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Ocean Systems Engineering   Volume 8, Number 4, December 2018, pages 409-426
Effect of FRP parameters in strengthening the tubular joint for offshore structures
P.S. Prashob, A.P. Shashikala and T.P. Somasundaran

Abstract     [Full Text]
    This paper presents the strengthening of tubular joint by wrapping Carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP). In this study, total number of layers, stacking sequence and length of wrapping are the different parameters involved when fiber reinforced polymers (FRP) composites are used for strengthening. For this, parameters where varied and results were compared with the reference joint. The best stacking sequence was identified which has the highest value in ultimate load with lesser deflections. For determining the best stacking sequence, numerical investigation was performed on CFRP composites; length of wrapping and number of layers were fixed. Later, the studies were focused on CFRP and GFRP strengthened joint by varying the total number of layers and length of wrapping. An attempt was done to propose a parametric equation from multiple regression analysis, which can be used for CFRP strengthened joints. Hashin failure criteria was used to check the failure of composites. Results revealed that FRP was having a greater influence in the load bearing capacity of joints, and in reducing the deflections and stresses of joint under axial compressive loads. It was also seen that, CFRP was far better than GFRP in reducing the stresses and deflection.
Key Words
    tubular joints; CFRP; GFRP; numerical investigation; Hashin failure; multiple regression
P.S. Prashob: Department of Mechanical Engineering, Mukesh Patel School of Technology Management and Engineering, NMIMS University, Mumbai - 400 056, India
A.P. Shashikala: Department of Civil Engineering, National Institute of Technology Calicut, Calicut - 673 601, India
T.P. Somasundaran: Department of Civil Engineering, Hindustan Institute of Technology and Science, Chennai - 603 103, India

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