Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations SDETERS on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

SAP2000 friction isolator boundary

Status
Not open for further replies.

ATSE

Structural
May 14, 2009
594
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.

Friction_Isolator_Screenshot_2022-03-18_jjpxdr.png
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor