Theoretical Study And Finite Element Analysis Of Shear Capacity Of SRC Low-Rise Shear Wall

Shear wall,as the main anti-lateral force component of the building structure,plays an irreplaceable role in protecting the safety of the building structure.Once the shear wall structure was damaged,it will directly affect the safety performance of the building.In daily building structures,low-raise shear walls with small shear span were often used.This type of shear walls has the advantages of high stiffness and strong shear resistance,but also has the disadvantages of poor ductility and insufficient energy dissipation.In order to make up for the shortcomings of the low shear wall,the researchers from all over the world have found that adding vertical section steel into the constraint area at both ends of the ordinary concrete shear wall to form low-rise SRC shear wall can greatly improve the mechanical performance of the low-rise shear wall.But,at present in view of shear bearing capacity calculation method of the low-rise SRC shear wall still lacks a clear significance of mechanical model.This article through to analysis the low-rise SRC shear wall damage model and mechanical characteristics,puts forward the suitable for calculating the bearing capacity of low-rise SRC shear wall softened membrane model "shear model".Additionally,the author writes a suitable for calculation process softened membrane model in this paper,through the Matlab program to calculate the relationship of low-rise SRC shear wall transverse between shear stress and shear strain.Then the relationship curve of the bearing capacity and displacement was calculated,and the calculated results and experimental results are compared,so the correctness of the theoretical model is verified.Then,the softened membrane model is further optimized,considering the influence of repeated load,the shear capacity after reduction is compared with the calculated value and test results of the specification,and more reliable calculation results are obtained.Due to low-rise SRC shear wall belongs to the typical shear failure,it has always been the difficult problem in the finite element numerical simulation.The author find that put into use the layered shell element of Marc finite element platform for low-rise SRC shear wall to establish finite element model,and adaptation of Oral Buyukozturk elastic-plastic strengthening criterion analyzes concrete,and the calculated load-displacement curve and test skeleton curves coincide well.In this way,it can better simulate low-rise SRC shear wall mechanical characteristics.The influence law of axial compression ratio,concrete strength,web reinforcement ratio and section steel placement on shear capacity of low-rise SRC shear wall is obtained by using Marc finite element software.