Abstract
Owing to seismic, wave, or wind actions, tubular joints used in onshore and offshore civil infrastructures may require retrofitting to withstand both static and cyclic loadings. In the present study, bearing capacities, failure modes, and ductilities of damaged tubular T-joints retrofitted with carbon fiber reinforced polymer (CFRP) were investigated. Two-step loading was applied: first, a pre-determined load was applied to induce chord deformation; this was followed by unloading and CFRP retrofitting. Subsequently, the specimens were reloaded to failure. Results showed that the retrofitted specimens exhibited a maximum capacity similar to and a plastic deformation slightly larger than that of the bare specimen when these subjected to static loading; the retrofitted specimens, which were not severely damaged, exhibited a higher compressive ductility index than that of the bare specimen when these subjected to cyclic loading.
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Acknowledgements
This work was supported by the Shandong Provincial Science and Technology Plan Project [Grant No. J13LG05]. The experimental tests were conducted in the Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation at the Shandong University of Science and Technology. The support provided by the laboratory staff is gratefully acknowledged.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by PD, JG, YL and BY. The first draft of the manuscript was written by JG and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Deng, P., Guo, J., Liu, Y. et al. Damaged Tubular T-joints Retrofitted with Carbon Fiber Reinforced Polymer Subjected to Monotonic and Cyclic Loadings. Int J Steel Struct 21, 299–314 (2021). https://doi.org/10.1007/s13296-020-00439-w
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DOI: https://doi.org/10.1007/s13296-020-00439-w