An Iwan Model for Dissipation in Structural Systems With Frictional Joints

Abstract

Modeling mechanical joints in an accurate and efficient manner is of great importance in the analysis of large structural systems, which can be composed of a large number of connected components. This work presents an interface model that can be decomposed into a series-series Iwan model together with an elastic chain, subject to interfacial shear loads. The model is developed and results are presented as the interface is subject to harmonic loading of varying amplitude. The model presented is able to qualitatively reproduce experimentally observed dissipation scalings. Finally, the interface model is embedded within a larger structural system to illustrate its effectiveness in capturing the structural damping induced by mechanical joints.