Loading...
Please wait, while we are loading the content...
Similar Documents
Verification and validation of two-phase material point method simulation of pore water pressure rise and dissipation in earthquakes
| Content Provider | Scilit |
|---|---|
| Author | Kiriyama, T. Fukutake, K. Higo, Yosuke |
| Copyright Year | 2018 |
| Description | Book Name: Physical Modelling in Geotechnics |
| Abstract | Liquefaction of foundation ground during earthquakes can induce large deformations such as settlement of foundation structures, floating of underground structures, slope failures, and lateral spreading. Effective numerical simulation of these phenomena requires methods using specialized algorithms to account for the large deformations that geomaterials undergo. This work proposes a numerical simulator based on the particle-based Material Point Method (MPM), into which we introduce Biot’s porous media theory. Discretizing the governing equation for a two-phase material according to the MPM framework, the Bowl model for liquefaction constitutive model is employed for dilatancy and the Ramberg-Osgood model for the nonlinearity of stress-strain relationship. The simulator is verified by comparing with an exact solution and validated by carrying out centrifuge model testing. This paper reports on the formulation, verification and validation of the newly developed simulator. There have been repeated reports of soil liquefaction leading to disastrous effects such as soil outflows from developed residential lots, collapse of embankments, lateral spreading and uplift/settlement of structures. These ground-related disasters involve large deformations of the ground. To predict such large deformations and quantify ground safety, recently developed particle-based numerical methods that can handle large deformations are used. This chapter describes the discretization of the theoretical equations of porous media theory and geomaterial nonlinearity according to the Material Point Method framework. In order to verify the accuracy of the discretized equations and the implemented numerical simulator, two numerical calculations are performed. One is to obtain the static responses using Karl Terzaghi's one-dimensional consolidation theory and the other is to obtain the dynamic response using Simon's one-dimensional transient response method. The chapter explains the study of applicability to geomaterials in particular by investigating the rise and dissipation of excess pore water pressure in liquefied ground during earthquakes. |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2018-0-86959-9&isbn=9780429438660&doi=10.1201/9780429438660-26&format=pdf |
| Ending Page | 220 |
| Page Count | 6 |
| Starting Page | 215 |
| DOI | 10.1201/9780429438660-26 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Physical Modelling in Geotechnics Geological Engineering Model Porous Media Pore Lateral Spreading Numerical Simulator Material Point Method Media Theory |
| Content Type | Text |
| Resource Type | Chapter |
