Study On Seismic Behavior Of ECC Double Steel Plate Concrete Composite Shear Wall

In the study and calculation of seismic capacity,the research on the existing earthquake damage shows that the traditional reinforced concrete shear wall is often the top failure of the shear wall bottom when facing the seismic reciprocating load,so the deformation capacity is generally improved by strengthening the bottom structure.When the reinforced concrete shear wall structure is damaged,the ordinary concrete material has poor performance,and there will be deformation residual after earthquake damage.Therefore,in the process of structural design,the most important thing to strengthen the seismic capacity is to improve the deformation capacity and bearing capacity of the shear wall bottom.With its superior lateral resistance,good bearing capacity and seismic capacity,double steel shear wall has been widely used in high-rise and super high-rise buildings in recent years,and has been more and more used and studied.ECC material,as a new type of high fiber cement-based composite,has good ductility and durability in construction engineering compared with other building materials,and can play a strong seismic capacity in structure.At present,there are many tests on the seismic performance of double steel shear wall,but there are few researches on ECC applied to the structure of double steel shear wall.Therefore,this paper mainly studies the influence of ECC material on the seismic performance and bearing capacity of the whole structure.The following are the contents of this paper:1.Verify the feasibility of using ABAQUS software to calculate the seismic performance of the composite shear wall with double steel plate concrete.Through the existing experiments,the corresponding finite element model is established,and the error of the seismic performance of the two is compared and studied.The results show that the error is small.Therefore,the seismic performance of the structure can be effectively simulated by ABAQUS software.2.In this paper,ECC double-steel concrete composite shear wall is established by ABAQUS software.ECC material is used at the bottom of the composite shear wall instead of concrete.Compared with the common composite shear wall,the structure with different height ECC material is established to confirm the most suitable ECC height.The analysis results show that ECC double steel concrete composite shear wall is relatively similar to each other In the ordinary double steel plate concrete composite shear wall,its seismic performance has been improved significantly,and the ECC height at 10% has the best seismic performance.3.The ECC double-steel concrete composite shear wall with ECC height of 10% is established.The seismic performance of the structure under different parameters is studied by changing the parameters of axial compression ratio,steel plate strength and ECC strength.The results show that ECC double-steel concrete composite shear wall has the best performance when the axial compression ratio is 0.5,but the overall influence of the strength of the steel plate and ECC on the structure is not significant.4.Based on the ECC double-steel concrete composite shear wall,the concept of constraint type is introduced.Through the opening of steel plate on the upper part of the structure,the steel plate in the structure mainly bears the role of restraining the internal concrete structure,which does not bear the vertical load directly.The results show that the load-bearing capacity and deformation capacity of ECC double-steel concrete composite shear wall are improved,and the energy consumption capacity is increased,and the performance is the most superior when the width of the joint is 2%.