Abstract
This paper presents a global damage detection and assessment algorithm based on a parameter estimation method using a finite-element model and the measured modal response of a structure. Damage is characterized as a reduction of the member constitutive parameter from a known baseline value. An optimization scheme is proposed to localize damaged parts of the structure. The algorithm accounts for the possibility of multiple solutions to the parameter estimation problem that arises from using spatially sparse measurements. Errors in parameter estimates caused by sensitivity to measurement noise are reduced by selecting a near-optimal measurement set from the data at each stage of the localization algorithm. Damage probability functions are computed upon completion of the localization process for candidate elements. Monte Carlo methods are used to compute the required probabilities based on the statistical distributions of the parameters for the damaged and the associated baseline structure. The algorithm is tested in a numerical simulation environment using a planar bridge truss as a model problem.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 135-145 |
| Number of pages | 11 |
| Journal | Journal of Engineering Mechanics |
| Volume | 129 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2003 |
| Externally published | Yes |
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Keywords
- Damage assessment
- Finite element method
- Sensitivity analysis
- Structures
ASJC Scopus subject areas
- Mechanical Engineering
Cite this
Structural damage detection and assessment from modal response. / Pothisiri, T.; Hjelmstad, Keith.
In: Journal of Engineering Mechanics, Vol. 129, No. 2, 02.2003, p. 135-145.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Structural damage detection and assessment from modal response
AU - Pothisiri, T.
AU - Hjelmstad, Keith
PY - 2003/2
Y1 - 2003/2
N2 - This paper presents a global damage detection and assessment algorithm based on a parameter estimation method using a finite-element model and the measured modal response of a structure. Damage is characterized as a reduction of the member constitutive parameter from a known baseline value. An optimization scheme is proposed to localize damaged parts of the structure. The algorithm accounts for the possibility of multiple solutions to the parameter estimation problem that arises from using spatially sparse measurements. Errors in parameter estimates caused by sensitivity to measurement noise are reduced by selecting a near-optimal measurement set from the data at each stage of the localization algorithm. Damage probability functions are computed upon completion of the localization process for candidate elements. Monte Carlo methods are used to compute the required probabilities based on the statistical distributions of the parameters for the damaged and the associated baseline structure. The algorithm is tested in a numerical simulation environment using a planar bridge truss as a model problem.
AB - This paper presents a global damage detection and assessment algorithm based on a parameter estimation method using a finite-element model and the measured modal response of a structure. Damage is characterized as a reduction of the member constitutive parameter from a known baseline value. An optimization scheme is proposed to localize damaged parts of the structure. The algorithm accounts for the possibility of multiple solutions to the parameter estimation problem that arises from using spatially sparse measurements. Errors in parameter estimates caused by sensitivity to measurement noise are reduced by selecting a near-optimal measurement set from the data at each stage of the localization algorithm. Damage probability functions are computed upon completion of the localization process for candidate elements. Monte Carlo methods are used to compute the required probabilities based on the statistical distributions of the parameters for the damaged and the associated baseline structure. The algorithm is tested in a numerical simulation environment using a planar bridge truss as a model problem.
KW - Damage assessment
KW - Finite element method
KW - Sensitivity analysis
KW - Structures
UR - http://www.scopus.com/inward/record.url?scp=0037326075&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037326075&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)0733-9399(2003)129:2(135)
DO - 10.1061/(ASCE)0733-9399(2003)129:2(135)
M3 - Article
AN - SCOPUS:0037326075
VL - 129
SP - 135
EP - 145
JO - Journal of Engineering Mechanics - ASCE
JF - Journal of Engineering Mechanics - ASCE
SN - 0733-9399
IS - 2
ER -