The Effect of Concrete Deformation on Displacement of an Axially Loaded Drilled Shaft

Dongwook Kim, Hobi Kim, Kyung Joon Shin, Hoyoung Seo

Research output: Contribution to journalArticle

Abstract

This article presents the settlement of drilled shafts resulting from their structural deformations. Although drilled shafts are widely used as foundations for settlement-sensitive structures such as bridges and high-rise buildings, the structural deformations of drilled shafts are not typically taken into account in the design process. However, if unexpected structural deformations of drilled shafts cause additional settlement to the foundation, the serviceability of the superstructure can be jeopardized. Unfortunately, very few research efforts have been made to quantify the structural deformation of drilled shafts; this needs to be addressed to accurately predict the settlement of drilled shafts. In this study, we investigate the effect of structural deformation on displacement of axially loaded drilled shafts. Finite element analyses were performed to quantify the structural deformation of drilled shafts. The analysis results indicated that the structural deformation of drilled shafts could be quite significant for long drilled shafts. The main factors that affected the structural deformation of drilled shafts were found to be pile length, the material properties of drilled shafts, and the relative humidity of surrounding soil. An approximate equation is proposed to estimate the long-term deformation of drilled shafts.

Original languageEnglish
Pages (from-to)116-126
Number of pages11
JournalMarine Georesources and Geotechnology
Volume34
Issue number2
DOIs
StatePublished - Feb 17 2016

Keywords

  • concrete creep
  • drilled shafts
  • finite element analysis
  • settlement
  • shrinkage
  • structural deformation

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