Seismic-Response Assessment of Multiblock Tower Structures for Energy Storage: 1/25 Scale
Publication: Journal of Structural Engineering
Volume 150, Issue 5
Abstract
This paper discusses the results of scale shake table tests evaluating the seismic response of multiblock tower structures (MTSs) conceived as energy storage systems. The tests described here are a part of a comprehensive research campaign involving smaller physical models, computational model validation, and the theoretical background required to compare results across scales. The 6.46-m-high MTSs consisted of over 7,000 concrete blocks stacked vertically without any bonding agent, interacting only by friction and rocking. Three MTSs were tested under two different ground motions. Dynamic digital image correlation (DIC) and low-cost micro electrical mechanical system (MEMS) accelerometers were used for dynamic response measurements. Towers 1 and 3, subjected to repeated strong-intensity earthquake ground motions, collapsed during the third repetition due to the accumulation of residual displacements. Tower 2 was subjected to a single near-fault ground motion representing an extreme event and collapsed during the test. Different collapse mechanisms were identified in the test program. Data collected from individual blocks showed in-plane and out-of-phase block rotation and sliding, which contributed to the system’s energy dissipation during the tests.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
We gratefully acknowledge the support, encouragement, and freedom provided by Energy Vault, Inc. during this project. We also thank the contractors (Whiteside Concrete Construction, Dynamic Isolation Systems, BlockMex, Luka Grip and Lighting, Abel-Cine, Samy’s Camera) and university facility personnel at UC Berkeley for their commitment to this project.
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Published In
Journal of Structural Engineering
Volume 150 • Issue 5 • May 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 28, 2023
Accepted: Nov 28, 2023
Published online: Mar 6, 2024
Published in print: May 1, 2024
Discussion open until: Aug 6, 2024
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