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題 名 | 模糊可能性理論評估砂性土壤液化潛能=Evaluation of Liquefaction Potential of Sand by Fuzzy Possibility Theory |
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作 者 | 葉吉芳; 張固宇; 梁明德; | 書刊名 | 模糊系統學刊 |
卷 期 | 4:1 1998.08[民87.08] |
頁 次 | 頁19-29 |
分類號 | 434.222 |
關鍵詞 | 液化潛能; 模糊可能性理論; 高階二次矩; Liquefaction potential; Fuzzy possibility theory; Advanced second order moment; |
語 文 | 英文(English) |
中文摘要 | 本文以 Seed and Idriss [1] 的簡化法為模糊可能性推理的基礎,同時考量砂性 土壤的基本動態參數及特性所建立的模糊關係,據以進行土壤液化潛能的評估。尤其是砂性 土壤在動態反覆荷重作用期間的液化行為非常複雜,為涵容這些不確定性及異常性,故以模 糊可能性的理論評估砂性土壤的液化潛能。文中以臺中港區及臺南永康為研究案例,先以傳 統機率理論計算出其相對的液化趨勢,再以模糊可能性理論進行推理,並以倒傳遞類神經網 路驗證可能性推理之收斂性及穩定性。研究結果顯示模糊可能性理論在砂性土壤液化潛能評 估上,確有其可靠性、可行性及優越性。而且傳統機率理論中因不同理論模式造成的差異性 ,在模糊可能性推理中就沒那麼大的差異。 |
英文摘要 | This paper describes some probabilistic analysis based on the simplified method suggested by Seed and Idriss[1] and used the fundamental theory of fuzzy possibility theory for evaluating the liquefaction potential of sand. The concept of fuzzy information expansion is introduced for smoothly modifying the membership function to the four liquefaction mechanism. The fuzzy possibility theory is evaluated the liquefaction potential of sands which belong to the area of Taichong harbor and Yong Kong village, Tainan. The analytic results are compared with the results obtained from the probabilistic evaluation of the advanced second order moment and Monte Carlo simulation. One gets a conclusion that the fuzzy approximate reasoning analysis can provide an accurate and objective evaluation of liquefaction potential of sand. |
本系統中英文摘要資訊取自各篇刊載內容。