moment-rotation curve

[montoya]

Hello everybody, I am trying to run a sectional analysis using the RCsection.tcl script, with steel01 concrete01 (cover) and concrete02 (core) ,with a relatively high axial load (compression), the recorder for moment-rotation shows and infinitely linear increasing capacity after yielding of the steel. Have not figured out the problem yet, which does not occur if there is no axial load and the moment-rotation curve seems correct.

[silvia]

look at your concrete strains at steel yielding.