Abstract
In the previous paper (Part 1), ultimate limit index points of partially prestressed concrete (PPC) beams are proposed, which relate to ultimate failure of concrete in flexural compression zones, fracture of tensile reinforcement and buckling of compressive reinforcement. Usefulness of the points are shown in evaluating the deformation capacity taking into account for falling behavior of moment-curvature relations of concrete flexural members. This paper describes on derivation of equations to calculate extreme fiber strains, flexural resistance moments and curvatures at the proposed ultimate limit index points of sections of concrete flexural members from prestressed concrete section to reinforced concrete one. The transition of ultimate failure modes and equations to calculate those limit index points of PPC flexural sections with the change of amount of reinforcement index is investigated, and wideness of applicable range and simpleness of the derived equations to calculate the points of ordinary PPC flexural sections are shown.
