Details
Original language | English |
---|---|
Article number | 117672 |
Number of pages | 22 |
Journal | Computer Methods in Applied Mechanics and Engineering |
Volume | 435 |
Early online date | 21 Dec 2024 |
Publication status | E-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
- Engineering(all)
- Computational Mechanics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
- Physics and Astronomy(all)
- General Physics and Astronomy
- Computer Science(all)
- Computer Science Applications
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In: Computer Methods in Applied Mechanics and Engineering, Vol. 435, 117672, 15.02.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Simulation-guided PGD-Stereocorrelation for hybrid testing
AU - Chang, Xuyang
AU - Bodnar, Bastien
AU - Grashorn, Jan
AU - Hild, François
AU - Gatuingt, Fabrice
AU - Roux, Stéphane
N1 - Publisher Copyright: © 2024 Elsevier B.V.
PY - 2024/12/21
Y1 - 2024/12/21
N2 - 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.
AB - 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.
KW - Proper generalized decomposition
KW - Real-time hybrid testing
KW - Stereocorrelation
UR - http://www.scopus.com/inward/record.url?scp=85212587656&partnerID=8YFLogxK
U2 - 10.1016/j.cma.2024.117672
DO - 10.1016/j.cma.2024.117672
M3 - Article
AN - SCOPUS:85212587656
VL - 435
JO - Computer Methods in Applied Mechanics and Engineering
JF - Computer Methods in Applied Mechanics and Engineering
SN - 0045-7825
M1 - 117672
ER -