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| 題 名 | 垂直錨版在鬆砂中阻抗力之行為=Ultimate Resistance of Vertical Anchor Plates in Loose Sand |
|---|---|
| 作 者 | 徐登文; 李連明; 陳建言; | 書刊名 | 中國土木水利工程學刊 |
| 卷 期 | 15:3 2003.09[民92.09] |
| 頁 次 | 頁447-456 |
| 分類號 | 441.13 |
| 關鍵詞 | 垂直錨版; 土壤阻抗力; 平面破壞; 對數螺旋破壞; 極限分析; Anchor plate; Soil resistance; Plane failure surface; Log-spiral failure surface; Limit analysis; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究是以不同寬高比之垂直錨版在不同埋入比下,探討在鬆砂中水平移動時所受土壤阻抗力之行為。淺層錨版在砂土埋入比小於2時,對數螺旋破壞及Murray和Geddes極限分析之理論值與量測值較為接近。當埋入比大於4以後平面破壞之預測值與Murray和Geddes極限分析之上限解相較於量測值其間之差異仍隨埋入比之增加而持續增大,對數螺旋破壞理論預測值與實驗值最為相近,至於深層埋設錨版預測值則根據錨版在砂土實際破壞面形狀及極限分析理論予以修正而與量測值一致。當錨版寬高比超過8時,其無因次極限土壤阻抗力Nq 已接近定值,顯示其已接近無限長條形錨版之行為。粗糙表面之錨版相對光滑表面之錨版其阻抗力略有5%增加,此乃錨版粗糙面和砂土間摩擦角較光滑面為大,需具有較大阻抗力去平衡粗糙錨版在砂土移動時於界面摩擦間所產生之能量。 |
| 英文摘要 | This study presents the ultimate soil resistance of vertical anchor plate horizontal pullout in the loose sand. The findings indicate that the analysis with the log-spiral failure surface and the upper bound limit theorem are more closed with the experimental results for the shallow buried plates with the depth ratio less than 2. However, the predictions with the log-spiral failure surface are more consistently with the measured values for the buried depth ratio up to 4 comparing with the other two failure modes. For the deeply buried plates, the modified limit theorem was developed using the slip lines of logarithmic spiral extending to the vertical line through the top of the anchor observed in the experiments, and the predictions were in good agreement with the measured results. Besides, the experimental results showed that the anchor plates with width-height ratio greater than 8 could be regarded as strip anchors. Anchors with the surface roughness had higher soil resistance due to the greater interfacial friction between the anchor and the sand, which may need the greater pullout capacity to balance the energy developed in the soil-anchor interface. |
本系統中英文摘要資訊取自各篇刊載內容。