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RAM | STAAD | ADINA Wiki Ram Concept - Creating a Hinge in the Slab
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    Ram Concept - Creating a Hinge in the Slab

      Product(s): Ram Concept
      Version(s): V8i
      Environment:  N/A
      Area:  Modeling, Analysis
      Original Author: Bentley Technical Support Group

    How can I create a hinge in the slab?

    In Ram Concept the mesh of slabs and beams is always continuous material. You can elect to pin the columns and walls supporting the slab, but there is no automatic way to introduce a hinge in the slab or beams. 

    To simulate a hinge the user can introduce a weak zone at the point of the hinge. The weak zone could be

    • a region that is thinner
    • a sliver sized opening
    • a region with modified behavior 

    One advantage of using a thin slab strip is that you can visually identify this on plans and perspectives, but the resulting steps in the slab might complicate design strips trimming.

    The problem with openings is that vertical shear cannot traverse an opening.

    So it is generally preferred to use a slab with modified behavior. The figure below indicates how to model such a thing using KMs = 0.001:

    Note, the width of the modified region is not all that significant, but it should not be so small that it complicates the mesh.

    See Also

    Modeling Pour Strips in Ram Concept

    RAM Concept Structure FAQ

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    • Seth Guthrie Created by Bentley Colleague Seth Guthrie
    • When: Fri, Mar 13 2015 1:19 PM
    • Revisions: 1
    • Comments: 0
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