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題 名 | 前期應力歷史對飽和砂土動力強度與剪力模數之影響 |
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作 者 | 蕭達鴻; | 書刊名 | 技術學刊 |
卷 期 | 3:2 1988.06[民77.06] |
頁 次 | 頁119-126 |
分類號 | 441.12 |
關鍵詞 | 前期應力歷史; 飽和砂土; 動力強度; 剪力模數; |
語 文 | 中文(Chinese) |
中文摘要 | 本文是利用反覆三軸試驗儀研究前期應力歷史對飽和砂動力特性之影響。一組試驗用於探討前期應力歷史對液化動力強度影響程度;另一組試驗旨在了解前期應力歷史與剪力模數G值之關係。試驗結果顧示:(1) 土壤結構,前期微震、過壓密比、初始壓密應力比和相對密度均對剪力模數有相當程度之影響;動力強度亦然。(2) 在所有討論參數中,動力強度與剪力模數試驗結果有一合理之共同趨勢。(3) 工程實用上,採非破壞性試驗求得剪力摸數,再利用其與動力強度二者之關係,取得動力強度結果應是一可行性方法。 |
英文摘要 | In this paper the cyclic triaxial test apparatus is used to study the influence of prestress history on the dynamic characteristics of saturated sand. Two sets of experiments are given. One is to research the influence of prestress history on the cyclic resistance of liquefaction; the other is to find out the relationship between prestress and shear modules G. The results: (1) Both the shear modulus and the cyclic resistance are directly affected by soil fabric, preseismic history, OCR, initial consolidation ratio and relative density. (2) In the field of selected parameters, a reasonable good correlation exists between the cyclic resistance and the shear modulus. (3) Practically, we can obtain the shear modulus by nondestructive test and get cyclic resistance by the relation between shear modulus and cyclic resistance. |
本系統中英文摘要資訊取自各篇刊載內容。