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Stiffness Parameters Identification of Frames

by Morteza A. M. Torkamani, Univ of Pittsburgh, Pittsburgh, PA, USA,
Ahmad K. Ahmadi, Univ of Pittsburgh, Pittsburgh, PA, USA,



Document Type: Proceeding Paper

Part of: Dynamic Response of Structures

Abstract:

Four widely used methods of structural system identification are presented. A new formula and its derivation, based on the Bayesian estimation theory, is given. Time domain responses of a frame when subjected to the ground motion of El-Centro earthquake are computed and transformed to the frequency domain. Frequencies and mode shapes of the frame are extracted from Fourier Spectra. Using these frequencies and mode shapes, a parametric study is conducted, and the methods are compared. The advantages, disadvantages, and problems of each method are discussed.

Subject Headings: Frames | Parameters (statistics) | Comparative studies | Stiffening | Earthquakes | Structural system identification | Ground motion

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