Nonlinear Finite Element Analysis On The Seismic Behavior Of High Strength Stirrup Reinforced Concrete Shear Wall With Boundary Columns

High strength steel bar has the advantages of high strength,good ductility,low carbon content,easy welding and so on.Shear wall becomes an indispensable part of the high-rise building because of its large lateral stiffness and good seismic performance.But so far,domestic and foreign scholars have focused on the research of high strength reinforced concrete shear wall,such as beam,column,joint and so on,the research on its seismic performance is not much.Therefore,this paper is of great significance to study the seismic behavior of high strength reinforced concrete shear wall.According to the present research status as well as the project background,this paper adopts nonlinear finite analysis and gets the following results:1.Finite element analysis of reinforced concrete structure and nonlinear analysis and this paper introduces the factors that need to be considered in establishing the finite element model of reinforced concrete structure and the common material constitutive relation of reinforced concrete structure.Some characteristics of plastic damage model of concrete are discussed.At the same time,this paper introduces the large finite element software ABAQUS and how to consider the nonlinear analysis in this software.2.High strength reinforced concrete shear wall under low cyclic load test and finite element analysisLow cycle repeated load test of 3 concrete shear wall components with HRB600 grade high strength steel bars.Appropriate stress-strain curves of reinforcement and concrete,failure criteria were chose.Finite element analysis software ABAQUS was used to set up the model of high strength reinforced concrete shear wall to analyze the bearing and deformation capacity of the wall.Comparing the results of finite element analysis with test results,they are in good agreement.Errors of all key points of stress,displacement and ductility coefficient were all within the acceptable range.3.Analysis of seismic performance parameters of HRB600 high strength stirrup Configuration in the end column of reinforced concrete shear wallIn this paper,based on the third chapter,the finite element model has been verified to establish a finite element model.Study on the effect of strength grade,axial compression ratio,stirrup strength grade of concrete parameters such as bearing capacity and ductility of the seismic performance of high strength reinforced concrete shear wall.At the same time,the research results of this paper give some opinions and suggestions on the application and design of high strength reinforced concrete shear wall in practical engineering.Analysis shows that ultimate bearing capacity,ductility coefficient were increased with the increase of stirrup strength grade of the shear wall,the seismic performance of the structure better;the ultimate bearing capacity of the shear wall is gradually improved after increasing the axial compression ratio and the strength grade of concrete,but the important performance parameters such as the limit displacement and the ductility coefficient decrease gradually.