Estimating Earthquake Response of Simple Hysteretic Structures

by Wilfred D. Iwan, Prof. of Applied Mechanics; California Inst. of Tech., Pasadena, Calif.,
Nathan C. Gates, Project Engr.; Gulf Research and Development Co., Houston, Tex.,

Serial Information: Journal of the Engineering Mechanics Division, 1979, Vol. 105, Issue 3, Pg. 391-405

Document Type: Journal Paper

Abstract: This paper examines various methods for defining effective linear systems for the earthquake response analysis of simple hysteretic structures. A broad class of approximate methods is considered including: harmonic equivalent linearization, resonant amplitude matching, dynamic mass, constant critical damping, geometric stiffness, geometric energy, stationary random equivalent linearization, and average period and damping. A technique for estimating the accuracy of different approximate methods is presented. A new linearization scheme that may be applied to both degrading and nondegrading hysteretic systems is proposed.

Subject Headings: Linear functions | Linear analysis | Earthquakes | Damping | Geometrics | Energy methods | Resonance |

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