Experimental Research On The Eccentric Compression Behavior Of Prefabricated Composite Shear Wall

In recent years,with the promotion of urbanization and building industrialization,the complex high buildings have been developed rapidly,which requires more and more shear wall buildings which play the main anti-lateral force in high-rise buildings.In high-rise buildings,with the increase of the building height,the shear wall will expose a series of adverse effects,for example,the size of the components,the weight of the larger,reducing the use area of the building,ductility and energy dissipation capacity.In order to improve the above problems,this paper forms a kind of prefabricated composite reinforced concrete shear wall by reasonably arranging H-shaped steel and square steel pipe and adopting appropriate connection ways.In order to perfect the design theory of this new type of shear wall,the eccentric compression behavior of precast prefabricated combined shear walls is studied.The main research contents and achievements of this paper are as follows:(1)In the paper,eight shaped prefabricated composite shear walls and three ordinary reinforced concrete shear walls with steel ratio,high thickness ratio and eccentricity as test parameters are designed to test Complete 11 shear wall eccentric compression test to analysis of specimen damage morphology and the force characteristics.(2)The influence of steel ratio,high thickness ratio and eccentricity on the eccentric compression bearing capacity of precast composite shear wall is studied.When the steel content increases by 56.25%,the bearing capacity increases by 59.75%;the height-thickness ratio increases by 20%,40% respectively.The bearing capacity decreased by 5.8% and 24.42%,respectively.The eccentricity increased by 33.33% and 66.67% respectively,and the ultimate bearing capacity decreased by 8.27% and 37.44% respectively.(3)Based on the test,a nonlinear finite element analysis was carried out and compared with the test results.The results show that the results of finite element analysis agree well with the experimental results.(4)According to the test phenomenon and the failure mechanism of the specimen,the influence of each test parameter is comprehensively combined with the existing specifications to propose a calculation theory suitable for the eccentric compression of precast composite shear wall.In this paper,the formulas for calculating the bearing capacity of fabricated composite shear walls with eccentric compression are provided to provide the basis for the design of such shear wall,lay the foundation for the widespread application and promotion of this new combined shear wall.