000020172 001__ 20172
000020172 005__ 20170118182358.0
000020172 04107 $$aeng
000020172 046__ $$k2017-01-09
000020172 100__ $$aKondo, Akihiko
000020172 24500 $$aEffects of Grading Shape on Liquefaction Focusing Pore Structures and Percolation

000020172 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020172 260__ $$b
000020172 506__ $$arestricted
000020172 520__ $$2eng$$aWhen liquefaction occurs owing to seismic motion, erupted sand boils caused by increased excess pore water pressure are observed on the ground surface. Grain size analysis of these erupted sand points show very similar grain size distribution curves. In this study, we conducted model tests and numerical simulations to reveal this liquefaction mechanism considering the local permeability and pore structure. Based on the shaking table test using binary grading, it is confirmed that each maximum excess pore water pressure ratio shows agreement with its densest mixture content ratio, which content ratio also proportional to finer content ratio. This agreement for the liquefaction mechanism is evaluated by simulating the pore structure characteristics, such as void diameter and its continuity, using the discrete element method. The variation in the distribution of these indices shows good agreement with macroscopic permeability; it shows a proportional relation between the void size and its continuity. As for agreement with the experimental result, the pore structure indices show qualitatively good correspondence with excess pore water pressure rising content ratio. Based on the above quantitative agreements, the liquefaction potential according to various gradings is expressed by these interactions.

000020172 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020172 653__ $$aLiquefaction; Grading Shape; Pore Structure

000020172 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020172 720__ $$aKondo, Akihiko$$iKohama, Eiji
000020172 8560_ $$ffischerc@itam.cas.cz
000020172 8564_ $$s1455436$$uhttps://invenio.itam.cas.cz/record/20172/files/682.pdf$$yOriginal version of the author's contribution as presented on USB, paper 682.
000020172 962__ $$r16048
000020172 980__ $$aPAPER