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Pro029

Global estimates of structural degradation for lifetime management



Title: Global estimates of structural degradation for lifetime management
Author(s): Y. S. Petryna, F. Stangenberg
Paper category : conference
Book title: 2nd International RILEM Workshop on Life Prediction and Aging Management of Concrete Structures
Editor(s): D.J. Naus
Print-ISBN: 2-912143-36-5
e-ISBN: 2912143780
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 31 - 38
Total Pages: 8
Nb references: 10
Language: English


Abstract: The present contribution proposes an approach to estimate remaining structural carrying capacity on the basis of dynamic response measurements or calculations. The global damage measure recently proposed by the authors exhibits an acceptable sensitivity to damage independently of its origin and a good correlation with the actual damage degree. Since the ultimate capacity mirrors the safety level under stationary loads, this damage measure can be used as a simple indirect estimate of structural safety during service life. The damage indicator proposed is a normalized function ranging by definition from zero in the state without damage to unity in the case of failure. It has been shown to be closely connected to the Modal Assurance Criterion, a standard tool of modal analysis and vibration monitoring. The damage indicator can thus be easily determined on the basis of usual information available from forced or ambient vibration measurements. The present contribution shows, how this damage indicator can be applied to structural lifetime management in decision-making systems or inspection planning.


Online publication: 2003-04-02
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143780.004