Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Geomechanics and Engineering Volume 38, Number 2, July25 2024 , pages 165-177 DOI: https://doi.org/10.12989/gae.2024.38.2.165 |
|
|
|
Analysis of behavioral characteristics of liquefaction of sand through repeated triaxial compression test and numerical analysis |
||
Hyeok Seo and Daehyeon Kim
|
||
| Abstract | ||
| Liquefaction phenomenon refers to a phenomenon in which excess pore water pressure occurs when a dynamic load such as an earthquake is rapidly applied to a loose sandy soil ground where the ground is saturated, and the ground loses effective stress and becomes liquid. The laboratory repetition test for liquefaction evaluation can be performed through a repeated triaxial compression test and a repeated shear test. In this regard, this study attempted to evaluate the effects of the relative density of sand on the liquefaction resistance strength according to particle size distribution using repeated triaxial compression tests, and additional experimental verification using numerical analysis was conducted to overcome the limitations of experimental equipment. As a result of the experiment, it was confirmed that the liquefaction resistance strength increased as the relative density increased regardless of the classification of soil, and the liquefaction resistance strength of the SP sample close to SW was quite high. As a result of numerical analysis, it was confirmed that the liquefaction resistance strength increased as the confining pressure increased under the same relative density, and the liquefaction resistance strength did not decrease below a certain limit even though the confining pressure was significantly reduced at a relatively low relative density. This is judged to be due to a change in confining pressure according to the depth of the ground. As a result of analyzing the liquefaction resistance strength according to the frequency range, it was confirmed that there was no significant difference from the laboratory experiment results in the basic range of 0.1 to 1.0 Hz. | ||
| Key Words | ||
| liquefaction; numerical analysis; poorly graded soil; relative density; repeated triaxial test; well graded soil | ||
| Address | ||
| Hyeok Seoa and Daehyeon Kim: Department of Civil Engineering,Chosun Univercity, 309 Pilmundaero, Don-gu, Gwangju, Republic of Korea | ||