Generation of excess pore pressure in sands subjected to cyclic triaxial loading

CEN Jun; PENG Hao; WEI Xiao; YANG Zhongxuan; YANG Jun; CHENG Yan

doi:10.11779/CJGE2023S20038

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 264-269. > DOI: 10.11779/CJGE2023S20038

CEN Jun, PENG Hao, WEI Xiao, YANG Zhongxuan, YANG Jun, CHENG Yan. Generation of excess pore pressure in sands subjected to cyclic triaxial loading[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 264-269. DOI: 10.11779/CJGE2023S20038

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Generation of excess pore pressure in sands subjected to cyclic triaxial loading

1.
Zhejiang Communications Construction Group Co., LTD., Fuyang 311421, China
2.
Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China
3.
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
4.
Department of Civil Engineering, The University of Hong Kong, Hong Kong, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

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Abstract

Abstract

The excess pore pressure induced by seismic loading leads to soil liquefaction. Proper characterization of the pore pressure generation due to cyclic loadings is essential for liquefaction analysis of soils. The results of a series of undrained cyclic triaxial tests based on clean sand and silty sand with fines of 10% are introduced. The data are analyzed in the framework of two pore pressure models (uniform cyclic stress model and energy dissipation model). A new uniform cyclic stress model is proposed to better characterize the pore pressure generation, and the model parameters are calibrated. Meanwhile, a one-parameter energy dissipation model is calibrated and analyzed as well. It is found that the parameters of the uniform cyclic stress model are mainly affected by the amplitude of the stress cycles and mildly affected by the fines content, while the parameters of the energy dissipation model are mainly affected by the packing density and soil type.
- soil liquefaction,
- sand,
- excess pore pressure,
- uniform cyclic stress model,
- energy dissipation model

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References (13)

References

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