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Gradient at roller and pin support

  1. Jul 31, 2016 #1
    1. The problem statement, all variables and given/known data
    in the notes , why did the author only stated that zero displacement occur at pin and roller support?
    Why the author didnt stated that the slope at pin and roller support is also = 0 ?

    2. Relevant equations


    3. The attempt at a solution
    As we can see from the figure, the gradient at pin and roller support = 0 ?
     

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  3. Jul 31, 2016 #2

    David Lewis

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    Gold Member

    The slope is maximum at the ends of the beam, where the pin and roller are located, not zero.
     
  4. Jul 31, 2016 #3
    why not = 0?
     
  5. Aug 1, 2016 #4
    the slope is minimum in the middle of the beam, and 0 at the 2ends of beam, right?
     
  6. Aug 1, 2016 #5

    David Lewis

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    Gold Member

    The beam is sagging. Slope is zero only at the center of the beam. But at either end, slope is maximum.
     
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