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題 名 | 波浪引致海床液化潛能評估模式之探討=The Study of Evaluation Models of Seabed Liquefaction Induced by Wave |
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作 者 | 簡連貴; 張志新; | 書刊名 | 海洋工程學刊 |
卷 期 | 3:2 2004.02[民93.02] |
頁 次 | 頁75-96 |
分類號 | 443.1 |
關鍵詞 | 海床液化; 液化潛能評估; 反覆三軸試驗; 孔隙水壓; Seabed liquefaction; Liquefaction potential evaluation; Cyclic triaxial test system; Pore water pressure; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究收集國內外海床液化評估方法,包括Nataraja & Gill (1983)方法、Ihsihara & Yamazaki (1984)方法及陳與楊(1996)方法,探討各評估方法之特性,發現目前之海床液化評估方法並不能充分展現海床液化之特性,因此依據本研究論述之觀點,重新修正建立海床液化評估方法,並以雲林近岸海床砂土為研究對象,利用反覆三軸試驗系統,建立波浪作用下海床砂土液化阻抗強度,及孔隙水壓激發模式。研究結果顯示,海床砂土液化阻抗強度隨外力作用週期增加而增加,引起海床液化之反覆剪應力比有最低門檻值;海床砂土在波浪長時間的外力作用下,其孔隙水壓激發模式不同於地震短時間引致的孔隙水壓模式,最後本研究修正Seed et al.(1976)之孔隙水壓激發模式,並以新建立之評估方法分析雲林外海海床受波浪作用之液化潛能。 |
英文摘要 | In this study, three different evaluation models of seabed liquefaction induced by wave, such as Nataraja & Gill (1983), Ihsihara & Yamazaki (1984) and Chen & Yang (1996), were collected and discussed. The present evaluation models could not response completely on the behavior properties of seabed liquefaction. Therefore, based on the discussions in this study, the new evaluation method of seabed liquefaction induced by wave was remodified. Furthermore, the seabed liquefaction resistance strength and the excitation model of pore water pressure were established by a series cyclic triaxial test of seabed sand at west nearshore Taiwan. According to the experimental results, the liquefaction resistance of seabed sand would increase as wave period increased and existed with the threshold of cyclic stress ratio for seabed liquefaction. The behavior of pore water pressure of seabed sand under wave action was different from the one that earthquake induced. Thus, based on the excess pore pressure in this study and referenced the Seed’s model, the new model of pore water pressure was proposed. Meanwhile, by use of the remodified evaluation model, the wave induced seabed liquefaction potential at west nearshore Taiwan was evaluated. |
本系統中英文摘要資訊取自各篇刊載內容。