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How to implement hinge boundary condition in Opensees

CorporalToe

Civil/Environmental
Mar 9, 2024
45
I am trying to simulate a frame where the beams are connected to the columns via hinges. I have it working as rigid connection but I do not know how to add releases for the moments.
 
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You could make 2 nodes at the same point, and define a zero-length element with stiff x and y properties and no rotational stiffness. I did something similar for a project with RBS connections, instead of 0 rotational stiffness, the rotational stiffness was based on the hysteretic behaviour of the RBS hinge.

I'm sure there are other ways to do it but that's what came to me.
 

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