Shear Wall analysis in RAM Frame

Hi,

I have a steel-framed building using shear walls for the lateral system. I need a little help analyzing the results that RAM Frame is coming up with. How can I validate the results that RAM Frame is coming up with?

I made all of the diaphragms semirigid and attached a beam from each wall to a beam or column on each level so the walls would be attached to the diaphragms, is this accurate to do?

When I run my lateral load cases and look at the member forces, the dead and live load cases are coming up with shear forces in the walls, why is this happening?

Each diaphragm level for the entire building is resulting in a shear force in the walls. Is there a way to make it so it gives shear forces at the diaphragm level where there is actually a diaphragm? 

Is there a way I can have the software design wall reinforcing? These are masonry walls.

I will upload a secure file. 

Thank you. 

Parents
  • Julie,

    You have modeled the walls with the short beams connecting them to the adjacent steel framing correctly.

    Applied loads that are not symmetry to the wall will cause the wall to overturn. When a diaphragm restrains that tendency to overturn, shear forces will be induced in the wall. The total sum of all shear forces in the walls will sum to 0. You can verify this with the Building Story Shear Report.

    I do not understand the 3rd question on diaphragms and shear force. The Building Story Shear reports total shear by diaphragm if that is the output that you need.

    RAM Structural System designs lateral, concrete walls only. You will not be able to design masonry walls. However, RAM Elements can design masonry walls and there is a direct import option in RAM Elements to open RAM Structural System. See this web page for more on the RAM Elements-RAM Structural System integration if you are interested.



Reply
  • Julie,

    You have modeled the walls with the short beams connecting them to the adjacent steel framing correctly.

    Applied loads that are not symmetry to the wall will cause the wall to overturn. When a diaphragm restrains that tendency to overturn, shear forces will be induced in the wall. The total sum of all shear forces in the walls will sum to 0. You can verify this with the Building Story Shear Report.

    I do not understand the 3rd question on diaphragms and shear force. The Building Story Shear reports total shear by diaphragm if that is the output that you need.

    RAM Structural System designs lateral, concrete walls only. You will not be able to design masonry walls. However, RAM Elements can design masonry walls and there is a direct import option in RAM Elements to open RAM Structural System. See this web page for more on the RAM Elements-RAM Structural System integration if you are interested.



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