1- This module is adopting STM model introduced through following ACI Paper:
Lee, H. J., Kuchma, D. A., Baker, W. F., & Novak, L. C. (2008). Design and analysis of heavily loaded reinforced
concrete link beams for Burj Dubai. ACI Structural Journal, 105(4).
https://doi.org/10.14359/19859
2- Beam theory, although does not seem applicable for deep beams, results in a more conservative design for this very case, therefore
user is encouraged to make comparisons with results from
Section 8 of the AS3600-2018
3- User may justify via calcs or testing that the nodes, and struts, are confined, to claim the maximum node stress of ϕ1.8 fc.
4- V = (M1+M2) / Span, user can't change this to maintain equilibrium. Use judgment to design for shear.
5- You might have the shear increased by overstrength factor, to make the beam fail on flexure first,
hence you could justify lesser flexural reo than in calcs here.
6- Struts must not overlap