arrangement of viscous dampers in the damping structure is the key to fully exerting the damping performance of the dampers.Therefore,this paper focuses on the influence and promotion of various arrangements of viscous dampers on the damping effect of structures.Here,we take a 12-story frame-shear wall structure as an example.Firstly,choose four conventional viscous damper layouts which are uniformly arranged,partitioned,or concentratedly arranged in the lower 6 or upper 6 layers of the structure.Then,in order to further reduce the interlayer displacement of the damping structure,the paper optimizes the uniform layout and proposes three optimization schemes: weight coefficient layout,layer-by-layer layout and sequential search layout.Finally,SAP2000 software was used to establish the damping model and the structural model of each scheme.The EL-Centro wave,CPC-Topnaga wave,and LAN wave data are input.The FNA method was used for time-procedure analysis.The displacement,interlayer shear force,interlayer velocity and interlayer acceleration are compared and analyzed to find the laws and characteristics of structural energy dissipation and verify the effectiveness and feasibility of the optimized layout scheme.The research shows that compared with the original damping structure,the displacement,interlayer shear force,layer velocity and layer acceleration of each shock-absorbing structure with viscous dampers are significantly reduced.After the viscous dampers are arranged on the structural layer,the interlayer displacement of the layer and adjacent layers above and below are reduced.The three optimization schemes achieve the optimization purpose of controlling the displacement between layers,and the sequential search method has the best control effect.The optimization schemes verify that the transfer of the viscous damper to the weak part can significantly enhance the damping effect,which can be used as a reference for designers.