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Evaluation of WBUZPILE Design Methodology and the Development of a LRFD Driven Pile Resistance Factor Calibration for Alabama Soils

機(jī)譯：WBUZPILE設(shè)計(jì)方法論的評(píng)估以及LRFD驅(qū)動(dòng)的阿拉巴馬州土壤抗性因子標(biāo)定的發(fā)展

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摘要

In 2007, The American Association of State Highway and Transportation Officials required pile foundations to be designed using the Load Resistance Factored Design (LRFD) method. The Alabama Department of Transportation (ALDOT) utilizes the LRFD method, however the LRFD resistance factor used in ALDOT design is un-calibrated, and is not necessarily representative of Alabama soils. Additionally, the ALDOT pile design program (WBUZPILE) has not been verified as a reliable program for design. In this study, it was found that WBUZPILE tends to over-predict the ultimate capacity of concrete piles, and is more suitable for predicting the capacity of steel H-piles when compared to static load test data. A comparison was performed with the design program DRIVEN, and yielded similar results. A statistical analysis was performed on the results of WBUZPILE, and resistance factors were calibrated using Paikowsky's method. The calibration results show lower values when compared to the currently used resistance factor. A dynamic analysis was also performed in this study to quantify pile setup in the state of Alabama. The results show a greater increase in capacity between End of Drive (EOD) and Static Load Testing, when compared to the average capacity increase between EOD and Beginning of Re-strike. The greatest amount of pile setup was observed for piles driven in clay.
機(jī)譯：在2007年，美國(guó)國(guó)家公路和運(yùn)輸官員協(xié)會(huì)要求樁基必須使用抗荷載因素設(shè)計(jì)（LRFD）方法進(jìn)行設(shè)計(jì)。阿拉巴馬州運(yùn)輸部（ALDOT）使用LRFD方法，但是ALDOT設(shè)計(jì)中使用的LRFD抵抗因子未經(jīng)校準(zhǔn)，不一定代表阿拉巴馬州的土壤。此外，ALDOT樁設(shè)計(jì)程序（WBUZPILE）尚未被驗(yàn)證為可靠的設(shè)計(jì)程序。在這項(xiàng)研究中，發(fā)現(xiàn)WBUZPILE傾向于高估混凝土樁的極限承載力，并且與靜載荷試驗(yàn)數(shù)據(jù)相比，更適合于預(yù)測(cè)H形鋼樁的承載力。與設(shè)計(jì)程序DRIVEN進(jìn)行了比較，得出了相似的結(jié)果。對(duì)WBUZPILE的結(jié)果進(jìn)行統(tǒng)計(jì)分析，并使用Paikowsky方法校正抗性因子。與當(dāng)前使用的電阻系數(shù)相比，校準(zhǔn)結(jié)果顯示出較低的值。在這項(xiàng)研究中還進(jìn)行了動(dòng)態(tài)分析，以量化阿拉巴馬州的樁基設(shè)置。結(jié)果表明，與EOD和重新打擊開(kāi)始之間的平均容量增加相比，驅(qū)動(dòng)結(jié)束（EOD）和靜態(tài)負(fù)載測(cè)試之間的容量增加更大。對(duì)于在粘土中打樁的樁，觀察到最大的樁樁設(shè)置。

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  • 作者

    Pement, Benjamin John.;

  • 作者單位

    University of South Alabama.;

  • 授予單位 University of South Alabama.;
  • 學(xué)科 Engineering.
  • 學(xué)位 M.S.C.E.
  • 年度 2017
  • 頁(yè)碼 93 p.
  • 總頁(yè)數(shù) 93
  • 原文格式 PDF
  • 正文語(yǔ)種 eng
  • 中圖分類 藥物化學(xué);
  • 關(guān)鍵詞

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