The Finite Analysis Of Bearing Performance Of Centrifugal Concrete-filled Steel Tube

Centrifugal concrete-filled steel tube is a special kind of composite structure which is made of tube thin-wall steel tube with a centrifugal concrete tube inside. Because of its advantages, such as good plasticity and elasticity, good rigidity, assembly in factory and lighted weighted, it has been widely used in engineering fields.This thesis compiles the finite procedure separately with bi-fiber mode which can describe the Centrifugal Concrete—filled—wall Steel Tube behave perfectly in axial compressive loading, axial tensile loading, eccentric compressive loading and eccentric tensile loading after considering material and geometric nonlinearity. At the same time, this thesis also gives a analytic solution of Centrifugal Concrete—filled— wall Steel Tube in axial compressive loading, axial tensile loading and bending loading and describes the effect of the Centrifugal Concrete—filled—wall Steel Tube behave in axial compressive loading, axial tensile loading, eccentric compressive loading and eccentric tensile loading as to steel ratio, hollow ratio, slenderness ratio by use of finite analysis.At last, the thesis revises the design formulas which are from the code of Centrifugal Concrete-filled Thin-wall Steel Tube structure in axial compressive loading, axial tensile loading and bending loading through comparing the result of analytic calculation with the result of finite calculation and gives the bending and compression design and bending and tension design formulas according to simulation result of finite analysis.