In order to develop the relationship between the moment and
curvature of a section, the concrete slab, top flange, web, and
bottom flange were discretized into ten strips each with equal
thickness. The CFRP sheet was considered as one layer. The
strain at top of the concrete slab was the primary parameter that
varied at each step and the depth of the neutral axis was calcu-
lated by trial and error. A pair of values for moment and curvature
was obtained at each point.