Deflections of concrete structures are commonly investigated under service loads. For calculating the position of the neutral axis non-linear equations must be solved. There is not an accepted general method, because the functions, which have been used, are sophisticated and their convergence features are not known. This article presents a method for calculating the position of the neutral axis by a direct recursion. This method can be the generalization of the so-called Pelikán iteration, which can be used for symmetrical bending. In the simplest case (rectangle section) we proved, that the new method always converges, it behaves better, than the original Pelikán iteration. In more sophisticated situations we experienced the same global convergence numerically.
#EET #RC #Pelikanmethod #neutralaxis