We have a situation where an existing building utilizes platform-framed construction and several columns have beams with 10'-0" cantilevers which run over top of them. We do not feel it's conservative to assume a perfect fulcrum (i.e. zero eccentricity) if only due to erection tolerances. Is there some workaround we can use to induce eccentricity in these columns?
Using the manual override doesn't work as RAM SS still assumes zero eccentricity (and hence zero bending moment) and using a stub cantilever beam (as opposed to a cantilever extension) induces ALL of the moment in the column. We'd like Ram to recognize the user input eccentricity, is there any way to make that happen?
Thanks!
Landon
You can make the beams and columns lateral and then assign the desired fixity and establish the column unbalanced moment based on the RAM Frame finite element analysis.
Otherwise I guess you could run a variation of the model without the cantilevers.
For those out there who did not realize we use zero eccentricity on columns supporting beams with cantilevers, here's a bit more info:
communities.bentley.com/.../2055.ramss-columns-faq.aspx
I'll remind the product manager that some eccentricity in those connections is desirable.