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題 名 | 以累積位移法分析自然邊坡在地震力作用下的曲面形破壞=Study on the Rotational Failure of Natural Slopes under Seismic Condition by Cumulative Displacement Method |
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作 者 | 溫郁菁; 陳時祖; | 書刊名 | 鑛冶 |
卷 期 | 48:3=187 2004.09[民93.09] |
頁 次 | 頁43-50 |
分類號 | 441.103 |
關鍵詞 | 累積位移量; 曲面形破壞; 位移係數; 擬靜力地震係數; Cumulative displacement method; Rotational slope failure; Displacement coefficient; Earthquake coefficient for pseudo-static method; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究乃以Newmark累積位移法探討自然邊坡在地震作用力下的曲面形破壞。首先對圓弧形滑動的臨界加速度相關特性進行分析,並將結果與對數螺旋形破壞相比較,而後再討論圓弧形滑動位移係數。此位移係數乘上水平方向位移量可得圓弧形動之位移量,而水平方向積分位移量可由地震紀錄積分或經驗式推求,曘後可藉此結果求取邊坡設計假設產生圓弧形動時可採取的擬靜力地震加速度值。分析結果發現,圓弧形破壞與對數螺旋形破壞臨界加速度值很接近,也即同一地點同一地震時,其他移量可由位移係數之差異判斷之,又圓弧形破壞之位移係數與邊坡傾角、摩擦角成反比與穩定數(c/γH)成正比。 |
英文摘要 | In this research, Newmark cumulative displacement method is used to evaluate the failure of rotational slope under seismic condition. First, the critical acceleration of the circular failure and log spiral failure have been studied and compared, and then the displacement coefficient of circular failure evaluated. The amount of displacement along the failure surface is the product of displacement coefficient and the amount of horizontal displacement of the failure surface, which can be obtained by empirical equations or by integration of the seismic record. Finally the coefficients of seismic force adapted by pseudo-static design have been evaluated for circular failure. In this study it is found that the critical accelerations of circular failure and log-spiral failure are very close for the same slope, however the displacement coefficients are different. The displacement coefficient of circular failure is inversely correlated to slope angle and the friction angle of slope material but is positive correlated to the stability facortor, c/γH |
本系統中英文摘要資訊取自各篇刊載內容。