The Effect of Soil Damping on the Soil-Pile-Structure Interaction Analyses in Liquefiable and Non-liquefiable Soils

Ozan Alver*, E. Ece Eseller-Bayat

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Özet

Preliminary design of piles is performed by considering the static loads, but the final design must include the dynamic loads, especially in earthquake-prone regions. The soil nonlinearity under seismic loading is evaluated using the modulus degradation curves in the total-stress approach. In this study, two different centrifuge tests were simulated in FLAC3D. The nonlinear elastic method (hyper-bolic model) and the elastoplastic Mohr-Coulomb (MC) model were employed in the study. The soil-single pile-structure systems were analyzed under the specific earthquake events, and the soil-pile-structure response was compared. The analyses with the low-intensity input motions show that the superstructure accelerations and the bending moments in the single pile are estimated with reasonable accuracy. However, the superstructure accelerations might be underestimated, especially in the MC model, compared to the centrifuge test results due to the increase in the amplitude of the input motion. The low accelerations can be attributed to the high damping ratios in the perfectly plastic constitutive model. Although the nonlinear elastic model is less complex, closer results might be obtained since the more realistic damping ratios are implemented. The results show that even the less elaborate models, such as the hyperbolic model with an indefinite failure criterion, might give reasonably accurate results in the total-stress approach, thanks to the limited damping ratios. As a result, the responses of the superstructure and the pile in soil-pile-structure interaction problems are highly dependent on the soil damping; in turn, the due account must be given to the selection of the constitutive model.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıGeotechnical, Geological and Earthquake Engineering
YayınlayanSpringer Science and Business Media B.V.
Sayfalar1059-1066
Sayfa sayısı8
DOI'lar
Yayın durumuYayınlandı - 2022

Yayın serisi

AdıGeotechnical, Geological and Earthquake Engineering
Hacim52
ISSN (Basılı)1573-6059
ISSN (Elektronik)1872-4671

Bibliyografik not

Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2022.

Finansman

Acknowledgment. This research was funded by TUBITAK (The Scientific and Technological Research Council of Turkey) under the Grant No. 119M624 and project title “Development of Lateral Load Resistance-Deflection Curves for Piles in Sands under Earthquake Excitation”.

FinansörlerFinansör numarası
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu119M624

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