As well known, the water pipeline is one of the most important lifelines, any accident of the water pipe will seriously affect our urban life. When the water pipelines constructed in deep underground, the buckling of water pipes under external pressure is considered for existing high ground water pressure. To prevent such buckling, it is necessary to study the buckling behavior, buckling design method and the enhancement measures of water pipe.
In this paper, the bucklingbehavior of the steel pipe with ring-stiffeners is studied by numerical analysisusing FEM codes. The results of the conventional analytical method is compared with that of numerical analysis and the more rational buckling design method and the reinforcement of steel water pipe is discussed.