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| 題 名 | 預力混凝土基樁承受軸向載重行為之分析=Analyses for Axially Loaded Behavior of Prestressed Concrete Piles |
|---|---|
| 作 者 | 許世宗; 林商裕; 洪正杰; | 書刊名 | 中國土木水利工程學刊 |
| 卷 期 | 19:1 2007.03[民96.03] |
| 頁 次 | 頁13-23 |
| 分類號 | 441.17 |
| 關鍵詞 | 打擊樁; 沉泥質砂土; 極限承載力; 數值分析; Driven piles; Silty sand; Ultimate capacity; Numerical analysis; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 為獲得完整的打擊樁荷重-沉陷曲線,本研究發展一套數值分析方法,模擬預力混凝土基樁貫入土層的過程,再分析此基樁於沉泥質砂土中承受軸向荷重之行為,並利用現場試驗結果來驗證數值分析之正確性。 研究結果顯示,基樁達尖峰荷重前,數值分析所得之荷重-沉陷曲線與現場試驗結果相近。壓力樁之總荷重、摩擦力和點承力並非同時發生,且點承力無明顯的尖峰值;點承力僅佔極限承載力的10%~20%。於尖峰荷重下,樁身周圍土壤之降伏範圍隨樁徑和相對密度之增加而擴大。位於樁頂周圍土壤位移的徑向分量朝向樁身,而樁底附近土壤位移的徑向分量則遠離樁身。 |
| 英文摘要 | To obtain complete load-settlement curves of driven piles, a numerical method was developed to simulate the processes during pile driving, and then to analyze the axially loaded behavior of the PC piles in silty sand. The calculated results are compared with the results of full scale pile load tests. It was found, that the load-settlement behaviors of piles calculated from present model were close to those measured from the field tests before the piles were stressed to peak load. The total load, shaft friction, and point bearing do not reach peak values at the same pile settlement. The point bearing steadily increases but no obvious peak value occurs. However, the point bearing contributes only 10~20% of the ultimate pile capacity. The yield soils surround a pile expands with expands with increasing relative density of silty sand and pile diameter. The radial parts of ground movements nearby the top of a pile tend to the shaft; nevertheless, those nearby the bottom of a pile move away the shaft. |
本系統中英文摘要資訊取自各篇刊載內容。