Damage Control Of Edge Members In High-rise Shear-wall Structure By Employing Dampers

Compared with general buildings,people intuitively think that high-rise buildings have lower seismic safety,and historically the high-rise buildings have much less earthquake damage,and engineers have limited knowledge of high-rise buildings’ seismic performance.Due to the high center of gravity,under the action of horizontal earthquakes,high-rise buildings will be subjected to large overturning moments,which will be converted into additional axial forces on the bottom edge components.Limited examples of earthquake damage have indeed exposed such problems.How to overcome the influence of additional axial force is the main challenge facing the seismic design of high-rise buildings.Aiming at this problem,this paper first summarizes the related earthquake damage,and then explores the effectiveness of a design method to overcome the adverse effects of additional axial forces through experiments and numerical simulation methods.The main results of the paper are as follows:(1)Summarized the seismic damage characteristics of high-rise buildings,and pointed out that as far as the main structure is concerned,the high-rise shear wall structure is mainly crushed or damaged by bottom edge members under strong earthquakes;(2)For a shear wall with a crushed edge member at the bottom of a high-rise shear wall structure in Chile,a wall model was designed,and a four-column test machine was used to perform a unidirectional compression test,and a testphenomenon that was consistent with the real situation was obtained;(3)Based on the analysis of the force and measured deformation in the experiment,the whole process of deformation and failure of the compression shear wall is characterized,and the parameters describing its ultimate bearing capacity and deformation capacity are obtained;(4)An anti-vibration strategy is proposed.Advanced displacement-driven dampers are placed vertically in the bottom edge shear wall,and nonlinear seismic simulation analysis is performed through ETABS software.The seismic design of high-rise shear wall structures in the intensity area provides new ideas.