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Cyclic plastic moment in a PMM hinge will lead to rachetting behavior (ie. accumulation of plastic deformation) in the axial direction, and this is expected by plasticity theory.

h1. See also

* Test problem [tp:Hinge response when yield point changes], load cases 4a, 4b and 4c

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Related incidents:

* {incident:no=18341|comment=Ratcheting for PMM hinges explained by bm.}
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