Investigation of Bending Behavior in FRP-Reinforced CHS X-Connections

In marine engineering, specifically regarding offshore jacket constructions, the stress experienced by tubular joints' chord thickness emerges from both bending and membrane stresses. The Degree of Bending, defined as the ratio of bending stress to total stress, is important in evaluating the fatigue resistance of these structural joints. This research explores the Degree of Bending of tubular X-connections with diverse fiber-reinforced polymers (FRPs) under axial load. ۱۱۶ FE simulations were created to evaluate the impacts of FRP attributes alongside the joints' non-dimensional geometric parameters on the Degree of Bending. In the FE models, the Solid, Shell, and Contact elements were used for modeling the joints. The outcomes suggest a marked reduction in both membrane and bending stresses due to FRP application. Furthermore, elevations in both the Longitudinal Young's modulus of FRP and the quantity of FRP sheets significantly improve resistance of fatigue. The findings reveal that the stress intensity factor is decreased by ۸۳.۹% compared to the equivalent un-reinforced joint.

کلیدواژه ها:

Degree of bending ، Tubular joint ، Fiber-reinforced polymer ، Parametric study