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External interdetermidiate

  1. Mar 19, 2017 #1
    1. The problem statement, all variables and given/known data
    In this example , the author said that we can choose either G or E as redundant and ignore the force when we are doing the analysis ...
    I was told by my lecturer that when we are choosing the redundant forces , it''s important that after removing the redundant force , the whole structure remain stable .

    2. Relevant equations


    3. The attempt at a solution
    Hoewever , I think that we can choose the force at E as redudant and remove it when we are doing the analysis. This is because by doing so , the whole structure would become unstable . So , I think we can only choose the support at G as redundant force
     

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  2. jcsd
  3. Mar 23, 2017 #2
    Why would removing E make it unstable? If you remove E, the pin at A would be 'pulled' upwards and the support at G would have a greater weight on it. That's not unstable at all.
     
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