Long-term viscoelastic deformation monitoring of a concrete dam

Long-term viscoelastic deformation monitoring of a concrete dam: A multi-output surrogate model approach for parameter identification

Lin, Chaoning (Hohai University)
Li, Tongchun (Hohai University)
Chen, Siyu (Nanjing Hydraulic Research Institute)
Yuan, Li (Hohai University)
van Gelder, P.H.A.J.M. (TU Delft Safety and Security Science)
Yorke-Smith, N. (TU Delft Algorithmics)

2022

Dam safety monitoring has become an important topic and is critical for evaluating a dam's safety status. This study focuses on identifying the mechanical properties of a concrete dam from long-term viscoelastic deformation monitoring data. A novel inversion framework is proposed in which a surrogate model, instead of the finite element model, is placed inside the optimization loop. First, a multi-output surrogate model based on Gaussian process is trained by using data from a finite element simulation in the creep regime. In order to efficiently create a high-precision and reliable surrogate model, three test instances are conducted to investigate the impact of sample size, parameter range and output quantity on the performance of the surrogate model. Subsequently, a meta-heuristic optimization, multi-verse optimizer, is employed to identify the unknown viscoelastic parameters. The results illustrate that the identified properties allow predictions on dam displacement which are consistent with the monitoring data. Compared with the traditional inversion method based on finite element modelling, the proposed inversion method based on the multi-output surrogate model not only achieves accurate estimation of mechanical parameters but also greatly improves computational efficiency.

Concrete dam
Inverse analysis
Multi-output Gaussian process
Surrogate model
Viscoelasticity

http://resolver.tudelft.nl/uuid:93439ac0-5f86-407c-bf87-6e9b6fa679f1

https://doi.org/10.1016/j.engstruct.2022.114553

2023-01-09

0141-0296

Engineering Structures, 266

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 Chaoning Lin, Tongchun Li, Siyu Chen, Li Yuan, P.H.A.J.M. van Gelder, N. Yorke-Smith