The Experts below are selected from a list of 18597 Experts worldwide ranked by ideXlab platform

T. Nogami - One of the best experts on this subject based on the ideXlab platform.

  • an unequal order radial interpolation meshless method for biot s Consolidation Theory
    Computers and Geotechnics, 2007
    Co-Authors: W.d. Wang, Jian-guo Wang, Zhi-liang Wang, T. Nogami
    Abstract:

    Abstract Due to its second-order accuracy and unconditional stability, the Crank–Nicholson scheme is widely used to obtain numerical solutions of Biot’s Consolidation Theory. However, spurious oscillation may occur when interpolations have equal orders for displacement and pore water pressure. This spurious oscillation may substantially degrade numerical accuracy. In order to avoid or alleviate spurious oscillation and improve numerical accuracy, a radial point interpolation meshless technique is proposed, with a polynomial for displacement that is one-order higher than for pore pressure. Three examples are numerically investigated with this meshless technique: a typical Terzaghi Consolidation problem, a 2D Consolidation problem, and a multi-layer Consolidation problem. The numerical results are compared with the closed-form solution, the equal-order radial point interpolation method or FEM. The effects of the parameters of the current meshless method on spurious oscillation are studied. It is found that such an interpolation has consistent derivatives for both displacement and pore water pressure in an equilibrium equation. Spurious oscillation can thus be alleviated or even avoided, leading to high accuracy.

  • An unequal-order radial interpolation meshless method for Biot’s Consolidation Theory
    Computers and Geotechnics, 2007
    Co-Authors: W.d. Wang, Jian-guo Wang, Zhi-liang Wang, T. Nogami
    Abstract:

    Abstract Due to its second-order accuracy and unconditional stability, the Crank–Nicholson scheme is widely used to obtain numerical solutions of Biot’s Consolidation Theory. However, spurious oscillation may occur when interpolations have equal orders for displacement and pore water pressure. This spurious oscillation may substantially degrade numerical accuracy. In order to avoid or alleviate spurious oscillation and improve numerical accuracy, a radial point interpolation meshless technique is proposed, with a polynomial for displacement that is one-order higher than for pore pressure. Three examples are numerically investigated with this meshless technique: a typical Terzaghi Consolidation problem, a 2D Consolidation problem, and a multi-layer Consolidation problem. The numerical results are compared with the closed-form solution, the equal-order radial point interpolation method or FEM. The effects of the parameters of the current meshless method on spurious oscillation are studied. It is found that such an interpolation has consistent derivatives for both displacement and pore water pressure in an equilibrium equation. Spurious oscillation can thus be alleviated or even avoided, leading to high accuracy.

Masaaki Kiyama - One of the best experts on this subject based on the ideXlab platform.

  • Nonlinear Consolidation Theory for Nonhomogeneous Clay Layers and Its Application.
    Soils and Foundations, 1998
    Co-Authors: Masato Mikasa, Naotoshi Takada, Akihiko Oshima, Masaaki Kiyama
    Abstract:

    ABSTRACT The first author derived a generalized one-dimensional Consolidation Theory in 1961 involving strain that takes into account the changes in mv, k, Consolidation pressure and the depth of the clay layer (finite strain), during the Consolidation process, and the effect of the selfweight of clay. This Theory, however, applies only to clay layers with uniform Consolidation properties; it has limited applicability to clay layers in the field, which are usually composed of different soils. The Consolidation Theory was thus amended to account for the continuous change in Consolidation properties along the depth. The derivation of this Consolidation Theory is detailed, and two examples of application to thick alluvial clayey layers in the Osaka Port area together with comparisons with field observations are presented.

Shen Zhu-jiang - One of the best experts on this subject based on the ideXlab platform.

Cn Liu - One of the best experts on this subject based on the ideXlab platform.

  • Unsaturated Consolidation Theory for the prediction of long-term municipal solid waste landfill settlement 
    SAGE PUBLICATIONS LTD, 2020
    Co-Authors: Cn Liu
    Abstract:

    [[abstract]]The understanding of long-term landfill settlement is important for landfill design and rehabilitation. However, suitable models that can consider both the mechanical and bio-decomposition mechanisms in predicting the long-term landfill settlement are generally not available. In this paper, a model based on unsaturated Consolidation Theory and considering the biodegradation process is introduced to simulate the landfill settlement behaviour. The details of problem formulations and the derivation of the solution for the formulated differential equation of gas pressure are presented. A step-by-step analytical procedure employing this approach for estimating settlement is proposed. The proposed model can generally model the typical features of short-term and long-term behaviour. The proposed model also yields results that are comparable with the field measurements.[[note]]SC

Kuosheng Chen - One of the best experts on this subject based on the ideXlab platform.

  • unsaturated Consolidation Theory for the prediction of long term municipal solid waste landfill settlement
    Waste Management & Research, 2006
    Co-Authors: Rongher Chen, Kuosheng Chen
    Abstract:

    The understanding of long-term landfill settlement is important for landfill design and rehabilitation. However, suitable models that can consider both the mechanical and biodecomposition mechanisms in predicting the long-term landfill settlement are generally not available. In this paper, a model based on unsaturated Consolidation Theory and considering the biodegradation process is introduced to simulate the landfill settlement behaviour. The details of problem formulations and the derivation of the solution for the formulated differential equation of gas pressure are presented. A step-bystep analytical procedure employing this approach for estimating settlement is proposed. The proposed model can generally model the typical features of short-term and long-term behaviour. The proposed model also yields results that are comparable with the field measurements.