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Compressive and flexural behaviour of CFRP-repaired concrete-filled steel tubes after exposure to fire |
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| Authors: | Zhong Tao Lin-Hai Han Ling-Ling Wang |
| Affiliation: | a College of Civil Engineering, Fuzhou University, Gongye Road 523, Fuzhou, Fujian Province, 350002, People’s Republic of China b Department of Civil Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China c Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua University, Beijing, 100084, People’s Republic of China |
| Abstract: | This paper presents the results of axial compression and bending tests of fire-damaged concrete-filled steel tubes (CFST) repaired using unidirectional carbon fibre reinforced polymer (CFRP) composites. Both circular and square specimens were tested to investigate the repair effects of CFRP composites on them. The test results showed that the CFRP jackets enhanced the load-bearing capacity of the stub columns effectively. Enhancement of the columns’ stiffness due to the CFRP jackets was also observed. However, for beams, the test results demonstrated that the repair effect was not as good when compared with that for stub columns. From the test results, it is recommended that other appropriate repair measures should be taken in repairing severely fire-damaged CFST beams, or those members subjected to comparatively large bending moments. |
| Keywords: | Composite columns Composite beams FRP Post-fire Residual strength Concrete-filled steel tubes Repairing |
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