Buckling Resistance of Line Pipes with Girth Weld Evaluated by New Computational Simulation and Experimental Technology for Full-Scale Pipes

This paper deals with the buckling behavior of UOE pipes under a bending moment. Full-scale bending tests were performed to evaluate the compressive strain limit (epsilon(Limit)). During the numerical simulation, the pipe was modeled using the measured pipe profile and the material constitutive law newly developed to analyze the orthogonal anisotropy. The test results verified that epsilon(Limit) was not degraded by aging during the anti-corrosion coating, although it declined for pipes with girth welds. The results obtained from the validated models suggest that the conventional method using the isotropic work hardening law may overestimate epsilon(Limit) under high internal pressure.