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Jennifer Schuler

November 16, 2019 22:49

 

Hi, this is from an old NCARB structures practice exam. I know the answer is 2.5 however can't remember why.. any insights would be appreciated. 

Thanks!

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  Wendy Dyba November 24, 2019 00:58

  would it be w/2?

  w=1+2+2=5

  5/2=2.5k

  ?

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  Susan Arnold March 07, 2020 14:55

  I know this thread is a few months old, but I'm wondering the same thing. The question is from the NCARB 4.0 Structural Systems exam guide.

  In Ballast I can't find an example problem quite like this but in one Ballast example of wind loading, the total wind load on the building is added together and then divided by the number of walls (2, in Ballast's case). So I would potentially expect the total shear, 5K, as Wendy said, to be divided by 3 (columns). But that's not the given answer. (5/3 does not equal 2.5) Anyone else have insights on this? This also ignores the given dimensions but I think we can do that for shear...

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  Kenneth Vitale March 09, 2020 15:59

  This was not a good question unless you study structures. This is an indeterminate structure and not a simple analysis to solve it.. The following web page gives you your answer.

  https://theconstructor.org/structural-engg/analysis-methods-frames/1701/

   

  

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  Susan Arnold March 09, 2020 20:54 (Edited March 09, 2020 20:58)

  Thanks Kenneth for taking the time to help me out! The solution you provided appears to result in the correct answer.

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