Analysis On Joints And Seismic Performance Of Concrete-Filled Square Steel Tubular Columns

The concrete-filled square steel tubular column system is the newly emerging high steel structure residential system,the scholar has little research on the concrete-filled square steel tube column and its damping performance.Therefore,this paper used the finite element software ABAQUS and SAP2000 to analyze the finite element method and the seismic performance of the concrete-filled steel tubular column frame system.The main contents are as follows:(1)By using the finite element software ABAQUS to establish the finite element analysis model of box-shaped sections large-sized columns,T-pillars columns,ten-pillar columns,I-shaped columns.Taken the low cyclic loading on the top of columns,ivestigated the diffierent joint the mechanical properties and failure modes.The results show that the combined performance of the box joint is better than that of the joint.(2)After the analysis of the stud ABAQUS preferred form of connection nodes region,the article adopt the structure of the concrete-filled steel tube(CFST)composite column frame system.Then by useing the SAP2000 to set the ordinary chevron support,anti-buckling support V-shaped and viscous dampers with two forms of connection and five structural model.Compared the analysis of the data analysis process parameters with five models.The result shows that viscous dampers damping effect steel-concrete composite columns is significantly better than BRB and general support structure and connected to form chevron viscous damper strut better than single forms of energy optimal effect.(3)In this paper,the horizontal and vertical arrangement scheme of the human-shaped viscous viscous damper is set up in the concrete-filled square steel tubular composite column structure system,and the shock absorption performance and economic benefit are compared and analyzed under the rare earthquake.The results show that the damper arranged in the structure of the 5 and 23 axis of the shock absorption effect is better than the structure of the external 1 and 27 axis arrangement.In the structure of the damper each layer of the best damping effect,followed by the structure of the layout of 1-8(Lower half),the third is the layout of the layout,the worst one is 9-15(Lower half)layer layout effect.Taken together,the arrangement of the damper in the lower part of the structure more economical and good damping effect.