Simulation-guided PGD-Stereocorrelation for hybrid testing

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Xuyang Chang
  • Bastien Bodnar
  • Jan Grashorn
  • François Hild
  • Fabrice Gatuingt
  • Stéphane Roux

External Research Organisations

  • University of Science and Technology Beijing
  • École normale supérieure Paris-Saclay (ENS Paris-Saclay)
  • Conservatoire National des Arts et Metiers
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Details

Original languageEnglish
Article number117672
Number of pages22
JournalComputer Methods in Applied Mechanics and Engineering
Volume435
Early online date21 Dec 2024
Publication statusE-pub ahead of print - 21 Dec 2024

Abstract

Hybrid testing aims to evaluate the dynamics of a large scale structure from which an isolated part is experimentally tested, while the rest is simulated in the control loop for prescribing earthquake-induced motions at boundaries. One of these tests, led in real-time on a three-story reinforced concrete structure to quantify damage due to successive multiaxial seismic loadings, and focusing experimentally on a single column, is considered in this study. Stereocorrelation (SC) using high speed cameras is an appealing technique to further analyze such tests, providing 3D surface displacement fields and damage indications. Assuming a spacetime separation of the kinematics and constructing a tailored temporal basis, Proper Generalized Decomposition SC (PGD-SC) is well-suited to handle long image series efficiently. Furthermore, it aligns perfectly with the philosophy of model (hyper-)reduction on the simulation side as needed for real-time control. The present study explores the potential of using temporal modes extracted from both existing simulations and image series for SC analyses. It is shown that the simulation-guided PGD-SC outperforms the classical PGD-SC in terms of computation time with a minimal implementation effort. The kinematic measurements also highlight the direction in which the numerical model should be refined to better account for the observed non-linearities. The perspective of using such simulation-guided PGD-SC into hybrid testing protocols (including pseudo-dynamic experiments) appears credible.

Keywords

    Proper generalized decomposition, Real-time hybrid testing, Stereocorrelation

ASJC Scopus subject areas

Cite this

Simulation-guided PGD-Stereocorrelation for hybrid testing. / Chang, Xuyang; Bodnar, Bastien; Grashorn, Jan et al.
In: Computer Methods in Applied Mechanics and Engineering, Vol. 435, 117672, 15.02.2025.

Research output: Contribution to journalArticleResearchpeer review

Chang, X., Bodnar, B., Grashorn, J., Hild, F., Gatuingt, F., & Roux, S. (2025). Simulation-guided PGD-Stereocorrelation for hybrid testing. Computer Methods in Applied Mechanics and Engineering, 435, Article 117672. Advance online publication. https://doi.org/10.1016/j.cma.2024.117672
Chang X, Bodnar B, Grashorn J, Hild F, Gatuingt F, Roux S. Simulation-guided PGD-Stereocorrelation for hybrid testing. Computer Methods in Applied Mechanics and Engineering. 2025 Feb 15;435:117672. Epub 2024 Dec 21. doi: 10.1016/j.cma.2024.117672
Chang, Xuyang ; Bodnar, Bastien ; Grashorn, Jan et al. / Simulation-guided PGD-Stereocorrelation for hybrid testing. In: Computer Methods in Applied Mechanics and Engineering. 2025 ; Vol. 435.
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