Seismic Reliability Analysis Of High-rise Shear Wall Structures With Replaceable Coupling Beams

With the shortage of urban land,high-rise buildings have developed rapidly,and shear wall structure is one of the most widely used structural forms in high-rise buildings.Connecting beams,as a component connecting shear walls,can protect the wall limbs,but they are prone to shear failure under earthquake,but it is difficult to repair them after earthquake.In order to solve this problem,based on the viscoelastic shear energy dissipation damper of composite dentate steel plate proposed by our research group,this paper puts it on a 15-story frame-tube structure and studies its structural reliability under earthquake action.The main contents are as follows.:(1)The research status of replaceable connecting beams is introduced.The composite tooth-shaped steel plate damper proposed by our research group is simulated in finite element design software ANSYS by using equivalent stiffness coefficient and equivalent damping coefficient..(2)By analyzing the probability distribution of seismic intensity,the expression of the probability distribution of seismic action is obtained,and the influence of structural size,material and other random variables on the seismic reliability of the structure was studied.And the seismic reliability of the structure under different levels of earthquake was also studied.(3)Using ANSYS finite element software,the traditional structure and the structure with composite coupling beam damper are modeled by finite element method,and the command flow of seismic reliability calculation is compiled by APDL parametric design language.(4)According to the requirement of structural design for normal service limit state,the limit state equation for calculating seismic reliability of structures is established with the maximum inter-story displacement angle as the limit condition.(5)Using the Monte Carlo method based on Latin hypercube sampling,the seismic reliability of the original structure and four structures with different locations of connecting beam dampers under normal service limit state is calculated.(6)Aiming at the difference of the reinforcement ratio and the eccentricity of the shear wall structure in the actual project,the influence of the reinforcement ratio and the wall eccentricity on the seismic reliability of the structure under different conditions was studied.