I need a software that can do what spColumn (formerly PCAcolumn) can do but using AASHTO Standards, specifically,checking a column and producing an interaction diagram based on a "phi" factor that varies with the level of axial stress per Div IA 7.6.2(B). A software in which a varying equation...
Can anyone give an example that shows how to calculate axial and shear force corresponding to plastic hinging of columns as well as the column plastic moment according to AASHTO 17th Edition LFD?
Is Simple Span Moment and Shear Envelopes for HS Loading the topic where you found the mathcad sheet? It looks you need to buy it from PTC, is that so?