Research On Tensile Bearing Capacity And Beams-Columns Hysteretic Behaviour Of Concrete-Filled Stainless Steel Tubes

This paper performs the experimental and theoretical studies on behaviour、mechanisms、parametric analysis of concrete-filled stainless steel tube（CFSST） axial tension, pure bending,hysteretic, beam-columns. The main works can be summarized as follows:1. The progresses and achievements of experimental and theoretical research on CFSST andrecycled aggregate concrete-filled steel tube (RACFST) at home and abroad are reviewed. Thelimits on the current research are pointed out. The objectives of the present work and contentsare described.2. Experimental studies on the axial tension behaviours of two hollow stainless steel tube（HSST）specimens and eight CFSST specimens under axial tension loads, are carried out. Themain parameters included:sectional types, concrete strength，whether greased on the interface.The influences of those parameters on the performances of the tested specimens bearing capacityof the axial tension, were investigated. The mechanisms of load-deformation relationships andparametric analysis of CFSST and concrete-filled steel tube (CFST) under axial tension loadswere systemically analyzed in software ABAQUS. Based on the results of parametric analysis,the simplified calculating formulas for bearing capacity of CTSST specimens under axial tensionloads were discussed.3. Experimental studies on the pure bending behaviours of two CFSST beams and tworecycled aggregate concrete-filled stainless steel tube (RACFSST) beams, are carried out. Themechanisms of load-deformation relationships and parametric analysis of CFSST beams andCFST beams were systemically analyzed in software ABAQUS. Based on the results ofparametric analysis, the simplified calculating formulas for bearing capacity of CFSST beamswere discussed.4. Experimental studies on the hysteretic behaviours of six CFSST and four RACFSSTunder cyclic loads, are carried out. The mechanisms of load-deformation relationships andparametric analysis of CFSST beam-columns and CFST beam-columns were systemicallyanalyzed in software ABAQUS. Based on the results of parametric analysis, the simplifiedcalculating formulas for bearing capacity of CFSST beam-columns were discussed.