نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 دانشیار گروه مهندسی عمران دانشگاه زابل
2 دانشکده مهندسی عمران، دانشگاه زابل
3 استادیار، دانشکده مهندسی عمران، دانشگاه زابل
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
steel pipes are the commonly structures for transferring the oil and gas productions. Generally, the safe performances of these structures are reduced under the corrosion defects which are created on the pipes based experimental conditions or soil proprieties at reversibility time. in this paper, the corroded burst pressures of the mid-high grade steel pipes are computed using the nonlinear analysis by finite element models. the martial properties of steel are simulated using Ramberg-Osgood nonlinear model with three ultimate strains of 1%, 0.5% and 0.2%. the accuracy of the finite element models are compared with several empirical models and code design relations for 40-experimental data set for various types of corroded pipes as X60, X65, X80 and X100. root mean square error, correlation coefficient, agreement index and efficient factor are used to compare the performances of the models. it can be conducted that the finite element models are provided the accurate predictions for corroded burst pressure compared to the empirical models and the nonlinear martial proprieties with the yield strain of 0.2% is shown the best finite element results. in this FE model, the best comparative results for RMSE/MAS/R2 and d are receptively 329.1/113.1/0.912 and 0.813.
کلیدواژهها [English]
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