ABSTRACT
Offshore structures located in high seismic risk marine are vulnerable to being damaged by earthquake cyclic loading. The glass fiber reinforced polymer (GFRP) is widely used in offshore structure reinforcement and repairment. This study aims to analyze the GFRP reinforcement effect on tubular T-joints of offshore platforms under earthquake cyclic loads through numerical studies based on FE software ANSYS. The static ultimate bearing capacity of the strengthened T-joints was compared to that of un-strengthened. Then, the deformation response under different seismic damage and the ultimate bearing capacity of joints strengthened with different GFRP sheets under 0.7 damage level were studied. Eventually, parametric analysis was conducted. The results demonstrated that both the number of layers and orientation of the GFRP sheets have a significant effect on the reinforcement under earthquake load.
