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http://dx.doi.org/10.7843/kgs.2019.35.11.97

Assessment of p-y Behaviors of a Cyclic Laterally Loaded Pile in Saturated Dense Silty Sand  

Baek, Sung-Ha (Korea Institute of Civil Engr. and Building Tech.)
Choi, Changho (Korea Institute of Civil Engr. and Building Tech.)
Cho, Jinwoo (Korea Institute of Civil Engr. and Building Tech.)
Chung, Choong-Ki (Dept. of Civil & Environmental Engrg., Seoul National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.35, no.11, 2019 , pp. 97-110 More about this Journal
Abstract
Piles that support offshore wind turbine structures are dominantly subjected to cyclic lateral loads of wind, waves, and tidal forces. For a successful design, it is imperative to investigate the behavior of the cyclic laterally loaded piles; the p-y curve method, in which the pile and soil are characterized as an elastic beam and nonlinear springs, respectively, has been typically utilized. In this study, model pile tests were performed in a 1 g gravitational field so as to investigate the p-y behaviors of cyclic laterally loaded piles installed in saturated dense silty sand. Test results showed that cyclic lateral loads gradually reduced the overall stiffness of the p-y curves (initial stiffness and ultimate soil reaction). This is because the cyclic lateral loads disturbed the surrounding soil, which led to the decrement of the soil resistance. The decrement effects of the overall stiffness of the p-y curves became more apparent as the magnitude of cyclic lateral load increased and approached the soil surface. From the test results, the cyclic p-y curve was developed using a p-y backbone curve method. Pseudo-static analysis was also performed with the developed cyclic p-y curve, confirming that it was able to properly predict the behaviors of cyclic laterally loaded pile installed in saturated dense silty sand.
Keywords
Cyclic lateral load; Dense silty sand; Model pile test; Offshore pile foundation; p-y curve;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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