Hello every one ,,
i am So confused about Robot analysing
i have do one way slab ,, and after analysing ,, i see the result ,, How the moment in short direction (direction of load transfer ) is smaller than the long direction !?
how is that happen ,, Can any one explain !?
thanks
Solved! Go to Solution.
Solved by Jade_Cereno. Go to Solution.
the reason seems to be because of the beams supporting your slab ... if it not rigid enough then it won't help the slab ... then your short span is your long span ...
its just simple model
4 slab connected in x direction
each slab , beam in x direction long 3m
, beam in y direction long 7 m
with support using Hing
loads , put any value
Mr.Rafal
thank you at first for repley ,
About the load direction ,, i make the transfer along the short direction ( x direction ) and i have checked the beams and found them reciving the load ( Here No Problems ) .
the problem is when i check the slab moment , i surprised when i have seen the moment in short direction is Too Small ( should be big ) and long direction is big
i dont find any explination !?
about your notes ,, How can i chang the Calculation type and whats diffrent from normal ??
I have More question about the program becouse i am working on Robot for my project graduated ,, If its possible i need your email
Thanks
Dear Sirs,
I have the same problem.... I chose Robot for the same aim....and now have many many questions...
Hello. Don't be confused with the moments given by Robot. When you say Myy. the moment turns on to the Y direction About X. while Mxx turns to X directions about Y.
I attached image for your use.
I was also confused the first time I used the Program.
@Ahmad.Shakmak wrote:Mr.Rafal
thank you at first for repley ,
About the load direction ,, i make the transfer along the short direction ( x direction ) and i have checked the beams and found them reciving the load ( Here No Problems ) .
the problem is when i check the slab moment , i surprised when i have seen the moment in short direction is Too Small ( should be big ) and long direction is big
i dont find any explination !?
about your notes ,, How can i chang the Calculation type and whats diffrent from normal ??
I have More question about the program becouse i am working on Robot for my project graduated ,, If its possible i need your email
Thanks
As higlighted in Bold, I think this will only happen if the Beams that you are transferring the loads are not deflecting. Which in reality it is deflecting. That's why you have a larger Moment on the Long Direction.
about your notes ,, How can i chang the Calculation type and whats diffrent from normal ??Geometry \ Properties \ Panel Caclulation Model
Hi Rafal,
I was answering the TS's question and quoted it that's why you saw it on my reply.
From what I see is that the Robot's out put is correct from here. I think using FEM softwares and making One Way Slab Analysis is not that applicable. Manual calculation, yes we can do that but on FEM's it will make one way slabs to two way slabs. unless we release the slab model on desired directions.
You may try this approach:
http://forums.autodesk.com/t5/Robot-Structural-Analysis/Force-Slabs-to-Span-One-Way/m-p/3515468 (message 4)
If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.
Thanks For helping ... but i have another question , whats the difference between the (detailed , principal , complex ) result ?? and whats ( 1,2,12,angle) in principal meaning !?
Formulas Determining Principal and Complex Values
If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.
Hi!
i don't know if it's late to answer but i think i know the answer (perhaps)... u prob need to change the local panel direction of the slabs.. make sure your panels local axis matches your normal local axis. means slab x-axis should be same as local window axis.. i'm certain after that u should get your answer. u big moment would represent in x-direction
cheers!