Integrated design model for dynamic uplift behavior of suction anchor
Integrated design model for dynamic uplift behavior of suction anchor
Suction anchors are widely employed in marine engineering, serving as support foundation for fixed or floating structures. Throughout the operational lifespan, they are subjected to the consistent cyclic loading as well as the formidable challenge of extreme storms. This study introduces an integrated design model to estimate the dynamic uplift behavior of suction anchor under long-term cyclic loading and transient impact loading. It features a mass module for inertia, t-z spring for skirt friction, spring-damper for seepage, and a novel mechanism comprising a reverse end bearing spring and a soil plug slider to decouple the anchors overall vertical stiffness. Research reveals that the high-amplitude, low-frequency cyclic uplift loading markedly raises the failure risk of anchor in the permeable seabed. Previous cyclic loading exacerbates interface strength degradation, causing noteworthy development of vertical displacement and larger proportion of inertia force during the subsequent impact loading process. It is recommended for the properly consideration of anchor inertia under high-intensity impact loading to optimize the structural design.
Mengtao Xu; Wenjie Zhou; Shihong Zhang; Shengjie Rui; Zhen Guo
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
11 - Suction installed foundations and anchors
https://doi.org/10.53243/ISFOG2025-35
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