Ram Structural System
Ram Structural System
(OP)
After strong recomendations, our firm finally bought bentley Ram structural System. I have used, staad, etabs, midas gen at various firms, and this is my first time with RAM SS, and i am surprised to learn RAM SS is incapable of assigning a two-way load distribution type floor deck to a simple multistory building model, modeled in RAM modeler. therefore load is not distributed to all four beam but is distributed through One-way, in direction selected when assigning the Deck to the floor slab. Is this correct? or am i missing something ? ?






RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
(just a question)
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
apparently Bentley dont have such document. Can you guide me a litle bit on how i can model two way loading using dummy beams
RE: Ram Structural System
I could not find the documentation RAM had sent me few years ago. But, you can look at the attached sketch which basically shows how to simulate 2 way action. In a typical bay, model the column strips as beams. Divide the typical bay in to 4 quadrants using 3 dummy beams. Full span dummy beam would be along the shorter of the two spans. Model the flat slab with deck oriented at 45 deg and 135 deg as shown in the attached.
RAM in their documentation had claimed that by doing this way the column loads & moments would be quite accurate.
Let me know how this works for you. I will keep looking for that document and will post it if & when I find it.
RE: Ram Structural System
thankyou so much this helped a lot, now i dont have to calculate loads manualy. However i distribute load on beams via Traingular method of distribution, but strip method is also fine i presume.
Thanks again
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
i have tried your way, it may be good for column design but surely is not good for beams. do you use RAM SS to design complete concrete structures ? columns beams and footing ? if so then how do to you model two load onto the beams
RE: Ram Structural System
We use RAM SS for complete concrete design when we have a wide joist module one way system. When we have 2-way slab system, we export the RAM SS model data to RAM CONCEPT and design it there. All columns and foundations are designed in RAM SS / RAM Foundation.
Just curious what kind of problem did you see with beam forces? What did you compare the RAM beam forces to? If properly modeled I would have expected comparable results.
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
RE: Ram Structural System
I called Bentley to ask about 2-way slabs and they said their solution was to use Concept and then import those results into Concrete. I did not go this route because I didn't have the time to learn Concept.
Instead, I modeled a concrete deck at 45 degrees so that each beam would be transferring the appropriate load to the columns. I used the axial loads from the results, as well as the story displacement and building story shear values.
I then modeled the continuous beams in Enercalc and used those designs.
I love RAM for many reasons but yes it does have it's limitations- they all do in some way. I just purchased RISA recently and have been disappointed with it thus far. I have used STAAD and I think it is the worst of them all... Of all the programs, I've been the happiest with RAM and if I had it to do over, I would have purchased RAM Advanse instead of RISA.
RE: Ram Structural System
Since you are not satisfied, see is RISA will refund your money.
RE: Ram Structural System