Creep effect analysis of concrete-filled steel tubular structure on construction

Mathematical functions of creep coefficients are selected from code for design of reinforced concrete and pre-stressed concrete highway bridges and culverts in China. A program is obtained through the secondary development of ANSYS according to the age-adjusted effective modulus method. The correctness of this program is proved by a sample. According to the construction process, creep effect analysis of concrete-filled steel tubular structure is done. The elastic analysis is also done in order to compare with creep effect analysis. It is indicated that the effect of concrete creep is notable to the mechanics capability of concrete-filled steel tubular structure on construction. So the concrete creep should be considered in the analysis of construction mechanics to important concrete-filled steel tubular structure.