This
paper presents a
procedure that allows computing the axial load-bending moment
(N-M)
interaction curves
in case of rectangular R/C columns confined by FRP. At
this purpose the constitutive law for the FRP confined concrete in compression
adopted by the recently edited guidelines of the Italian National Research
Council (CNR, 2005) has been used. This law presents two different branches;
the first one parabolic and the second one linear and degenerates in the
well-known “parabola-rectangle diagram” (CEN, 2001) when the confinement is
absent. The obtained
interaction curves are presented in a dimensionless
representation (ν.µ), which is useful in strengthening interventions design, since it
allows representing in a very simple way the dependence on several parameters.