Application of load-dependent Ritz vectors to probabilistic damage detection

Hoon Sohn; Kincho H. Law

doi:10.1117/12.310603

17 June 1998 Application of load-dependent Ritz vectors to probabilistic damage detection

Hoon Sohn, Kincho H. Law

Proceedings Volume 3325, Smart Structures and Materials 1998: Smart Systems for Bridges, Structures, and Highways; (1998) https://doi.org/10.1117/12.310603
Event: 5th Annual International Symposium on Smart Structures and Materials, 1998, San Diego, CA, United States

Abstract

This paper demonstrates the possibility of incorporating load- dependent Ritz vectors, as an alternative to modal parameters, into a Bayesian probabilistic framework for detecting damages in a structure. Recent research has shown that it is possible to extract load-dependent Ritz vectors from vibration tests. This paper shows that load-dependent Ritz vectors have the following potential advantages for damage detection over modal vectors: (1) In general, load-dependent Ritz vectors are more sensitive to damage than the corresponding modal vectors, and (2) substructures of interest can be made more observable using the load-dependent Ritz vectors generated from particular load patterns. An eight-bay truss structure and a five-story frame example are presented to illustrate the applicability of the proposed approach.

Citation Download Citation

Hoon Sohn and Kincho H. Law "Application of load-dependent Ritz vectors to probabilistic damage detection", Proc. SPIE 3325, Smart Structures and Materials 1998: Smart Systems for Bridges, Structures, and Highways, (17 June 1998); https://doi.org/10.1117/12.310603

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