Stress Concentration Factors of T Tubular Joints Reinforced with Doubler Plates(Mechanics, Strength & Structure Design)

概要

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Tubular joints of offshore structures may be reinforced with doubler plates to enhance their punching shear strength. However, this may have negative effects when the joint is subjected to axial tension or bending. In this paper, a stress analysis of welded tubular T joints, strengthened with doubler plates and subjected to axial compression, axial tension, in plane and out-of-plane bending is conducted by using the finite element method. The study shows that the reinforced tubular joints are effectively strengthened only when they are subjected to axial compression. The joints perform as well as the corresponding unreinforced joints in withstanding axial tension and bending provided certain criteria for selecting the doubler plates are employed. The effects of the size of the doubler plates used for reinforcement are also studied and the results indicate that the size of the plates does not have significant effects on the SCF of the reinforced joints.
大阪大学の論文