The high-damping rubber isolator link property is available in ETABS, SAP2000 and CSiBridge. These isolators (bearings) provide coupled two-dimensional hysteretic damping in the shear degrees of freedom of the link, which is independent of axial force and rate of deformation. Axial behavior is linear elastic, as well as that of the torsional and bending degrees of freedom, if non-zero.
Parameters include control strains and strengths for one or more hysteresis loops, as well as a degradable elastic stiffness. These values can be determined from experiment or from the device manufacturer, such as Bridgestone or others.
Details of the implementation of the link property are provided in the Technical Note available within the CSI software products using the command Help > Documentation > Technical Notes > High-Damping Rubber Isolator Link Property, a copy of which is available here: S-TN-LNK-001.pdf.
The mathematical formulation was originally based on N. Masaki, T. Mori, N. Murota, K. Kasai, “Validation of Hysteresis Model of Deformation-History Integral Type for High Damping Rubber Bearings,” Paper 4583, Proceedings of the 16th World Conference on Earthquake Engineering, Santiago, Chile, 2017.
An updated version of this paper is available as K. Kasai, T. Mori, N. Masaki, N. Murota, “Simplified Modeling for Two-Directional Behavior of High Damping Rubber Isolation Bearings,” to be presented at the Eleventh U.S. National Conference on Earthquake Engineering, Los Angeles, California, 2018.
Links to additional resources will be provided here as they become available.
- Link FAQ – Link FAQ