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Effects of Geometric Design on Early-Age Thermal Behavior of Drilled Shaft.

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Title: Effects of Geometric Design on Early-Age Thermal Behavior of Drilled Shaft.
Authors: Sangyoung Han1, Lawrence, Adrian M.1, Mang Tia1, Bergin, Michael2
Source: Journal of Testing & Evaluation. Jul2019, Vol. 47 Issue 4, p2630-2648. 19p.
Abstract: This article presents an investigation on the early-age thermal behavior of drilled shafts with different geometric dimensions through numerical analysis. Finite-element models by using DIANA software were developed to analyze the thermal behavior of drilled shafts. In order to validate the finite-element model, four concrete drilled shafts were constructed and evaluated under Florida conditions for monitoring their actual thermal behavior. The calculated temperatures from the analytical model matched well with the measured values from the constructed shafts. All the drilled shafts with a diameter greater than 1.83 m (6 ft) produced a high maximum temperature and a maximum temperature differential which failed the allowable temperature set by the American Concrete Institute and the Florida Department of Transportation to prevent thermal cracking. Also, it was found that the dimension of the drilled shaft had the greatest influence on the maximum temperature inside a shaft. Analysis was performed to investigate whether the use of drilled shafts with a centroid void in the shaft could reduce the maximum temperature and maximum temperature differential. The results indicated that this is a viable alternate shaft design for controlling the maximum temperature and maximum temperature differential in concrete drilled shafts at an early age. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Testing & Evaluation is the property of ASTM International and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 137448915
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  Data: Effects of Geometric Design on Early-Age Thermal Behavior of Drilled Shaft.
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  Data: <searchLink fieldCode="AR" term="%22Sangyoung+Han%22">Sangyoung Han</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Lawrence%2C+Adrian+M%2E%22">Lawrence, Adrian M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mang+Tia%22">Mang Tia</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bergin%2C+Michael%22">Bergin, Michael</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Testing+%26+Evaluation%22">Journal of Testing & Evaluation</searchLink>. Jul2019, Vol. 47 Issue 4, p2630-2648. 19p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This article presents an investigation on the early-age thermal behavior of drilled shafts with different geometric dimensions through numerical analysis. Finite-element models by using DIANA software were developed to analyze the thermal behavior of drilled shafts. In order to validate the finite-element model, four concrete drilled shafts were constructed and evaluated under Florida conditions for monitoring their actual thermal behavior. The calculated temperatures from the analytical model matched well with the measured values from the constructed shafts. All the drilled shafts with a diameter greater than 1.83 m (6 ft) produced a high maximum temperature and a maximum temperature differential which failed the allowable temperature set by the American Concrete Institute and the Florida Department of Transportation to prevent thermal cracking. Also, it was found that the dimension of the drilled shaft had the greatest influence on the maximum temperature inside a shaft. Analysis was performed to investigate whether the use of drilled shafts with a centroid void in the shaft could reduce the maximum temperature and maximum temperature differential. The results indicated that this is a viable alternate shaft design for controlling the maximum temperature and maximum temperature differential in concrete drilled shafts at an early age. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Testing & Evaluation is the property of ASTM International and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1520/JTE20170090
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      – Code: eng
        Text: English
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        PageCount: 19
        StartPage: 2630
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      – TitleFull: Effects of Geometric Design on Early-Age Thermal Behavior of Drilled Shaft.
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            NameFull: Sangyoung Han
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            NameFull: Lawrence, Adrian M.
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            NameFull: Mang Tia
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            NameFull: Bergin, Michael
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            – D: 01
              M: 07
              Text: Jul2019
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              Y: 2019
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              Value: 47
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            – TitleFull: Journal of Testing & Evaluation
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