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Homework Help: Shear stiffness for elevated water tank

  1. May 7, 2013 #1
    Hello,

    I just have simple question regarding shear stiffness for elevated water tank,
    this tank is elevated on a column and this column is fix in the base
    my question is which formula should i use to calculate k
    k=3EI/L3 OR 12EI/L3
    i know the the first for fix pin case and the second one is for fix fix case

    the solution for the example as far as i see , is consider 3EI/L3

    but i am trying to compare this to one floor rigid slab example in which the solution is 12 EI/L3

    So why the tank is different, could nay one guide me through this
     
  2. jcsd
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