E0-190-2008_(10)1D_Shear_Propagation(SHAKE)

The iteration of the computation is continued until

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Unformatted text preview: j. The iteration of the computation is continued until the stable values are attained. The famous computer program of the equivalent linear analysis procedure for the response of the soil strata is the program “SHAKE”. In the SHAKE, the equivalent shear strains γej for the each stratum are evaluated by: (70) There are many nonlinear models which express the relation between the shear strain γ and the shear modulus G, the damping factor h. Using the experimental test data on the soil specimens, the relations between γ and G/Go, h are regressed as: G/Go=1/(1+γ/γ0.5) h=hmax(1-G/Go) Where, Go=initial shear modulus, hmax and γ0.5 are given as followings. ・Clay and Silt : hmax=17% , γ0.5 =0.18% ・Sand and Gravel : hmax=21% , γ0.5 =0.10% 1.0 G/Go せ ん 断 剛 性 比 G /G 0 せ ん 断 剛 性 比 G/G0 1.0 G/Go 提 案 モ デル 0.5 告示モデル 試験結果 0.0 30 10 1 1 + γ / γ 0.5 告示モデル 試験結果 G / G0 = 減 衰 定 数 h(% ) 減 衰 定 数 h(%) h (%) 0.5 0.0 30 G / G0 = 20 提案モデル h = hmax (1 − G / G0 ) γ 0.5 = 0.18%   0.001 0.01 0.1 せ ん strain (%) Shear 断 ひ ず み γ( %) h = hmax (1 − G / G0 ) h (%) hmax = 17% 0 0.0001 20 1.0 (a) (a) Clay and Silt 粘性土 (粘土及びシルト) 5.0 1 1 + γ / γ 0.5 10 0 0.0001 γ 0.5 = 0.10% hmax = 21% 0.001 0.01 0.1 せ ん 断 strain (%) Shear ひ ず み γ( %) (b) 砂質土 (砂及び礫) (b) Sand and Gravel 1.0 5.0 Dynamic Soil Structure Interaction END One-Dimensional Shear Wave Propagation In Multi-Layered Strata (SHAKE) Kenji MIURA, Dr. Eng. Professor Graduate School of Engineering Hiroshima University...
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