Abstract: In two formulas (E.0.3-1 and E.03-2) in the "Specifications of Concrete Structure Design, GB50010-2010) for the design of the flexural members with annular section, the ratios of the compression zone and the all section area   are complicated. The authors converted these two values into tables so that the trial and error process of solving the transcendental equations can be avoided. This paper also gives out an example to show the suggested method has the advantages of fast, simple and practical.

Key words: Reinforced Concrete, Supporting Pile, Section Design