I am working on a hinged r/c concrete frame, where I need to subdivide some of the beams in order to connect them to columns via diagonals.
After subdivided the beams (and prior to add the diagonals) I ran an D-T-H analysis and although there was not a convergence issue I noticed that the moment diagrams of these beams were not as expected (see in the picture below the left beams' diagram contrary to the similar un-subdivided beams). Beams are hinged (M2) only at their connections with columns and not at the middle of span. Have you any idea of why does this happen?
