Effect of internal pressure on the flexural fatigue behaviour of trenchless internal replacement pipe systems
Article
| Article Title | Effect of internal pressure on the flexural fatigue behaviour of trenchless internal replacement pipe systems |
|---|---|
| ERA Journal ID | 4304 |
| Article Category | Article |
| Authors | Kiriella, Shanika, Manalo, Allan, Tien, Cam Minh Tri, Ahmadi, Hamid, Karunasena, Warna, Dixon, Patrick G., Salah, Ahmad and Wham, Brad P. |
| Journal Title | Tunnelling and Underground Space Technology |
| Journal Citation | 154 |
| Article Number | 106111 |
| Number of Pages | 23 |
| Year | 2024 |
| Publisher | Elsevier |
| Place of Publication | United Kingdom |
| ISSN | 0886-7798 |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.tust.2024.106111 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0886779824005297 |
| Abstract | Internal replacement pipe (IRP) systems are a novel trenchless technique that is gaining interest in the rehabilitation of damaged legacy pipelines distributing natural gas. Performance evaluation of IRP systems under repetitive loads transmitted from vehicular traffic is essential to ensure their optimal and safe design. This study conducted numerical simulations to examine the impact of internal pressure on the bending fatigue behaviour of IRP systems that are fully bonded to legacy gas pipes with circumferential discontinuities. Other design parameters include the thickness and modulus of elasticity of IRP and the level of transmitted traffic load. The findings indicate that the operating internal pressure has a greater impact on the longitudinal stresses than the circumferential stresses of IRP when subjected to cyclic bending. The level of internal pressure changes the failure behaviour of IRP under fatigue. Based on the results obtained from extensive parametric simulations, mathematical expressions were formulated to predict the fatigue life of the IRP systems. Contour plots were generated to represent fatigue life response for different combinations of internal pressure levels and transmitted traffic loads. |
| Keywords | Trenchless technology; Gas pipelines; Internal replacement pipe (IRP); Repetitive load transmitted from vehicular traffic; Internal pressure; Flexural fatigue; Finite element analysis (FEA) |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 400510. Structural engineering |
| Byline Affiliations | Centre for Future Materials |
| University of Colorado Boulder, United States |
https://research.usq.edu.au/item/zv071/effect-of-internal-pressure-on-the-flexural-fatigue-behaviour-of-trenchless-internal-replacement-pipe-systems
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