Research On Seismic Performance Of Steel-steel Concrete Composite Wall Considering Bond-slip

With the rapid development of my country’s economy,the development and construction of super high-rise buildings has also achieved world-renowned achievements.The higher the height of the building,the greater the lateral force will be affected by force majeure such as earthquake and wind.The main function of the shear wall is to withstand the lateral force.Therefore,in the scientific research of high-rise buildings,the shear wall is irreplaceable.Status.Compared with the traditional cast-in-place concrete shear wall,it has many shortcomings,construction is difficult,and the cost is high,which cannot meet people’s ever-growing beautiful needs.The fabricated shear wall structure can be prefabricated in the factory,and then transported to the place where it is needed for on-site installation and use.my country is also vigorously developing fabricated shear wall structures.Therefore,a new type of fabricated steel-steel concrete composite shear wall has appeared,which has the advantages of light weight,strong earthquake resistance,low cost,and reliable quality.It has been studied in depth,and its seismic performance is analyzed.It is of great significance to improve and evaluate its seismic performance.In the study of composite steel-concrete composite shear walls,the bond-slip characteristics between steel and concrete are rarely considered.Bond-slip characteristics are a factor that cannot be ignored when studying the seismic performance of composite shear walls.Mobile characteristics are considered from the following three aspects:(1)This paper theoretically analyzes the mechanism of the bond-slip of steel-shaped concrete,analyzes the stress distribution law of the bond-slip between steel and concrete on the connecting surface,summarizes the main factors affecting the bond strength,and analyzes The related bond-slip constitutive relationship is intended to provide a theoretical basis for the establishment of the finite element model below.(2)Based on the relevant data of the CSW01 specimen verification test,a finite element model with exactly the same test parameters was established in ANSYS,and compared with the test results to calculate the error;the finite element model considering the bond slip was established in ANSYS The meta model verifies the scientificity of the model by analyzing the differences between the three.(3)Using axial compression ratio,shear span ratio,section steel size and wall thickness as variables,the seismic performance of shear walls under low-cycle loads is analyzed,and the ductility,stiffness degradation performance,structural bearing capacity and energy dissipation capacity of the structure are analyzed.A comparative analysis is carried out and the following conclusions are drawn: the increase in axial compression ratio increases the shear resistance and load-bearing capacity of the shear wall,but the shear resistance and energy dissipation capacity of the excessively large shear wall will cause it to be compared with concrete The increase in shear span ratio will reduce the bearing capacity and lateral stiffness of the shear wall,and slightly increase the bearing capacity and lateral stiffness of the wall;the increase in the size of the section steel will make the shear wall Shear resistance and lateral rigidity have been improved,but too large will lead to incoordination with concrete;an increase in wall thickness will significantly increase the shear resistance and lateral rigidity of the shear wall.