Investigation on the Energy Dissipation Properties of Jointed Structure during Macro-slip Stage

Abstract

Iwan Model is often deployed to describe energy dissipations and damping properties of jointed structures. The analytical expression of energy dissipation vs. applied force during macro-slip stage is derived based on the six-parameter Iwan model. Parameter identification method according to the macro-slip experiment of bolted joints is also provided in order to deduce the parameters of the model. A finite amount of Jenkins elements is obtained and further applied in numerical simulations. The results indicate a good agreement between the analytical results of the six-parameter Iwan model and the experimental data. A linear relationship of energy dissipation vs. applied force is obtained due to the residual stiffness acting on the contact interfaces during the macro-slip stage. The calculated results show a good conformity with the analytical ones during the macro-slip stage. It is shown that the six-parameter Iwan model can be used to well describe the energy dissipation properties of bolted joints during the macro-slip stage.