topic Re: Load distribution areas on slabs-diaphragm in Robot Structural Analysis Forum

Load distribution areas on slabs-diaphragm

Anonymous — Fri, 02 Jun 2017 15:26:16 GMT

Hallo...i want your opinion about an issue... In the following picture you can see load distribution areas from slab-diaphragm to beams...but according to the theory the load distribution from a slab depends on the connexion with the other slabs...the angle is different in any case of connexion (pinned-fixed, fixed-fixed) as you can see in the picture...Robot takes the angle 45 degrees for every case...for exaple according to the theory there are 3 kinds of angle 45 (fixed-fixed), 60 and 30...

What do you think? thanks a lot...

Re: Load distribution areas on slabs-diaphragm

Rafacascudo — Fri, 02 Jun 2017 17:46:18 GMT

It will not work as in your picture.

if you want a more realistic load distribution you can mesh the diaphragm and set the load transfer to analytical

Re: Load distribution areas on slabs-diaphragm

Anonymous — Mon, 05 Jun 2017 20:23:49 GMT

@Rafacascudo thank you for the reply, and i would like to ask something more...i am trying to model a wall 2,00x0,30 meters as column...i define the section and then i link the beams nodes with the column node with a section (beam section) with more moment of inertia (all beams has 0,5 iy and iz any o,1 ix but this beam has iy=iz=1 and ix=0,1) to simulate the wall stiffness...my results are not very acceptable...i tried to link the column node and beams nodes as rigit link but the program understood the beam node as o cantilever... do you have any idea about this issue;;;; how i can model a wall as columns;;; thanks

Re: Load distribution areas on slabs-diaphragm

Rafacascudo — Mon, 05 Jun 2017 23:00:20 GMT

Can you send a sketch , the model?

Re: Load distribution areas on slabs-diaphragm

Anonymous — Tue, 06 Jun 2017 10:40:26 GMT

yes of course

Re: Load distribution areas on slabs-diaphragm

Rafacascudo — Tue, 06 Jun 2017 11:42:52 GMT

It should work linking the columm node with rigid links to the beams nodes at the edge of the columm.
Can you send the model?

Re: Load distribution areas on slabs-diaphragm

Anonymous — Tue, 06 Jun 2017 11:56:41 GMT

ofcourse i will send the model if you want...but this is the moment in case of rigit links and without link beams...the programm analyze the beam as a cantilever i suppose...

Re: Load distribution areas on slabs-diaphragm

Rafacascudo — Tue, 06 Jun 2017 12:00:36 GMT

What kind of rigid link did you use? Did you block all 6 directions?
It seems your rotations are released!

Re: Load distribution areas on slabs-diaphragm

Anonymous — Tue, 06 Jun 2017 12:18:45 GMT

i will check it...