Nonlinear Dynamic Response of Framed Structures Using the Mode Superposition Method

by Mohamed W. Fahmy, Univ of Miami, Coral Gables, United States,
Ahmad H. Namini, Univ of Miami, Coral Gables, United States,

Document Type: Proceeding Paper

Part of: Engineering Mechanics


This paper describes a methodology for nonlinear dynamic response analysis of framed structures using the mode superposition method. A portal frame example is presented and compared to classical methods for determination of critical buckling loads. Results indicate that the critical buckling load via a dynamic analysis is one-half that of a static analysis due to a dynamic magnification factor of two for long duration dynamic loads of constant magnitude.

Subject Headings: Critical loads | Nonlinear analysis | Nonlinear response | Dynamic response | Frames | Structural response | Dynamic analysis | Load duration

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