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Homework Help: Slope deflections method analysis of beam

  1. Jan 13, 2017 #1
    1. The problem statement, all variables and given/known data
    why we need to consider 2 conditions , the beam curve downwards ( as in 11-3) and beam curve upwards ( as in 11-4) ?
    What's the difference between 2 cases ?

    I notice that in both cases , the author assume clockwise as positive
    here are the 3 consecutive pages of notes
    2. Relevant equations

    3. The attempt at a solution
    I think the second cases where the curve curve upwards is unnecessary because we can see that the curve curve downwards (U shape) in the first photos .

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  2. jcsd
  3. Jan 13, 2017 #2
    why for the relative linear dispalcement , we just have to consider one scenario only , namely consider the case where the member B is displaced relative to A ? Why we dont have to consider the case where the member A is displaced relative to B ?
  4. Jan 13, 2017 #3
    Is there anything wrong with these cases ?
  5. Jan 14, 2017 #4
    Can someone explain it ?
    Or we need to consider 2 cases ( where the curve curve upwards and curve downwards) because it is a must to do so ? The beam will curve like this one if we superimpose 2 graph ? The red part represent the shape of graph , while the black line represent the beam

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  6. Jan 22, 2017 #5
  7. Jan 25, 2017 #6
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