TY - JOUR
T1 - Model updating techniques for damage detection in concrete beam using optical fiber strain measurement device
AU - Waeytens, J.
AU - Rosić, B.
AU - Charbonnel, P.-E.
AU - Merliot, E.
AU - Siegert, D.
AU - Chapeleau, X.
AU - Vidal, R.
AU - le Corvec, V.
AU - Cottineau, L.-M.
PY - 2016/12/15
Y1 - 2016/12/15
N2 - The article aims at detecting and quantifying early structural damages using deterministic and probabilistic model updating techniques. To achieve this purpose, local information in a form of optical strain measurement is employed. The strategy consists in updating physical parameters associated to damages, such as Young's modulus, in order to minimize the gap between the numerical strain obtained from finite element solves and the strain sensor outputs. Generally, the damage estimation is an ill-posed inverse problem, and hence requires regularization. Herein, three model updating techniques are considered involving different type of regularization: classical Tikhonov regularization, constitutive relation error based updating method and Bayesian approach. An illustration of these three approaches is proposed for localizing and quantifying an early damage in a real 8 m post-tensioned concrete beam. Numerical results show that all the methods properly localize the damaged area and give similar estimation of the damage level.
AB - The article aims at detecting and quantifying early structural damages using deterministic and probabilistic model updating techniques. To achieve this purpose, local information in a form of optical strain measurement is employed. The strategy consists in updating physical parameters associated to damages, such as Young's modulus, in order to minimize the gap between the numerical strain obtained from finite element solves and the strain sensor outputs. Generally, the damage estimation is an ill-posed inverse problem, and hence requires regularization. Herein, three model updating techniques are considered involving different type of regularization: classical Tikhonov regularization, constitutive relation error based updating method and Bayesian approach. An illustration of these three approaches is proposed for localizing and quantifying an early damage in a real 8 m post-tensioned concrete beam. Numerical results show that all the methods properly localize the damaged area and give similar estimation of the damage level.
KW - Damage detection techniques
KW - Model updating
KW - Optic fiber
KW - Structural Health Monitoring
UR - http://www.scopus.com/inward/record.url?scp=85006699072&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2016.08.004
DO - 10.1016/j.engstruct.2016.08.004
M3 - Article
AN - SCOPUS:85006699072
SN - 0141-0296
VL - 129
SP - 2
EP - 10
JO - Engineering Structures
JF - Engineering Structures
ER -