Verification of macro-element method for vertical drains in dynamic problem

Toshihiro Nonaka, Shotaro Yamada

Research output: Contribution to conferencePaperpeer-review

Abstract

In the simulation of the vertical drain method using a soil-water couple finite element analysis, macro-element method can be used as an approximate method to introduce the water absorption and discharge functions of drains into individual elements. Although in most cases this method had been applied to quasi-static problems, the authors extend the function of the method and applied it to the soil-water coupled analysis code GEOASIA with an inertial term to evaluate the countermeasure effect of the pore water pressure dissipation method against liquefaction. In this paper, in order to verify the new macro-element method in dynamic problem under plane strain condition, the results of 2D analysis using the new macro-element method was compared with those of 3D analysis in which vertical drains were represented exactly by finely dividing finite element meshes. This paper presented that 2D analysis using the new macro-element method can approximate 3D analysis with fine mesh accurately in dynamic problem in terms of excess pore water pressure change and ground deformation.

Original languageEnglish
Pages2615-2618
Number of pages4
Publication statusPublished - 2017 Jan 1
Externally publishedYes
Event19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017 - Seoul, Korea, Republic of
Duration: 2017 Sep 172017 Sep 22

Other

Other19th International Conference on Soil Mechanics and Geotechnical Engineering, ICSMGE 2017
CountryKorea, Republic of
CitySeoul
Period17/9/1717/9/22

Keywords

  • Macro-element method
  • Pore water pressure dissipation method
  • Soil-water coupled analysis

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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