頁籤選單縮合
題 名 | 臺北盆地基二區沉泥質黏土之動態特性=Dynamic Characteristics of Silty Clay for K-Ⅱ Zone in the Taipei Basin |
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作 者 | 李崇正; 許曉峰; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 9:4 1997.12[民86.12] |
頁 次 | 頁549-560 |
分類號 | 441.12 |
關鍵詞 | 剪力模數; 動態強度; 阻尼比衰減; 顯著頻率; Shear modulus; Dynamic strength; Degradation of damping ratio; Predominant frequency; |
語 文 | 中文(Chinese) |
中文摘要 | 本文針對基二區沉泥質黏土,分別進行環境微震量測、下孔法剪力波速井測及動力三軸試驗。利用(Su)作為參考不排水剪力強度,建立G、動態強度與(Su)之關係。以R-O模式配合提出之參數及相關圖表,可求得剪力模數、阻尼比與剪應變及作用週期數之衰減關係。比較國內外不同塑性指數之黏土,發現低塑性黏土剪力模數及動態強度之衰減較快。本研究亦建立等向及K 壓密試體,動態強度衰減與附加剪應力大小、作用週期數之關係。另外由環境微震量測發現臺北盆地有兩個顯著頻率、一為盆地岩盤之顯著頻率,另一為松山層之顯著頻率且與松山層勁度有關。 |
英文摘要 | A series of in-situ tests and cyclic triaxial tests are performed to investigate the dynamic characteristics of silty clay. Relations are presented for both G and the dynamic shear strength to (Su). R-O model may well describe the relations of degradation of the shear modulus with increasing of the strain amplitude and the numbers of cycle. The relations of degradation of the dynamic strength are constructed. Both the shear modulus and the dynamic shear strenght of the low plasticity clay degrade more quickly than that of the high plasticity clay under the same cyclic loadings. The predominant frequencies of the rock base and the Sunshang formation are found from the microtremor measurements. |
本系統中英文摘要資訊取自各篇刊載內容。