Seismic Performance Analysis Of Different Types Of Laminated Shear Wall With Different Edge Constraints

In recent years,the strength,of urban construction and development have been speeded up,and the construction of housing has been developed unprecedentedly.The laminated slab concrete shear wall structure system,as a new structural system,relies on its notable advantages,such as low cost,faster construction speed and less environmental pollution.It plays an important role in China's sustainable development and resource shortage.At the same time,as a high-rise structural member,it is very important to study the structural failure and seismic performance of the laminated slab concrete shear wall.In this paper,the ABAQUS finite element software is used to simulate the failure mechanism and seismic performance of the laminated plate shear wall with different boundary constraint types:The nonlinear dynamic analysis and pushover theory by theoretical calculation,based on the HeFei University of Technology's Laboratory of different boundary types of superimposed slab shear wall low cyclic loading test,using ABAQUS finite element model is established to analysis the developing process and failure modes,skeleton curves and stress superimposed slab shear wall cracks,bearing so,compared with the experimental data through the finite element simulation results verify the validity of the model.To analyze the failure mechanism and seismic performance of shear walls under different conditions.According to the different boundary constraint types,divided into 4 different types of boundary constraints,including structural reinforcement of the column and column end stress,reinforcement of the concealed columns and column end,also compared with the cast-in-situ slab of the same size.Which concluded that different boundary types of superimposed slab shear wall and slab no big difference in terms of bearing capacity,stiffness degradation,ductility performance and energy dissipation,the superimposed slab shear wall structure can be basically equivalent to the cast structure,the boundary constraint force to reinforced laminate than the structural reinforcement of bearing capacity of composite slab.The superimposed slab shear wall structure with different height width contrast ratio,axial compression ratio,concrete strength,wall damage analysis,reinforcement stress nephogram,hysteretic curve,the edge can be obtained by different types of constraints of the superimposed slab shear wall stress,bearing capacity,stress state and failure state bigdifference.When the aspect ratio is 1.7,the laminated wall panels are mainly subjected to bending and shear.When the aspect ratio is 1,the laminated wall panels are mainly subjected to shear.When the width to width ratio is 2.1,the laminated panels are mainly subjected to bending.The change of aspect ratio has a great influence on the cracking modes and failure modes of concrete shear walls.With the increase of aspect ratio,the cracking mode is mainly from shear crack to bending crack,and the failure mode also changes from shear compression failure to bending failure.Under certain conditions,the lateral stiffness and horizontal bearing capacity of composite slab shear walls are favorable under certain axial loads.But beyond this range,brittle fracture occurs in the shear walls.The concrete strength has little influence on the superimposed slab shear wall structure,the different strength grade of concrete superimposed slab shear wall bearing capacity,failure mode,stiffness degradation are basically the same,high strength concrete model has better than concrete strength model of low energy dissipation capacity..