The Study Of Circular Stainless Steel Tubes Filled With Sea Sand Concrete Under Eccentric Tension

Sea Sand Concrete Filled Stainless Steel Tubular columns combine the advantages of both stainless steel and sea sand,this new composite structures not only help solve the shortage of river sand resources and the problems of structural durability of concrete filled carbon steel tubular,but also inherit the merits of CFST such as high bearing capacity,good seismic performance and so on.At present,the study of mechanical properties of concrete filled stainless steel tubular under eccentric have not reference.However,sea sand concrete stainless steel tube columns have a broad prospect of development and application in future.So the study of sea sand concrete stainless steel tube columns has important engineering significance.In this paper,we put the theory and the experiment two parts together.Resear-ched on the mechanical properties of circle stainless steel tube filled with sea sand concrete under axial as well as eccentric tension,working mechanism and parameter analysis were also finished.the main achievements can be summarized as follows:(1)Made a simple review on the current situation of theory research and experimental about(sea sand)concrete filled(stainless)steel tube at home and abroad.(2)4 stainless steel hollow steel tube specimens and 30 concrete filled stainless steel tube specimens were test,sectional steel ratio,eccentricity ratio,concrete type were concerned on the influence law of specimen tensile strength;Include the influence of the load(N)-displacement(?)curve,bending moment(M)-strain(?)curve,load(N)-strain(e)curve of(sea sand)concrete filled(stainless)steel tube members.The test results were compared with GB50936-2014?DBJ/T13-51-2010?EC4-2005 and AISC-2010 formulas to see whether the bearing capacity of concrete-filled steel tube members is similar to that of stainless steel tube members.(3)This paper developed nonlinear finite element analysis(FEA)model of concrete-filled steel tubular(CFST)columns under eccentric tension loading,where the material properties of steel and concrete were taken into consideration.The result showed that the finite element results were verified against with the previous test results.(4)Use the finite element model which is validated by the experimental results to analyzed the mechanism of the typical components.And a few typical parameters were selected for parameter analysis...