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PostPosted: Wed Jan 18, 2017 1:59 am 
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Joined: Wed Jan 18, 2017 1:44 am
Posts: 1
Hi all,

I am simulating a bridge on lead-rubber bearings for a 3D nonlinear analysis.

The bearings are easy to simulate when the earthquake acts only in one direction through a first set of springs with a yielding force, and a second set of springs with a gap to provide post-yielding stiffness.

However, I would like to simulate the bearings for a 3D case, where the earthquake acts in orthogonal directions, and the yielding force of the bearing is to be compared with the vectorial sum of forces in the 2 orthogonal directions, instead of the comparing the yielding force with the force in each direction independently.

Said differently, I would like to simulate a yielding spring which remains elastic as long as:
F_spring < (Fx^2+Fy^2)^0.5

Thanks.


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