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Homework Help: [Structural Mechanics] Conceptual Questions - Mechanisms & Plastic Analysis

  1. Apr 10, 2012 #1
    1. The problem statement, all variables and given/known data

    Determine the failure mechanism and plastic moment for the following structure, using either the upper bound or lower bound theorem for plastic analysis.

    Picture

    (There is a physical hinge in the middle of the structure)

    2. Relevant equations

    Internal Work = External Work

    Euler-Bernoulli Beam Theory

    3. The attempt at a solution

    The structure is a mechanism from the word go. My question is the conceptual question; namely, why?

    Solving the structure via equilibrium confirms the problem, but its the concept that I can not grasp.

    Any help would be appreciated.
     
  2. jcsd
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