Some Contribution to Rational Design of Piled Raft Foundation for Oil Storage Tanks on Non-Liquefiable Ground: Application of Dynamic Centrifuge Modeling

Document Type : Research Article

Authors

1 Shiraz University of Technology

2 Department of Civil and Environmental Engineering, Tokyo Institute of Technology

Abstract

Some level of settlement is allowed in the design of oil tanks if uneven settlement is
controlled within allowable values. Considering the critical condition of Piled Raft
Foundation (PRF), that is, secure contact of raft base to the ground surface, PRF is
considered as one of the rational foundations for the oil tanks. However, PRF has a
complicated interaction with soil under horizontal seismic loading. Regarding this
complexity, the main concern in use of PRF for oil tanks is proper design of
this foundation system. In this study, a series of centrifuge tests were performed to
investigate the mechanical behavior of oil tanks supported by PRF on non-liquefiable
sand. Using the observed results, such as accelerations of the tank and ground
and displacements of the foundation, some practical hints for reasonable design of
piled raft foundation for oil tanks on non-liquefiable sand are discussed. According
to the results of this study, the main concern in the rational design of the foundation
is piles' design and their punching effect on the raft, in case of PRF of oil tank on
non-liquefiable sand.

Keywords

References

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Journal of Seismology and Earthquake Engineering
Volume 21, Issue 4
November 2019
Pages 1-9

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