Shear Performance of Fire-Damaged Reinforced Concrete Beams Repaired by a Bolted Side-Plating Technique
Publication: Journal of Structural Engineering
Volume 143, Issue 5
Abstract
The aim of this paper is to study the shear performance of fire-damaged reinforced concrete (RC) beams repaired by the bolted side-plating (BSP) technique. A total of six RC beams were fabricated and five were exposed to fire in accordance with standard temperature curves. Then the damaged beams were retrofitted with the BSP technique and four-point bending shear tests were conducted. The development of the temperature and deformation of RC beams under fire, the failure mode, the shear capacity and deformability, and the relative slips between the bolted steel plates and the RC beams were investigated. The displacement and strain fields were also obtained using the digital image correlation (DIC) technique. The testing results indicated that the shear capacity, stiffness, and ductility of the damaged RC beams were recovered after they were repaired by the BSP technique. The strengthening effect increases as the plate depth increases and the bolt spacing decreases. Relative longitudinal and transverse slips between the two structural components of the BSP beams were observed, and the number of anchor bolts exerted crucial influence on the degree of partial interaction between the bolted steel plates and the RC beams.
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Acknowledgments
The research described here received financial support from the National Natural Science Foundation of China (Project Nos. 51378397 and 51408436).
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Published In
Journal of Structural Engineering
Volume 143 • Issue 5 • May 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Feb 9, 2016
Accepted: Oct 17, 2016
Published ahead of print: Jan 26, 2017
Published online: Jan 27, 2017
Published in print: May 1, 2017
Discussion open until: Jun 27, 2017
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