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http://dx.doi.org/10.7843/kgs.2008.24.5.27

Characteristic Values of Design Parameters for Geotechnical Reliability Design  

Yoon, Gil-Lim (Coastal Harbor Engrg., Korea Ocean Research & Development Institute)
Yoon, Yeo-Won (Dept. of Civil Engrg., Inha Univ.)
Kim, Hong-Yeon (Coastal Harbor Engrg., Korea Ocean Research & Development Institute)
Publication Information
Journal of the Korean Geotechnical Society / v.24, no.5, 2008 , pp. 27-35 More about this Journal
Abstract
Geotechnical characteristic values for reliability-based design were analyzed using domestic marine clays. Analysis results indicate that there were close to mean values in oder of Student/Ovesen, Schneider and EN 1990's approach. However, it was found that the EN 1990's approach is inappropriate far estimating geotechnical characteristic value due to low reliability of estimation results. Four approaches had a trend of evaluating characteristic value conservatively with increasing of soil variability. Also, stability and settlement of breakwater subjected to nominal stress with unimproved soft grounds were computed to investigate the effects of estimated characteristic values. In case of using the Schneider's approach, the ratio of allowable bearing capacity/acting loads suggested 65% of that obtained from using the arithmetic mean approach, and showed underestimated value of 13.6% of the settlement obtained from the latter. The comparison of case designs using a representative value from arithmetic mean approach with the proposed approaches, using characteristic value showed that the former was mostly overestimated.
Keywords
Characteristic value; Eurocode 7; LRFD; Marine clay; Reliability-based design; Variability;
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