Determination of structural and damage detection system influencing parameters on the value of information
(2020) In Structural Health Monitoring- Abstract
- A method to determine the influencing parameters of a structural and damage detection system is proposed based on the value of information analysis. The value of information analysis utilizes the Bayesian pre-posterior decision theory to quantify the value of damage detection system for the structural integrity management during service life. First, the influencing parameters of the structural system, such as deterioration type and rate are introduced for the performance of the prior probabilistic system model. Then the influencing parameters on the damage detection system performance, including number of sensors, sensor locations, measurement noise, and the Type-I error are investigated. The pre-posterior probabilistic model is computed... (More)
- A method to determine the influencing parameters of a structural and damage detection system is proposed based on the value of information analysis. The value of information analysis utilizes the Bayesian pre-posterior decision theory to quantify the value of damage detection system for the structural integrity management during service life. First, the influencing parameters of the structural system, such as deterioration type and rate are introduced for the performance of the prior probabilistic system model. Then the influencing parameters on the damage detection system performance, including number of sensors, sensor locations, measurement noise, and the Type-I error are investigated. The pre-posterior probabilistic model is computed utilizing the Bayes? theorem to update the prior system model with the damage indication information. Finally, the value of damage detection system is quantified as the difference between the maximum utility obtained in pre-posterior and prior analysis based on the decision tree analysis, comprising structural probabilistic models, consequences, as well as benefit and costs analysis associated with and without monitoring. With the developed approach, a case study on a statically determinate Pratt truss bridge girder is carried out to validate the method. The analysis shows that the deterioration rate is the most sensitive parameter on the effect of relative value of information over the whole service life. Furthermore, it shows that more sensors do not necessarily lead to a higher relative value of information; only specific sensor locations near the highest utilized components lead to a high relative value of information; measurement noise and the Type-I error should be controlled and be as small as possible. An optimal sensor employment with highest relative value of information is found. Moreover, it is found that the proposed method can be a powerful tool to develop optimal service life maintenance strategies?before implementation?for similar bridges and to optimize the damage detection system settings and sensor configuration for minimum expected costs and risks. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/25a2a9ba-4b67-4d72-9046-7d99f76e1cbd
- author
- Long, Lijia ; Döhler, Michael and Thöns, Sebastian LU
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Structural Health Monitoring
- publisher
- SAGE Publications
- external identifiers
-
- scopus:85078325267
- ISSN
- 1475-9217
- DOI
- 10.1177/1475921719900918
- language
- English
- LU publication?
- no
- id
- 25a2a9ba-4b67-4d72-9046-7d99f76e1cbd
- date added to LUP
- 2020-09-08 18:37:49
- date last changed
- 2022-04-19 00:34:09
@article{25a2a9ba-4b67-4d72-9046-7d99f76e1cbd,
abstract = {{A method to determine the influencing parameters of a structural and damage detection system is proposed based on the value of information analysis. The value of information analysis utilizes the Bayesian pre-posterior decision theory to quantify the value of damage detection system for the structural integrity management during service life. First, the influencing parameters of the structural system, such as deterioration type and rate are introduced for the performance of the prior probabilistic system model. Then the influencing parameters on the damage detection system performance, including number of sensors, sensor locations, measurement noise, and the Type-I error are investigated. The pre-posterior probabilistic model is computed utilizing the Bayes? theorem to update the prior system model with the damage indication information. Finally, the value of damage detection system is quantified as the difference between the maximum utility obtained in pre-posterior and prior analysis based on the decision tree analysis, comprising structural probabilistic models, consequences, as well as benefit and costs analysis associated with and without monitoring. With the developed approach, a case study on a statically determinate Pratt truss bridge girder is carried out to validate the method. The analysis shows that the deterioration rate is the most sensitive parameter on the effect of relative value of information over the whole service life. Furthermore, it shows that more sensors do not necessarily lead to a higher relative value of information; only specific sensor locations near the highest utilized components lead to a high relative value of information; measurement noise and the Type-I error should be controlled and be as small as possible. An optimal sensor employment with highest relative value of information is found. Moreover, it is found that the proposed method can be a powerful tool to develop optimal service life maintenance strategies?before implementation?for similar bridges and to optimize the damage detection system settings and sensor configuration for minimum expected costs and risks.}},
author = {{Long, Lijia and Döhler, Michael and Thöns, Sebastian}},
issn = {{1475-9217}},
language = {{eng}},
publisher = {{SAGE Publications}},
series = {{Structural Health Monitoring}},
title = {{Determination of structural and damage detection system influencing parameters on the value of information}},
url = {{http://dx.doi.org/10.1177/1475921719900918}},
doi = {{10.1177/1475921719900918}},
year = {{2020}},
}