TY - JOUR
T1 - Structural responses of energy storage pile foundations under thermal-mechanical loadings
AU - Bimaganbetova, Madina
AU - Zhang, Dichuan
AU - Kim, Jong
AU - Shon, Chang Seon
AU - Lee, Deuckhang
N1 - Funding Information:
Nazarbayev University funded this research under Faculty Development Competitive Research Grant No. 021220FD2151 . The authors are grateful for this support. Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of Nazarbayev University . The authors would also like to thank you for the support from the National Research Foundation of Korea (NRF) grant funded by the Korean government ( MSIT ) (No. 2020R1F1A1048422 ).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1
Y1 - 2022/1
N2 - Recently studies have investigated feasibilities to configure pile foundations as energy storage media using a small-scale compressed air energy storage technology. These studies consider that storage temperatures of compressed air can be lowered entirely down to ambient temperatures through a cooling process. This assumption may not be feasible and economical due to the efficiency of the cooling process. As an alternative option, a higher storage temperature can be allowed by reducing the cooling time, which can cause additional thermal-mechanical loadings to the pile foundation. This paper investigates structural responses of reinforced concrete pile foundations subjected to combined structural, compressed air pressure, and thermal-mechanical loadings through nonlinear dynamic heat transfer and thermal-mechanical analyses. Several parameters were studied, including pile spacing, pile inner diameters, and concrete grades. Analysis results show that thermal-mechanical loading can reduce critical tensile stresses and change stress distributions in the pile section originated from compressed air pressure. Design recommendations were made to determine an optimal storage temperature and an allowable loading cycle for the energy storage pile foundation.
AB - Recently studies have investigated feasibilities to configure pile foundations as energy storage media using a small-scale compressed air energy storage technology. These studies consider that storage temperatures of compressed air can be lowered entirely down to ambient temperatures through a cooling process. This assumption may not be feasible and economical due to the efficiency of the cooling process. As an alternative option, a higher storage temperature can be allowed by reducing the cooling time, which can cause additional thermal-mechanical loadings to the pile foundation. This paper investigates structural responses of reinforced concrete pile foundations subjected to combined structural, compressed air pressure, and thermal-mechanical loadings through nonlinear dynamic heat transfer and thermal-mechanical analyses. Several parameters were studied, including pile spacing, pile inner diameters, and concrete grades. Analysis results show that thermal-mechanical loading can reduce critical tensile stresses and change stress distributions in the pile section originated from compressed air pressure. Design recommendations were made to determine an optimal storage temperature and an allowable loading cycle for the energy storage pile foundation.
KW - Compressed air energy storage
KW - Energy storage pile foundation
KW - Structural response
KW - Thermal-mechanical loading
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U2 - 10.1016/j.jobe.2021.103539
DO - 10.1016/j.jobe.2021.103539
M3 - Article
AN - SCOPUS:85118475557
SN - 2352-7102
VL - 45
JO - Journal of Building Engineering
JF - Journal of Building Engineering
M1 - 103539
ER -