Analyzing a Multi-storey multi-bay frame subjected to lateral load

  1. What is the best/easiest method I can use to get the deflections of a 5-storey, 3-bay frame subjected to lateral loads only? I've used the Elemental stiffness matrix for two-dimensional frame analysis (giving me a 60 x 60 matrix) but I'm getting the wrong deflection values. I think my procedure is erroneous because I've only referred to a single storey, single bay frame example in the book. Any help would be appreciated. Thanks.
  2. jcsd
  3. AlephZero

    AlephZero 7,248
    Science Advisor
    Homework Helper

    The method you used is OK, so you must have made a mistake somewhere.

    The "easiest" way is use a finite element analysis computer program instead of setting setting up the stiffness matrix yourself - but if the objective is to learn how the FE method works, not to design a building, then you do need to work through the details yourself.
  4. nvn

    nvn 2,124
    Science Advisor
    Homework Helper

    median27: I am not sure what the "Elemental stiffness matrix for two-dimensional frame analysis" method is, unless it is just the finite element method. The best and easiest method is the finite element method. Are all of your connections moment connections? Are all of your applied loads nodal applied loads, not uniformly-distributed loads? Do you have a finite element analysis software program? Is this a school assignment, or test question?
    Last edited: Jan 5, 2014
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