CaltechAUTHORS
  A Caltech Library Service

Monitoring Structural Health Using a Probabilistic Measure

Beck, James L. and Au, Siu-Kui and Vanik, Michael W. (2001) Monitoring Structural Health Using a Probabilistic Measure. Computer-Aided Civil and Infrastructure Engineering, 16 (1). pp. 1-11. ISSN 1093-9687 . https://resolver.caltech.edu/CaltechAUTHORS:20120829-133858966

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20120829-133858966

Abstract

A Bayesian probabilistic methodology for structural health monitoring is presented. The method uses a sequence of identified modal parameter data sets to continually compute the probability of damage. In this approach, a high likelihood of a reduction in model stiffness at a location is taken as a proxy for damage at the corresponding structural location. The concept extends the idea of using as indicators of damage the changes in model parameters identified using a linear finite-element model and modal parameter data sets from the structure in undamaged and possibly damaged states. This extension is needed because of uncertainties in the updated model parameters that in practice obscure health assessment. These uncertainties arise due to effects such as variation in the identified modal parameters in the absence of damage, as well as unavoidable model error. The method is illustrated by simulating on-line monitoring, wherein specified modal parameters are identified on a regular basis and the probability of damage for each substructure is continually updated. Examples are given for abrupt onset of damage and progressive deterioration.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://onlinelibrary.wiley.com/doi/10.1111/0885-9507.00209/abstractPublisherUNSPECIFIED
http://dx.doi.org/10.1111/0885-9507.00209DOIUNSPECIFIED
Additional Information:© 2001 Computer-Aided Civil and Infrastructure Engineering. Published by Blackwell Publishers.
Issue or Number:1
Record Number:CaltechAUTHORS:20120829-133858966
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120829-133858966
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33670
Collection:CaltechAUTHORS
Deposited By: Carmen Nemer-Sirois
Deposited On:29 Aug 2012 21:14
Last Modified:03 Oct 2019 04:12

Repository Staff Only: item control page