Estimating the flaw size in drilled shafts using an impulse response method

Sheng-Huoo Ni, Yan Hong Huang, Kuo Feng Lo, Jenq Jy Charng

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Flaws could occur in drilled shafts due to improper quality control, poor workmanship, and unexpected construction mistakes, and thus seriously decrease the loading capacity. This paper proposes a flaw size estimation formula for use in the impulse response test of drilled shafts. Numerical models were built to develop the estimation formula. The experimental cases also validate the estimation. The flaw depth ratio and stiffness ratio are two key parameters to accomplish the estimation. With the evaluation results of the formula, one can know the possible minimum flaw size in the drilled shaft and further remedial measures can be taken immediately. Furthermore, the detectable shaft slenderness ratio is shown to vary from 10 to 30, depending on the stiffness ratio.

Original languageEnglish
Pages (from-to)1197-1207
Number of pages11
JournalKSCE Journal of Civil Engineering
Volume15
Issue number7
DOIs
Publication statusPublished - 2011 Sep 1

Fingerprint

Impulse response
Defects
Stiffness
Quality control
Numerical models

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

Ni, Sheng-Huoo ; Huang, Yan Hong ; Lo, Kuo Feng ; Charng, Jenq Jy. / Estimating the flaw size in drilled shafts using an impulse response method. In: KSCE Journal of Civil Engineering. 2011 ; Vol. 15, No. 7. pp. 1197-1207.
@article{842647fd459a43eba599becf6c4ff223,
title = "Estimating the flaw size in drilled shafts using an impulse response method",
abstract = "Flaws could occur in drilled shafts due to improper quality control, poor workmanship, and unexpected construction mistakes, and thus seriously decrease the loading capacity. This paper proposes a flaw size estimation formula for use in the impulse response test of drilled shafts. Numerical models were built to develop the estimation formula. The experimental cases also validate the estimation. The flaw depth ratio and stiffness ratio are two key parameters to accomplish the estimation. With the evaluation results of the formula, one can know the possible minimum flaw size in the drilled shaft and further remedial measures can be taken immediately. Furthermore, the detectable shaft slenderness ratio is shown to vary from 10 to 30, depending on the stiffness ratio.",
author = "Sheng-Huoo Ni and Huang, {Yan Hong} and Lo, {Kuo Feng} and Charng, {Jenq Jy}",
year = "2011",
month = "9",
day = "1",
doi = "10.1007/s12205-011-0206-0",
language = "English",
volume = "15",
pages = "1197--1207",
journal = "KSCE Journal of Civil Engineering",
issn = "1226-7988",
publisher = "Korean Society of Civil Engineers",
number = "7",

}

Estimating the flaw size in drilled shafts using an impulse response method. / Ni, Sheng-Huoo; Huang, Yan Hong; Lo, Kuo Feng; Charng, Jenq Jy.

In: KSCE Journal of Civil Engineering, Vol. 15, No. 7, 01.09.2011, p. 1197-1207.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Estimating the flaw size in drilled shafts using an impulse response method

AU - Ni, Sheng-Huoo

AU - Huang, Yan Hong

AU - Lo, Kuo Feng

AU - Charng, Jenq Jy

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Flaws could occur in drilled shafts due to improper quality control, poor workmanship, and unexpected construction mistakes, and thus seriously decrease the loading capacity. This paper proposes a flaw size estimation formula for use in the impulse response test of drilled shafts. Numerical models were built to develop the estimation formula. The experimental cases also validate the estimation. The flaw depth ratio and stiffness ratio are two key parameters to accomplish the estimation. With the evaluation results of the formula, one can know the possible minimum flaw size in the drilled shaft and further remedial measures can be taken immediately. Furthermore, the detectable shaft slenderness ratio is shown to vary from 10 to 30, depending on the stiffness ratio.

AB - Flaws could occur in drilled shafts due to improper quality control, poor workmanship, and unexpected construction mistakes, and thus seriously decrease the loading capacity. This paper proposes a flaw size estimation formula for use in the impulse response test of drilled shafts. Numerical models were built to develop the estimation formula. The experimental cases also validate the estimation. The flaw depth ratio and stiffness ratio are two key parameters to accomplish the estimation. With the evaluation results of the formula, one can know the possible minimum flaw size in the drilled shaft and further remedial measures can be taken immediately. Furthermore, the detectable shaft slenderness ratio is shown to vary from 10 to 30, depending on the stiffness ratio.

UR - http://www.scopus.com/inward/record.url?scp=80052547430&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052547430&partnerID=8YFLogxK

U2 - 10.1007/s12205-011-0206-0

DO - 10.1007/s12205-011-0206-0

M3 - Article

VL - 15

SP - 1197

EP - 1207

JO - KSCE Journal of Civil Engineering

JF - KSCE Journal of Civil Engineering

SN - 1226-7988

IS - 7

ER -