Influence of bonding level on the bending fatigue behaviour of internal replacement pipe systems
Article
Kiriella, Shanika, Manalo, Allan, Tien, Cam M. T., Ahmadi, Hamid, Karunasena, Warna, Dixon, Patrick G., Salah, Ahmad and Wham, Brad P.. 2025. "Influence of bonding level on the bending fatigue behaviour of internal replacement pipe systems." Steel and Composite Structures: an international journal. 54 (2), pp. 175-190. https://doi.org/10.12989/scs.2025.54.2.175
| Article Title | Influence of bonding level on the bending fatigue behaviour of internal replacement pipe systems |
|---|---|
| ERA Journal ID | 4276 |
| Article Category | Article |
| Authors | Kiriella, Shanika, Manalo, Allan, Tien, Cam M. T., Ahmadi, Hamid, Karunasena, Warna, Dixon, Patrick G., Salah, Ahmad and Wham, Brad P. |
| Journal Title | Steel and Composite Structures: an international journal |
| Journal Citation | 54 (2), pp. 175-190 |
| Number of Pages | 16 |
| Year | 2025 |
| Publisher | Techno-Press |
| Place of Publication | Korea, Republic of |
| ISSN | 1229-9367 |
| 1598-6233 | |
| Digital Object Identifier (DOI) | https://doi.org/10.12989/scs.2025.54.2.175 |
| Web Address (URL) | https://koreascience.or.kr/article/JAKO202509843204390.page |
| Abstract | Internal replacement pipe (IRP) is a novel trenchless repair technology for rehabilitating legacy gas and oil pipelines. The current knowledge of the behaviour of IRP systems under repetitive traffic loading is limited due to insufficient research work. This study aimed to examine how the bonding level between the host pipe and IRP affects the flexural fatigue performance of IRP used for repairing legacy gas pipelines with circumferential discontinuities. The investigation was conducted using numerical four-point bending simulations under both pressurised and non-pressurised conditions. The influence of the thickness and material properties of IRP and the magnitude of traffic loads are also explored. The results of the analyses showed that the minimum fatigue life of all pressurised systems with any bonding level is primarily controlled by the tensile failure of the bottom outer surface of IRP. Based on a loading configuration of 762-1016-762 mm (30-40-30 in), it has been determined that unbonding 311.2 mm (12.3 in) diameter IRP from the host pipe to a length at least equal to the diameter of the IRP from the discontinuity edge provides the longest service life for non-pressurised repair systems. Similarly, for all pressurised systems, the longest fatigue life can be achieved by unbonding them to a length of at least twice the diameter of the IRP from the discontinuity edge. |
| Keywords | Finite element analysis (FEA); flexural fatigue behaviour; fully bonded; host pipes; internal pressure; Internal replacement pipe (IRP); stress concentratio; traffic loading; unbonded |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
| Public Notes | File reproduced in accordance with the copyright policy of the publisher/author/creator. |
| Byline Affiliations | Centre for Future Materials |
| Centre for Future Materials (Operations) | |
| University of Colorado Boulder, United States |
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