Abstract：Research purposes: As a main load—bearing component，concrete filled steel column has been widely used in large—sized buildings and bridge structures．The research on the bearing capacity of concrete filled steel column，especially under the temperature load is on the basis of the experiment．In this paper，the Airy stress functions introduced in inverse method of elastic theory are used to obtain the stress status of steel column and concrete， interaction force between steel column and concrete under the joints effects of axial pressure and temperature on the concrete filled steel column and obtain the analytic formulas for the internal temperature．
Research conclusions: Under the joints effects of axial pressure and temperature，the temperature，radial stress and normal stress in the same plain face of concrete filled steel column are of the curve function of the radius，and the polynomials of temperature is only affected by the thermal conductivity coefficient．The radial stress and normal stress are Not simply affected by the stiffness of steel and concrete，but both with the stiffness thermal conductivity coefficient．
[2] Ahmed Elremaily，Atorod Azizinamini． Behavior and Strength of Circular concrete—Filled Tube columns[J]． Journal of Constructional Steel Research，2002(1 2)：1 567— 1591．
[3]J．B．Mander，M．J．N．Priestley，R．Park．．Theoretical Stress—Strain Model for Confined Concrete[J]．Journal of Structural Engineering，1988(3)：1804—1826．
2009, Vol. 26 
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