Abstract
In order to design and construct new type hybrid structures, more general time-dependent-analysis is needed. Then we propose an exact method for time-dependent-anlysis in this paper, in which the changing of centroid axis due to construction sequence in cross section and time-dependent behaviors such as creep and shrinkage of concrete. And it adopts the step-by-step method and the successively integral method, which is not influenced by a form of predicting formula in creep of concrete. Furthermore it assumes the parabolic strain distribution in the members for calculating the end-forces such as creep and shrinkage of concrete, and relaxation of prestressing steel. At last due to the numerical examples, the restraint effect of steel in concrete and the influence degree of changing of centroid axis are presented.
