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http://dx.doi.org/10.7843/kgs.2007.23.12.61

Reliability Estimation of Static Design Methods for Driven Steel Pipe Piles in Korea  

Huh, Jung-Won (Dept. of Civil and Environmental Engrg., Chonnam National Univ.)
Park, Jae-Hyun (Geotech. Engrg. Research Dept., KICT)
Kim, Kyung-Jun (Eastern Regional Geotech. North Carolina DOT)
Lee, Ju-Hyung (Geotech. Engrg. Research Dept., KICT)
Kwak, Ki-Seok (Geotech. Engrg. Research Dept., KICT)
Publication Information
Journal of the Korean Geotechnical Society / v.23, no.12, 2007 , pp. 61-73 More about this Journal
Abstract
As a part of Load and Resistance Factor Design(LRFD) code development in Korea, in this paper an intensive reliability analysis was performed to evaluate reliability levels of the two static bearing capacity methods for driven steel pipe piles adopted in Korean Standards for Structure Foundations by the representative reliability methods of First Order Reliability Method(FORM) and Monte Carlo Simulation(MCS). The resistance bias factors for the two static design methods were evaluated by comparing the representative measured bearing capacities with the design values. In determination of the representative bearing capacities of driven steel pipe piles, the 58 data sets of static load tests and soil property tests were collected and analyzed. The static bearing capacity formula and the Meyerhof method using N values were applied to the calculation of the expected design bearing capacity of the piles. The two representative reliability methods(FORM, MCS) based computer programs were developed to facilitate the reliability analysis in this study. Mean Value First Order Second Moment(MVFOSM) approach that provides a simple closed-form solution and two advanced methods of FORM and MCS were used to conduct the intensive reliability analysis using the resistance bias factor statistics obtained, and the results were then compared. In addition, a parametric study was conducted to identify the sensibility and the influence of the random variables on the reliability analysis under consideration.
Keywords
Driven steel pipe pile; FORM; LRFD; MCS; Reliability analysis;
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