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The Scientific World Journal
Volume 2013 (2013), Article ID 198483, 9 pages
Research Article

Ambient Vibration Testing for Story Stiffness Estimation of a Heritage Timber Building

Department of Architectural Engineering, Dankook University, Yongin 448-701, Republic of Korea

Received 26 July 2013; Accepted 1 September 2013

Academic Editors: D. G. Aggelis, N. Alver, and H. K. Chai

Copyright © 2013 Kyung-Won Min et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper investigates dynamic characteristics of a historic wooden structure by ambient vibration testing, presenting a novel estimation methodology of story stiffness for the purpose of vibration-based structural health monitoring. As for the ambient vibration testing, measured structural responses are analyzed by two output-only system identification methods (i.e., frequency domain decomposition and stochastic subspace identification) to estimate modal parameters. The proposed methodology of story stiffness is estimation based on an eigenvalue problem derived from a vibratory rigid body model. Using the identified natural frequencies, the eigenvalue problem is efficiently solved and uniquely yields story stiffness. It is noteworthy that application of the proposed methodology is not necessarily confined to the wooden structure exampled in the paper.