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SAP2000 friction isolator boundary

SAP2000 friction isolator boundary

SAP2000 friction isolator boundary

(OP)
Looks for guidance on using a nonlinear friction element to model foundation - soil interface, for the condition of very high horizontal acceleration time history ground motions; I know the superstructure will move relative to the subsurface, and there will be permanent horizontal displacement.
Friction at interface = 0.5, and spectra accel > 1.5g (T=0.1s), and PGA > 1.5.

My interest is peak structure acceleration, and permanent horiz displacement. Ground motion is scaled El Centro and simple sinusoidal at 2 Hz.

1. Does CSI (or anyone else) have an example problem for this? One-dimensional shaking.

2. SAP2000 provides many options for joint boundary conditions. Is the "Friction Isolator" Link/Support type the best selection? If so, for a very simple 2D problem, what fields do I populate.

Not much guidance from CSI, and previous posts here at eng-tips have gone mostly unanswered.




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