Erratum for “Implementing the Extended Multivariate Approach in Design with Partial Factors for a Retaining Wall in Clay” by Anders Prästings, Johan Spross, Rasmus Müller, Stefan Larsson, William Bjureland, and Fredrik Johansson
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VIEW THE CORRECTED ARTICLEPublication: ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering
Volume 6, Issue 2
Several corrections should be made to the original paper. The errors include corrections to Eqs. (8) and (9). Furthermore, a mistake in the calculation of the uncertainty related to random measurement error, , requires corrections to Table 4 and to Figs. 7, 9, and 10. The corrections of the calculation results are inconsequential and do not alter the conclusions of the published paper. The corrections are given subsequently.
a | b | c | d | |||
---|---|---|---|---|---|---|
CPT | 96 | 0.072 | 0.011 | 0.03e/0.003 | 0.13 | Fig. 7 |
CRS | 53 | 0.066 | 0.017 | 0.043f/0.006 | 0.11 | Fig. 7 |
DSS | 41 | 0.066 | 0.017 | 0.043f/0.004 | — | Fig. 7 |
Prior | — | — | — | — | — | 0.20 |
a
See Müller et al. (2014), Eqs. (3a) and (6b).
b
See Müller et al. (2014), Eqs. (3b) and (6a). The is dependent on , and the given value is the average value from 5 to 35 m of depth.
c
Evaluated according to .
d
Evaluated with guidance from Phoon and Kulhawy (1999).
e
Evaluated from the ACF as 15% of the variability in performed measurements ( where ) (Fig. 6) according to Baecher (1983).
f
Assumed as 30% of the variability in performed measurements ( where ).
Corrections to Section “Project Description and Site Characterization” [Eqs. (8a), (8b), and (9)]
Corrections to Section “Evaluation of Uncertainty in the Mean Undrained Shear Strength” (Table 4)
An incorrect version of Table 4 was published. A mistake in the calculation of was found for which corrections are provided in the revised Table 4. The correct equation is (in footnote e) and (in footnote f). This causes subsequent errors in the estimation of the inherent (spatial) variability, , and the statistical uncertainty, , which were calculated according to Müller et al. (2014). In the corrected version of Table 4 both and are incorporated for clarification. Corrected values in the table are in bold.
Subsequent Corrections to Section “Uncertainty in the Mean Undrained Shear Strength Evaluated from the EMA” (Fig. 7)
Subsequent Corrections to Section “Characteristic Values” (Fig. 9)
The correction of requires a small subsequent modification of the mean value of the posterior uncertainty, into 0.054, and the evaluated conversion factor, , in Fig. 9. Thus, when varies between 1.0 and 0.6, ranges from 1.16 to 1.29.
Subsequent Corrections to Section “Design Values” (Fig. 10)
The correction of requires a subsequent modification of the evaluated flexible partial factor, , in Fig. 10. Thus, when varies between 1.0 and 0.6, ranges from 1.16 to 1.29.
References
Baecher, G. B. 1983. “Simplified geotechnical data analysis.” In Reliability theory and its application in structural and soil mechanics, edited by P. Thoft-Christensen, 257–277. Dordrecht, Netherlands: Springer.
Müller, R., S. Larsson, and J. Spross. 2014. “Extended multivariate approach for uncertainty reduction in the assessment of undrained shear strength in clays.” Can. Geotech. J. 51 (3): 231–245. https://doi.org/10.1139/cgj-2012-0176.
Phoon, K. K., and F. H. Kulhawy. 1999. “Evaluation of geotechnical property variability.” Can. Geotech. J. 36 (4): 625–639. https://doi.org/10.1139/t99-039.
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©2020 American Society of Civil Engineers.
History
Received: Aug 26, 2019
Accepted: Sep 24, 2019
Published online: Jan 20, 2020
Published in print: Jun 1, 2020
Discussion open until: Jun 20, 2020
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