Abstract
Fiber-reinforced polymer (FRP) has been widely used for retrofitting concrete structure and in new constructions in the form of concrete filled FRP tube (CFFT). There are many researches related to the behavior of CFFT columns under different types of loading that prove the practical, durable, and significant advances of these composites. However, there is no efficient connection method of CFFT with other members, which has impeded the widespread application of the system in frame structures. This study proposed a blind bolted sleeve connection between CFFT column and steel beam and then investigated its seismic performance using finite-element (FE) approach. The FE model was validated by reproducing the experimental tests available in literature. Then an extensive parametric study was performed on the component, load, and material-related parameters that affect the structural behavior of the composite connection. From the results it was observed that an increase in diameter of blind bolt from M12 to M20, pretension load from 0.25Po to Po, grade of blind bolt from 8.8 to 10.9, and endplate thickness from 12 to 24 mm improved the moment capacity of flush endplate specimen by 116.8%, 155.6%, 6.3%, and 66.3%, respectively. However, the effects of column related parameters, such as in-filled concrete grade, amount of longitudinal reinforcement, and axial load level was negligible.
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Acknowledgements
The authors thank the Department of Mining Engineering at the Addis Ababa Science and Technology University, especially, Dr. Indalu and Mr. Mayebet for providing the opportunity to use their department supercomputers throughout the study period.
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The authors would like to acknowledge Addis Ababa Science and Technology University for partially funding this research.
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Menge, B.Y., Aure, T.W. Seismic performance evaluation of steel beam to concrete confined with FRP tube column connections. Asian J Civ Eng 23, 665–693 (2022). https://doi.org/10.1007/s42107-022-00448-6
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DOI: https://doi.org/10.1007/s42107-022-00448-6