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http://dx.doi.org/10.7781/kjoss.2017.29.6.401

Dynamic Instability of Submerged Floating Tunnels due to Tendon Slack  

Won, Deok Hee (Coastal Disaster Prevention Research Center, Korea Institute of Ocean Science and Technology)
Kim, Seungjun (Dept. of Construction Safety and Disaster Prevention Engineering, Daejeon University)
Publication Information
Journal of Korean Society of Steel Construction / v.29, no.6, 2017 , pp. 401-410 More about this Journal
Abstract
This study deals with dynamic instability of a tendon moored submerged floating tunnel (SFT) due to tendon slack. In general, environmental loadings such as wave and current govern SFT design. Especially, the wave force, whose amplitude and direction continuously change, directly induces the dynamic behavior of the SFT. The motion of the floating tube, induced by the wave force, leads dynamic response of the attached tendons and the dynamic change of internal forces of the tendons significantly affects to the fatigue design as well as the structural strength design. When the severe motion of the SFT occurs due to significant waves, tendons might lose their tension and slack so that the floating tube can be transiently instable. In this study, the characteristics of dynamic instability of the SFT due to tendon slack are investigated performing hydrodynamic analysis. In addition, the effects of draft, buoyancy-weight ratio, and tendon inclination on tendon slack and dynamic instability behavior are analytically investigated.
Keywords
Submerged floating tunnel; Mooring; Tendon; Hydrodynamic analysis; Dynamic instability;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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