Abstract:
This paper focuses on the creep analysis of eccentrically-compressed concrete filled steel tubular members. The creep theory of concrete under multi-axial stresses and the elastic continuation and plastic flow theory of concrete creep are adopted in the analysis. By determination of the initial conditions and construction of a creep model for the members, a method is developed. The influence of steel ratio, eccentric ratio and confined stress on the creep of eccentrically compressed concrete filled steel tubes is studied. Iterative process is introduced into the model to simulate the time-dependent property of concrete creep.