Abstract
To investigate the applicability of flexibility method that is based on strict force distribution to concrete structures, analyses of RC elements under various cyclic loading were carried out and numerical simulations of concrete structures which reach large deformation states were performed by the method. As results of these analyses, it was shown that flexibility method can estimate the accurate moment and curvature distribution by just one element so long as force distribution is linear, which is an usual case in real elements, and that it is possible to estimate the post-peak behavior by consistent algorithm. Further, it was shown that flexibility method is applicable for both static and dynamic analyses.