Study On Seismic Performance Of Steel-tie-columns

Constructional column are important seismic measures in infill walls with frame structure,However,the traditional cast-in-situ reinforced concrete columns due to complex processes,construction technology requires a variety of reasons,leading to the structural quality of the construction column is not ideal,a direct impact on the performance of its seismic performance,In addition,the construction period of cast-in-place reinforced concrete structural columns is long,and the waste of the commonly used wooden formwork is very serious,which is not in accordance with the direction of the development of assembly-type buildings and green buildings.The use of steel-tie-columns that can be quickly installed on site can improve the seismic performance of infilled walls,speed up the construction,facilitate the assembly of constructional columns,avoid the waste of wood,protect the forest and meet the development direction of green building,Therefore,research steel-tie-column,with some practical significance and project promotion value.This paper analyzes and studies the seismic performance of light steel structural columns based on the “ Research on Application of Lightweight Steel Structural Columns with Laminated Filled Walls”(2016-K5-039).According to the test results and finite element numerical simulation,light steel is used.Analysis of the seismic performance of the structural column,the main work is as follows:(1)Through the analysis of the steel-tie-column in situ test,it is found that the steel-tie-column has higher strength than the concrete constructional column,and the tensile reinforcement exerts more restraining effect in the steel-tie-column specimen.The constraints of the body are effective.Both constructional columns have good restraint on the wall.(2)ABAQUS was used to simulate the in-situ experiment of steel-tie-column by finite element method.The simulation results are in good agreement with the experimental results,which verifies the scientificity of finite element numerical simulation and the accuracy of test results.The ABAQUS numerical simulation of two kinds of columns filled with different sizes of columns filled with constructional columns shows that the wall height,length and thickness affect the seismic performance of the steel-tie-columns.The numerical results show that the three factors affect the ultimate load carrying capacity The greatest impact is the wall thickness,followed by the height of the wall,wall length less affected.As the height of the wall increases,the ultimate bearing capacity of the two kinds of constructional columns shows a downwardtrend.When the height of the wall is not less than 3.0m,the restraint function of the steel-tie-column is better.The wall thickness,The ultimate bearing capacity of the two kinds of constructional columns shows an upward trend as the thickness of the wall increases.The ultimate bearing capacity of the light constructional column is slightly lower than that of the concrete constructional column,and the restraining effect of the two constructional columns is basically maintained Consistent.(3)In order to further improve the seismic performance of steel-tie-column,this paper presents two design schemes of cross-section design and structural design of steel-tie-column.The finite element numerical analysis using ABAQUS shows that the two design schemes can effectively improve the light steel The conclusion is that the steel-tie-column with this design can replace the cast-in-situ reinforced concrete column and improve the seismic performance of infilled walls with frame structure.