Structural Damage Assessment by Using Stiffness-based Method and Cubic Spline Interpolation

Wei Chih Su*, Chiung-Shiann Huang, Jyh Horng Wu

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


This study explores the possibility of using stiffness-based method and cubic spline interpolation to locate the damaged storey of a building during a strong earthquake, and corresponding stiffness matrix of structure often change in the earthquake process. The time series model of a building is established from the full structural dynamic responses. Next, the coefficient matrix of the time series model could be solved by recursive least squares (RLS) algorithms. Then, the model parameters of a building are calculated by the coefficient matrix of time series model. Finally, the identified natural frequencies and mode shapes of structure that corrected by cubic spline interpolation would be used to construct the stiffness matrix of a building. Then, the damage location of a building could be detected by the identified stiffness matrix of a building. The effectiveness of the proposed procedure is verified using numerically simulated earthquake responses of the finite element model of a six-storey frame.

Original languageEnglish
Article number01004
JournalMATEC Web of Conferences
StatePublished - 14 Sep 2018
Event3rd International Conference on Inventions, ICI 2017 - Sun Moon Lake, Taiwan
Duration: 29 Sep 20172 Oct 2017


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