Nonlinear Earthquake Response Analysis Of Steel Reinforced Concrete Composite Structure

Steel reinforced concrete composite structure is a composite structure formed by the combination of steel which reinforced concrete structure and reinforced concrete structure.It makes full use of the material properties of steel reinforced concrete and reinforced concrete,and has gradually been widely used in large span and super high-rise buildings in seismic prone areas with the advantages of small components,low cost,flexible structure layout,high bearing capacity and good seismic performance.A 18 story steel reinforced concrete composite structure is selected as an example to study and analyze.The composite structure has 18 layers of Twin Towers frame shear structure on both sides of the South and North,and the steel reinforced concrete structure with 6 layers in the middle of Twin Towers.The following work has been done according to the scheme:1)Two kinds of research models of steel reinforced concrete composite structure and pure reinforced concrete structure are established by using the finite element analysis software SAP2000.And their structural characteristics are researched by consulting relevant data.2)3 seismic waves are selected,and the time history analysis of two models is carried out respectively under the action of rare earthquake,the differences are analyzed and compared which is the maximum inter story displacement,maximum inter story shear force and so on under different conditions.3)By comparing the 2 models' the change of displacement,shear and so on under the action of 3 seismic waves,we can see that under the same conditions,the maximum inter story displacement of steel reinforced concrete composite structure is reduced by 181.95 mm,and the maximum inter laminar shear force is reduced by 20.4%.The results show that the steel reinforced concrete composite structure has better ductility and seismic performance.