Loading...
Please wait, while we are loading the content...
Experimental and computational study on effects of permeability on liquefaction
| Content Provider | Scilit |
|---|---|
| Author | Funahara, H. Tomita, N. |
| Copyright Year | 2018 |
| Description | Two cases of centrifuge tests with base shaking were conducted to study the effect of soil permeability on liquefaction due to a long duration seismic excitation. It was confirmed that reduced permeability increases liquefaction extent and elongates the dissipation duration of the excess pore water pressure. Numerical simulations using an effective stress FE method were also conducted, and the same tendencies were observed. Through a series of parametric numerical studies using different permeability, it was predicted that gravelly ground might not liquefy with the same input motion and the dissipation duration of liquefied non-plastic silty ground could be more than 24 hours. Two cases of centrifuge tests with base shaking were conducted to study the effect of soil permeability on liquefaction due to a long duration seismic excitation. It was confirmed that reduced permeability increases liquefaction extent and elongates the dissipation duration of the excess pore water pressure. Due to the 2011 Tohoku earthquake in Japan, extensive liquefaction occurred in reclaimed lands of the Tokyo Bay area that were far from the epicentre. A practical methodology to evaluate design earthquake ground motions that consider the effect of liquefaction is an effective stress dynamic analysis method. This chapter tries to conduct dynamic shaking table testing in a centrifugal field in order to reproduce the liquefaction caused by a long duration earthquake and observed the pore water pressure and ground accelerations. Additionally, there was a particular focus on the effect of soil permeability on this liquefaction. The chapter studies numerical simulations were conducted and the effect of liquefaction strength and permeability. Book Name: Physical Modelling in Geotechnics |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2018-0-86960-X&isbn=9780429438646&doi=10.1201/9780429438646-30&format=pdf |
| Ending Page | 966 |
| Page Count | 6 |
| Starting Page | 961 |
| DOI | 10.1201/9780429438646-30 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Physical Modelling in Geotechnics Geological Engineering Stress Liquefaction Permeability Numerical Simulations Pore Water Pressure Centrifuge Shaking Long Duration |
| Content Type | Text |
| Resource Type | Chapter |
