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Development characteristics of excess pore water pressure in saturated marine coral sand based on shear strain characteristics: An experimental study
Highlights FC, D r, and CSR significantly affect the development characteristics of excess water pore pressure(EPWP) in saturated marine coral sand. EPWP shows a “sharp–smooth” development mode with γ a, and there is an arctangent relationship between r u and γ a. A prediction model for the development of EPWP based on shear strain characteristics was proposed. A virtually unique form of the correlation between the density-corrected EPWP model parameter B/(D r)1.5 and exists.
Abstract Using a hollow-cylinder torsional shear apparatus, we experimentally investigated the development characteristics of excess pore water pressure (EPWP) in saturated marine coral sand. These coral sand specimens were tested under various values of nonplastic fines content (FC), relative density (D r), and cyclic stress ratio (CSR). A laboratory cyclic torsional shear test under isotropic consolidation showed that the development rate of the EPWP ratio (R u) versus the number of cycles (N) increased with increasing FC and CSR but decreased with increasing D r. Additionally, the increase in FC significantly reduced the cyclic resistance ratio (CRR) of marine coral sand. For a given D r and FC, R u of the specimens under different CSR was uniquely related to the amplitude of the shear strain (γ a). Moreover, a pore pressure evaluation model based on shear strain characteristics was established. The measurements showed that the EPWP model parameter A is a soil-specific constant, and the density-corrected EPWP model parameter B/(D r)1.5 has a single negative-power relationship with the equivalent skeleton void ratio (.
Development characteristics of excess pore water pressure in saturated marine coral sand based on shear strain characteristics: An experimental study
Highlights FC, D r, and CSR significantly affect the development characteristics of excess water pore pressure(EPWP) in saturated marine coral sand. EPWP shows a “sharp–smooth” development mode with γ a, and there is an arctangent relationship between r u and γ a. A prediction model for the development of EPWP based on shear strain characteristics was proposed. A virtually unique form of the correlation between the density-corrected EPWP model parameter B/(D r)1.5 and exists.
Abstract Using a hollow-cylinder torsional shear apparatus, we experimentally investigated the development characteristics of excess pore water pressure (EPWP) in saturated marine coral sand. These coral sand specimens were tested under various values of nonplastic fines content (FC), relative density (D r), and cyclic stress ratio (CSR). A laboratory cyclic torsional shear test under isotropic consolidation showed that the development rate of the EPWP ratio (R u) versus the number of cycles (N) increased with increasing FC and CSR but decreased with increasing D r. Additionally, the increase in FC significantly reduced the cyclic resistance ratio (CRR) of marine coral sand. For a given D r and FC, R u of the specimens under different CSR was uniquely related to the amplitude of the shear strain (γ a). Moreover, a pore pressure evaluation model based on shear strain characteristics was established. The measurements showed that the EPWP model parameter A is a soil-specific constant, and the density-corrected EPWP model parameter B/(D r)1.5 has a single negative-power relationship with the equivalent skeleton void ratio (.
Development characteristics of excess pore water pressure in saturated marine coral sand based on shear strain characteristics: An experimental study
Qi, Wu (author) / You, Qin (author) / Luyang, Wang (author) / Qifei, Liu (author) / Haiyang, Zhuang (author) / Guoxing, Chen (author)
Applied Ocean Research ; 137
2023-05-07
Article (Journal)
Electronic Resource
English
An energy-based model for the generation of excess pore water pressure in saturated coral sand
| Taylor & Francis Verlag | 2024
| Taylor & Francis Verlag | 2024
| British Library Online Contents | 1995
| Taylor & Francis Verlag | 2012