Response of Multi-Degree-of-Freedom Yielding Systems

by Wilfred D. Iwan,

Serial Information: Journal of the Engineering Mechanics Division, 1968, Vol. 94, Issue 2, Pg. 421-438

Document Type: Journal Paper


The steady-state frequency response equations for a class of multi-degree-of-freedom yielding structures are determined using approximate analytic techniques. The yield model used is a distributed element model which gives rise to a family of curved hysteresis loops. As an example of the general formulation, a three-degree-of-freedom system is considered and characteristics such as peak response amplitude, resonant frequency shift, and effective damping are analyzed.

Subject Headings: Degrees of freedom | Steady states | Structural analysis | Curvature | Hysteresis | Resonance | Damping

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