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頁籤選單縮合
題名 | 應力控制反覆載重對飽和砂土動力特性之研究 |
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作者姓名(中文) | 蕭達鴻; | 書刊名 | 技術學刊 |
卷期 | 5:2 1990.06[民79.06] |
頁次 | 頁107-114 |
分類號 | 441.12 |
關鍵詞 | 應力控制; 反覆載重; 飽和砂土; 動力特性; |
語文 | 中文(Chinese) |
中文摘要 | 本文指出利用動力三軸試驗儀,進行不排水之動力三軸試驗以求得剪力模數G值,在剪應變γ大於10-4左右是可行的。試驗結果顯示(1)在固定之反覆次數下,相對密度及有效圍壓增加均使試體剪力模數G值相對增加。(2)施予較大反覆剪應力易使土壤發生初始液化,然較小反覆剪應力將使試體在反覆次數1000下時僅得有限之剩餘孔隙水壓力,上述三組試驗結果臨界值在相對密度或有效圍壓愈大時愈明顯。(3)當剪應變γ=10-4,所有試驗結果在反覆次數1000下時,其剩餘孔隙、水壓力均僅0.01 -0.02 kg/cm2。 |
英文摘要 | This paper presents the use of cyclic shear stress system, processed by the cyclic triaxial apparatus, to determine the shear modulus G when γ> 10-4. The test results show: (1) If the cyclic number is fIxed, the more Dγor effective confined pressure is added, the more G increases. (2) The sand is easier to get initial liquefaction while the more cyclic shear stress is chosen. On the contrary, we have limited residual pore water pressure under 1000 cyclic numbers with less cyclic shear stress. The critical stress between 2 test sets above will increase with the addition of Dγ and σ3c. (3) The residual pore water pressure becomes only 0.01 - 0.02 kg/cm2 under 1000 cyclic numbers when γ = 10-4 is applied in every specimen. |
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