Statistical Damage Assessment of Framed Structures from Static Responses
Publication: Journal of Engineering Mechanics
Volume 126, Issue 4
Abstract
This paper presents a damage assessment algorithm for framed structures based on a system identification scheme with a regularization technique. The regularization technique is introduced to alleviate the ill-posedness of the system identification problems. A new regularization function based on the Frobenius norm of the difference between the estimated and the baseline stiffness matrix is proposed. A parameter grouping technique is adopted to locate damaged members and to overcome sparseness of measured data. A data perturbation method is employed to obtain statistical distributions of system parameters with a set of noise-polluted measured data. A statistical approach by a hypothesis test is presented to assess damage. The validity of the proposed method is demonstrated through numerical examples.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 126 • Issue 4 • April 2000
Pages: 414 - 421
History
Received: Dec 31, 1998
Published online: Apr 1, 2000
Published in print: Apr 2000
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