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Student Number 943202031
Author Chih-Chun Kuo(郭致均)
Author's Email Address 943202031@cc.ncu.edu.tw
Statistics This thesis had been viewed 1576 times. Download 712 times.
Department Civil Engineering
Year 2007
Semester 1
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title The simulation of the pile behaviors on the compressive and the tensile pile head loading by centrifuge modeling tests
Date of Defense 2008-01-18
Page Count 146
Keyword
  • compressive pile
  • friction
  • model test
  • pile load test
  • sand
  • tensile pile
  • Abstract This study conducted a series of centrifuge model test to discuss the mechanism of the pile subjected to compressive and tensile loadings, and three different slender ratios of piles with the same embedded length were designed in the test. During the test, the model pile was first driven into the dry sand at 1g condition, and then an artificial gravity of 80g was applied in the centrifuge to simulate a full-scale prototype situation. Subsequently, two kinds of loading conditions were performed - monotonic loading and cyclic loading, and the differences of ultimate capacity, skin friction and end-bearing between the pile subjected to compressive and tensile loadings could be observed by measuring the axial force along the pile. From the results, the smaller the slender ratio, the smaller the skin friction ratio of tension to compression, the quantity of which ranges between 85 to 62% at ultimate state of monotonic loading. In cyclic loading test, the skin friction ratio of tension to compression gradually decreased from 52% to 46%. Besides, the pile skin friction in compressive condition is always larger than the one in tensile condition.
    Table of Content 中 文 摘 要.......................................I
    英 文 摘 要......................................II
    目 錄..........................................III
    表 目 錄..........................................V
    圖 目 錄.........................................VI
    第一章 緒論.......................................1
    1-1 研究動機與目的................................1
    1-2 研究方法與流程................................2
    1-3 論文架構......................................3
    第二章 文獻回顧...................................5
    2-1 現地基樁載重試驗..............................5
    2-2基樁承壓之行為與機制...........................7
    2-2-1受力機制.....................................7
    2-2-2承載力理論...................................8
    2-3基樁拉拔之行為與機制..........................15
    2-3-1受力機制....................................15
    2-3-2拉拔承載力理論..............................16
    2-4基樁與土壤之界面摩擦行為......................20
    2-4-1樁徑在摩擦行為之影響........................20
    2-4-2側向土壓力係數在摩擦行為之影響..............22
    2-5基樁承壓與抗拉之差異..........................23
    2-6離心機模型試驗原理............................31
    2-6-1離心模型之基本相似律........................31
    2-6-2離心模型試驗之模型模擬......................32
    2-6-3以離心模型試驗進行模型樁載重文獻研究........36
    第三章 離心機模型試驗............................40
    3-1試驗規劃與設計................................40
    3-2試驗土樣及其基本性質..........................40
    3-3試驗儀器設備..................................42
    3-4試驗方法與步驟................................57
    3-4-1試體製作....................................57
    3-4-2樁土界面直接剪力試驗........................60
    3-4-3模型基樁載重試驗............................63
    第四章 試驗結果與分析............................69
    4-1試驗分析與貫樁準備............................69
    4-2極限承壓試驗..................................73
    4-3極限拉拔試驗..................................88
    4-4綜合分析與討論................................97
    4-4循環工作載重試驗.............................110
    第五章 結論與建議...............................139
    5-1 結論........................................139
    5-2 建議........................................142
    參考文獻........................................143
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    Advisor
  • Chung-Jung Lee(李崇正)
  • Jin-Hung Hwang(黃俊鴻)
  • Files
  • 943202031.pdf
  • approve immediately
    Date of Submission 2008-01-28

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