Effects of tension and compression loads on the FRP wrapped steel tubes

Abstract

Steel tubes are the most applicable members in jacket types of offshore structures. Under many load conditions, deterioration may be occurred in lots of these elements, so rehabilitation and retrofitting of them is an important matter for service ability of these types of marine structures. In this study, strengthening of steel tubes with FRP laminates are investigated by numerical approach. Also, a parametric study is carried out on the tensile and compressive axial force of the tube and the effects of these parameters were investigated closely. For this purpose, the ABAQUS finite element software was used. In the finite element model, the monotonic loading of four-point bending with quasi-static method was applied. Results was shown that FRP laminates, will be improved the mechanical behavior of steel tubes such as strength and stiffness. In the analysis, the failure mode was in the load and support location.