Seismic Isolation using Friction Pendulums

This e-learning course focused on using friction pendulums for modeling seismic isolation. You will learn how to choose the right friction pendulum element in OpenSees, choose and calibrate the friction model, compute an equivalent (effective) elastic spring for the modal analysis, and to run multiple NLTH analyses with different ground motions using the same model in STKO.
0:00 Welcome and Introduction to the topic of seismic isolation using friction pendulums
00:50 Introduction to STKO v2.0 and the NEW FREE license
4:10 Preview of what the python scripting interface can do: example of how to manipulate mesh (apply a Gaussian random field (GRF))
7:00 Opening the example model and explaining the parts (orientation, geometries, nodes for rigid diaphragm, selection sets, etc.)
12:36 Using the Friction Pendulum -creating the friction model (Coulomb 1)
25:10 Setting up the Eigenvalue analysis
27:58 Analyzing the base-isolated model
29:35 Running a Static gravity analysis
31:00 Apply damping
32:35 Setting the monitors and which to choose
36:44 How (and why) to set an Eigenvalue analysis after the timehistory analysis
43:00 Opening the analysis results, reading them, and viewing them in the postprocessor
46:40 Compute an equivalent (effective) elastic spring for the modal analysis
49:00 How to create an Isolator region (region command to contain all element tags for isolators)
56:25 How to compute the equivalent stiffness using a customer command: post-process isolator recorders
1:09:38 Final results
1:13:24 Q&A

[natalialioe]

Hi, may I ask for the reference for the reason using stiffness proportional for damping for base isolated building? Since it is not in download files in the STKO webinar page. Thank you very much.