腐蚀作用下多龄期铸铁管线剩余强度分析

Analysis on residual strength of multi-age cast iron pipeline under the corrosion

基于铸铁管线的强度衰退机理,选取幂函数模型用以评价管线的剩余强度。综合分析管线在轴向缺陷和环向缺陷下的剩余强度变化情况,构建两种情况下的强度计算模型。针对兖州市城区铸铁管网的具体情况,对轴向缺陷和环向缺陷下的极限承载力进行计算分析。

Based on the strength＇s recession mechanism of cast iron pipelines, the power function model is selected to evaluate the residual strength. The residual strength change under the defects in the axial and circumferential is analyzed, and a computing model is established. According to the specific circumstances of cast iron pipelines in Yanzhou city, the ultimate bearing capacity under the defects in the axial and circumferential is calculated.