Abstract
The partial factors format, which is one of the reliability design methods, needs to be applied to open-type wharfs on vertical steel pipe piles in harbor structures in order to perform performance checks. In this study, the serviceability limit states, repairability limit states and ultimate limit states for vertical steel pipe piles of an open-type wharf are defined, then partial factors of design formulae are provisionally calculated based on reliability theory. Twenty existing open-type wharves are used, and limit states for the ground bearing capacity and bending moment of the piles are examined. Considering the uncertainties of basic variables such as the lateral subgrade reaction coefficient, the yield stress of the steel pipe piles and the ground bearing capacities of pile tips and shaft friction, the reliability of existing structures that were designed using previous methods is evaluated using the advanced first-order second-moment method, and a set of partial factors is estimated based on the sensitivities of basic variables. Finally, the reliability index in the design section is calculated by the partial coefficient method, and the validity of the proposed technique is verified.
