The Study On Static Behavior And Seismic Behavior Of Hollow T-Shaped Steel Reinforced Concrete Columns

Steel reinforced concrete structures are often divided into two types: solid web and open web.For solid web steel reinforced concrete columns,both theoretical and experimental aspects have been widely studied,but there is still a lack of research on the seismic and static performance of open web steel reinforced concrete.Because the special-shaped column will have a better application prospect in the future,so the content of this paper is the static and seismic performance of T-shaped steel reinforced concrete column.The main contents of this paper are as follows.(1)Firstly,the advantages of steel reinforced concrete special-shaped columns are analyzed,and then the characteristics and research status of solid web steel reinforced concrete and open web steel reinforced concrete are described.After understanding its characteristics,the concept of hollow T-shaped steel reinforced concrete special-shaped column studied in this paper is put forward.According to the specifications and literature,the reasonable model is designed,and then the loading mode in line with the actual engineering is set.ABAQUS is used to simulate the performance of the specimen under static and seismic action.(2)In this paper,the static performance of hollow T-shaped steel reinforced concrete special-shaped columns is divided into two aspects,namely,the static performance under axial compression and eccentric compression.Firstly,the load displacement curve and the stressstrain nephogram are extracted by changing the concrete strength grade,the bone content,the steel strength grade and the slenderness ratio.Then,by changing the eccentricity,slenderness ratio and bone content of the specimen,the load displacement curve,load deflection curve and stress-strain nephogram are extracted respectively to analyze and compare the eccentric compression performance of the specimen.(3)In the aspect of seismic performance research,the influences of slenderness ratio,concrete strength grade,bone content,steel strength grade,loading angle and axial compression ratio on the seismic performance of T-shaped steel reinforced concrete hollow columns are analyzed.The hysteretic curve,skeleton curve,stiffness degradation curve and ductility coefficient of the specimen under low cycle reciprocating load are analyzed comprehensively.Finally,the results show that both the static performance and seismic performance can see the advantages of the Vierendeel T-shaped steel reinforced concrete special-shaped column structure.In the last stage of this paper,it makes a detailed summary and puts forward the problems that need to be further studied.