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Wednesday, May 23, 2018

Structville Question of the Day

Structville daily questions
From now henceforth, Structville will be publishing daily questions on different aspects of civil engineering. You are expected to enter your response in the comment section. At the end of every week, exceptional participants will stand a chance to win some gifts. This exercise is open to participants all over the world.

Today's Question
For the two beams loaded as shown above, which formular is common to each of them when evaluating the internal forces in the final loaded state? (assume linear elastic response)

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  1. For simply support beam moment at mid span, M = wl^2/8
    For fixed span beam moment at support M = wl^2/12 and at mid span M = wl^2/24

  2. D) WL/2 (reaction at the support)

  3. a) wl^2/8
    For Simply supported beam, moment @ mid-span = wl^2/8
    For beam with Fixed supports, moment @ mid-span = wl^2/24 i.e 1/3*(wl^2/8) and fixed end moment = wl^2/12

    Conclusion, the formular they have in common is wl^2/8.


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