| 4 | Numerical analysis of straight and curved underground pipeline performance after rehabilitation by cured-in-place method显示文摘Underground pipelines are prone to damage by corrosion in Taiwan due to the humid climate and the aging and overuse of pipelines.No-dig technologies are necessary,as the cities in Taiwan are highly populated.Rehabilitation methods,including the cured-in-place pipe(CIPP)method,provide an alternative to the new no-dig installation methods,which are comparatively more expensive.In this study,the numerical analysis software ABAQUS was used to simulate straight-line and curved underground pipelines damaged by corrosion.After calibration by small-scale physical modeling in the laboratory,numerical models were applied to the analysis of the mechanical behavior of straight-line and curved underground pipelines.To analyze the performance of the CIPP rehabilitation method,different scenarios for straight-line and curved pipelines were considered.These included before-and after-rehabilitation,different internal pressures and surface loading conditions,and different liner deformabilities and pipe-liner interface strengths.The results suggest that the CIPP method can reinforce damaged pipes by reducing stress concentration and differential displacement near the corrosion void.However,proper liner thickness,liner material properties,and pipe-liner interface strength are essential for well-designed CIPP rehabilitation. | K.J.Shou C.C.Huang | 2020 | Underground Space2020，5，1： | 0 |
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