| When Concrete-filled double-skin Circular steel tubes are used in practical engineering,such as brace nodes between columns, frame nodes between special-shaped columns and steelreinforced conctete beam, and beam-column joints of large-span overloading beams, the shearproblem is obvious. In this paper, a combination of experimental and theoretical methods isused to study Mechanical properties of concrete-filled double-skin Circular steel tubessubjected to complicated loading states of press, bending and shear, finite element method isused to study Mechanical properties of concrete-filled double-skin Circular steel tubes subjectto pure shear. Details are as follows:(1) Domestic and foreign research results were analyzed and summarized, so thatExperimental method and theoretical analysis method of concrete-filled double-skin Circularsteel tubes subject to complicated loading states of press, bending and shear are identified;(2) Six concrete-filled double-skin Circular steel tubes and1concrete-filled steel tubesare designed, the mechanical properties of specimens subject to complicated loading states ofpress, bending and shear are studied by the experiment, and a detailed analysis of theexperimental phenomena and results are conducted;(3) Finite element software ABAQUS is used to calculated the performance ofconcrete-filled double-skin Circular steel tubes subject to pure shear state, simplified formulato calculate Shear strength of concrete-filled double-skin Circular steel tubes is suggested;(4) On the basis of that the simulation calculation results are in good agreement with thetest results, finite element software ABAQUS is used to calculated the performance ofconcrete-filled double-skin Circular steel tubes subject to complicated loading states of press,bending and shear, the mechanical properties of it is Analysised. |
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