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http://dx.doi.org/10.7843/kgs.2013.29.4.57

Resistance Factor Calculation of Driven Piles of Long Span Bridges  

Kim, Dong-Wook (Geotech. Research Eng. Div., KICT)
Park, Jae-Hyun (Geotech. Research Eng. Div., KICT)
Lee, Joon-Yong (Geotech. Research Eng. Div., KICT)
Kwak, Ki-Seok (Geotech. Research Eng. Div., KICT)
Publication Information
Journal of the Korean Geotechnical Society / v.29, no.4, 2013 , pp. 57-65 More about this Journal
Abstract
Assessment of uncertainties of loads and resistances is prerequisite for the development of load and resistance factor design (LRFD). Many previous studies related to resistance factor calculations of piles were conducted for short or medium span bridges (span lengths less than 200m) reflecting the live load uncertainty for ordinary span bridges. In this study, by using a revised live load model and its uncertainty for long span bridges (span lengths longer than 200m and shorter than 1500m), resistance factors are recalibrated. For the estimation of nominal pile capacity (both base and shaft capacities), the Imperial College Pile (ICP) design method is used. For clayey and sandy foundation, uncertainty of resistance is assessed based on the ICP database. As long span bridges are typically considered as more important structures than short or medium span bridges, higher target reliability indices are assigned in the reliability analysis. Finally, resistance factors are calculated and proposed for the use of LRFD of driven piles for ordinary span and long span bridges.
Keywords
Long span bridge; Driven pile; Target reliability index; Live load uncertainty; LRFD;
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Times Cited By KSCI : 1  (Citation Analysis)
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