Damage Evaluation of an Axially Loaded Beam Using Modal Flexibility  

Oleh:

Byeong Hwa Kim ; Hwan Joong Joo

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: KSCE Journal of Civil Engineering vol. 11 no. 2 (2007), page 101-110.
Topik: Damage Detection; Flexural Damage Index; Curvature of Mode Shape; Modal Flexibility Eigenvalue; Eigenvector; Singular Value Decomposition; Beam-Column

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: KK25.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

This work proposes a new nondestructive damage evaluation method that can detect, locate, and size damage by utilizing dynamically measured modal flexibility. The proposed method is particularly useful for a slender beam under an axial force, It belongs to the response-based approach because the response data are directly related to damage without the use of a numerical model. An equation governing the damage-mechanism is theoretically derived from modal flexibility. Solving the set of resulting equations provides the evaluation of damage. The accuracy of the proposed method is verified using a set of numerical simulations. The proposed method attempts to resolve the mode selection problem, the singularity problem, the axial force problem, and the absolute severity estimation problem, all of which exist in earlier attempts. The proposed method is capable of conducting detailed local inspections using incomplete measured modal parameters of a selected class of structures.

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