Development of soil-water coupled NMM-DDA

R. Hashimoto, T. Koyama, M. Kikumoto

    Abstract

    In order to simulate the behavior of composite structures consisting of discontinuous blocks on the saturated ground, a soil-water coupled code based on NMM-DDA (coupled Numerical Manifold Method and Discontinuous Deformation Analysis) for saturated ground was newly developed. The code consists of three governing equations, the equation of motion for the DD A part, the equilibrium equation and the continuity equation for the NMM part. In the formulation, the first and the second equations were combined using the contact treatment with the penalty method similarly to the original NMM-DDA. Then, the equilibrium equation and the continuity equation for the NMM region was coupled with the effective stress concept based on u-p formulation. This coupling formulation enables the stability analysis of masonry structure on the saturated ground. As a verification of newly developed simulation code, one-dimensional consolidation analysis was carried out. The simulation results showed good agreement with the analytical solution of Terzaghi's consolidation equation, and the validity of the new code was confirmed.

    Original languageEnglish
    Title of host publication49th US Rock Mechanics / Geomechanics Symposium 2015
    PublisherAmerican Rock Mechanics Association (ARMA)
    Pages265-271
    Number of pages7
    Volume1
    ISBN (Electronic)9781510810518
    StatePublished - 2015
    Event49th US Rock Mechanics / Geomechanics Symposium - San Francisco, United States

    Other

    Other49th US Rock Mechanics / Geomechanics Symposium
    CountryUnited States
    CitySan Francisco
    Period15/6/2915/7/1

    Fingerprint

    numerical method
    consolidation
    soil water
    simulation
    masonry
    effective stress
    stability analysis

    ASJC Scopus subject areas

    • Geophysics
    • Geochemistry and Petrology

    Cite this

    Hashimoto, R., Koyama, T., & Kikumoto, M. (2015). Development of soil-water coupled NMM-DDA. In 49th US Rock Mechanics / Geomechanics Symposium 2015. (Vol. 1, pp. 265-271). American Rock Mechanics Association (ARMA).

    Development of soil-water coupled NMM-DDA. / Hashimoto, R.; Koyama, T.; Kikumoto, M.

    49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 1 American Rock Mechanics Association (ARMA), 2015. p. 265-271.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Hashimoto, R, Koyama, T & Kikumoto, M 2015, Development of soil-water coupled NMM-DDA. in 49th US Rock Mechanics / Geomechanics Symposium 2015. vol. 1, American Rock Mechanics Association (ARMA), pp. 265-271, 49th US Rock Mechanics / Geomechanics Symposium, San Francisco, United States, 29-1 July.
    Hashimoto R, Koyama T, Kikumoto M. Development of soil-water coupled NMM-DDA. In 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 1. American Rock Mechanics Association (ARMA). 2015. p. 265-271.

    Hashimoto, R.; Koyama, T.; Kikumoto, M. / Development of soil-water coupled NMM-DDA.

    49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 1 American Rock Mechanics Association (ARMA), 2015. p. 265-271.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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    N2 - In order to simulate the behavior of composite structures consisting of discontinuous blocks on the saturated ground, a soil-water coupled code based on NMM-DDA (coupled Numerical Manifold Method and Discontinuous Deformation Analysis) for saturated ground was newly developed. The code consists of three governing equations, the equation of motion for the DD A part, the equilibrium equation and the continuity equation for the NMM part. In the formulation, the first and the second equations were combined using the contact treatment with the penalty method similarly to the original NMM-DDA. Then, the equilibrium equation and the continuity equation for the NMM region was coupled with the effective stress concept based on u-p formulation. This coupling formulation enables the stability analysis of masonry structure on the saturated ground. As a verification of newly developed simulation code, one-dimensional consolidation analysis was carried out. The simulation results showed good agreement with the analytical solution of Terzaghi's consolidation equation, and the validity of the new code was confirmed.

    AB - In order to simulate the behavior of composite structures consisting of discontinuous blocks on the saturated ground, a soil-water coupled code based on NMM-DDA (coupled Numerical Manifold Method and Discontinuous Deformation Analysis) for saturated ground was newly developed. The code consists of three governing equations, the equation of motion for the DD A part, the equilibrium equation and the continuity equation for the NMM part. In the formulation, the first and the second equations were combined using the contact treatment with the penalty method similarly to the original NMM-DDA. Then, the equilibrium equation and the continuity equation for the NMM region was coupled with the effective stress concept based on u-p formulation. This coupling formulation enables the stability analysis of masonry structure on the saturated ground. As a verification of newly developed simulation code, one-dimensional consolidation analysis was carried out. The simulation results showed good agreement with the analytical solution of Terzaghi's consolidation equation, and the validity of the new code was confirmed.

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