Baseline-Based Detection of Structural Changes: Drawbacks and an Alternative Approach

João Santos 1 Luís Calado 2 Paulo Silveira 1 Christian Crémona 3
1 LNEC - National Laboratory for Civil Engineering [Lisboa]
2 IST - Instituto Superior Técnico, Universidade Técnica de Lisboa
3 Cerema Direction Centre-Est - Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Centre-Est
Abstract : The present paper addresses the detection of structural changes using statistical learning methods with the objective of exposing the major limitations of defining baselines in which structural systems must be assumed unchanged. For this purpose, the data acquired during approximately two years in a cable‑,stayed bridge is used and was chosen since it comprises unchanged structural responses as well as measurements comprising changes imposed by creep and shrinkage. In addition to the study of baseline‑,based detection, the present paper proposes a simple yet effective baseline‑,free approach relying auto‑,correlation functions. The effectiveness of the proposed strategy in clearly distinguishing between changed and unchanged structural responses was demonstrated using the same data set.
keyword : Damage assessment Normalization Monitoring
Type de document :
Communication dans un congrès
Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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João Santos, Luís Calado, Paulo Silveira, Christian Crémona. Baseline-Based Detection of Structural Changes: Drawbacks and an Alternative Approach. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01021194〉

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