Hi Everyone,
I was hoping I could get your insides on highly talked about topic here – Downstand (‘T’) beams.
I have seen many post regarding modelling the beams using FE shell as slab and bar element for beam. I agree with the approach where Iyy of the beam is increased by the Iyy ration of rectangular to t-beam. There is a good amount of information on the forum regarding the modelling and analysis but I was unable to find anything on how to read the results.
My guest ion is on reading the results from the model:
Say I want to design the beam in my spreadsheet and just need the Bending Moment from my Robot model. In addition to extracting moments form the bar element (say, mid span moment from a simply supported condition) should the map moment form the FE shell representing slab be manually added to get the correct moment. Should this be taken as a panel cut taken across the with of the bar element?
I have included example below (middle beam):
Load case: 15kPa
Iyy increased by factor of 2 (as example only)
Pinned support conditions.
Moment in Bar element = 205.23 kNm
Moment in shell cut (over 300mm = width of the bar element) = 22.65 kNm