Experimental and numerical study on CFRP-lined prestressed concrete cylinder pipe under internal pressure
| Autor: | Heng Zhang, He Hu, Tiesheng Dou, Fujun Niu, Wenji Su |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Carbon fiber reinforced polymer
Materials science business.industry 0211 other engineering and technologies Internal pressure 020101 civil engineering 02 engineering and technology Structural engineering engineering.material Finite element method 0201 civil engineering Cylinder (engine) law.invention Pipeline transport Prestressed concrete Coating law 021105 building & construction engineering Limit state design business Civil and Structural Engineering |
| Zdroj: | Engineering Structures. 190:480-492 |
| ISSN: | 0141-0296 |
| DOI: | 10.1016/j.engstruct.2019.03.106 |
| Popis: | Prestressed concrete cylinder pipe (PCCP) has been widely used for water conveyance projects. However, prestressing wire breaks may result in the rupture of a pipe and cause a serious catastrophe. Application of carbon fiber reinforced polymer (CFRP) liners adhered to the inner concrete core is an effective method of internal repairing and strengthening of PCCP. In this study, a full-scale experimental test and corresponding finite element model evaluation were conducted to investigate the structural performance of CFRP-lined PCCP. In particular, the complex CFRP-concrete bonded interface was simulated by a cohesive element layer with a bilinear traction-separation response. In addition, the failure risk analysis method was introduced to determine the required number of CFRP layers for the distressed PCCP. The experimental results showed that the watertightness of liner can be improved by painting polyurea coating on the surface of CFRP laminate. It was shown by the simulation that for each additional layer of CFRP, the threshold value for the design pressure increases by 7 broken wires under the damage limit state and by 20 broken wires for the working pressure. The research presented in this paper can provide technical recommendations for the application of CFRP-lined PCCP and help utilities to better strengthen the distressed PCCP pipelines. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect