Research on Buckling State of Prestressed Fiber-Strengthened Steel Pipes

5th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Wang, Ruheng^1 ; Lan, Kunchang^1

Southwest University of Science and Technology, Mianyang

621010, China^1

关键词: Approximation methods;    Consolidation techniques;    Deformation coordination;    Mechanical behavior;    Minimum potential energy principle;    Oil-and-Gas pipelines;    Rayleigh-Ritz methods;    Station-ary values;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/301/1/012078/pdf
DOI  :  10.1088/1757-899X/301/1/012078

来源: IOP

【 摘 要 】

The main restorative methods of damaged oil and gas pipelines include welding reinforcement, fixture reinforcement and fiber material reinforcement. Owing to the severe corrosion problems of pipes in practical use, the research on renovation and consolidation techniques of damaged pipes gains extensive attention by experts and scholars both at home and abroad. The analysis of mechanical behaviors of reinforced pressure pipelines and further studies focusing on "the critical buckling" and intensity of pressure pipeline failure are conducted in this paper, providing theoretical basis to restressed fiber-strengthened steel pipes. Deformation coordination equations and buckling control equations of steel pipes under the effect of prestress is deduced by using Rayleigh Ritz method, which is an approximation method based on potential energy stationary value theory and minimum potential energy principle. According to the deformation of prestressed steel pipes, the deflection differential equation of prestressed steel pipes is established, and the critical value of buckling under prestress is obtained.