Abstract
In order to establish a rational method for upgrading the impact-resistant capacities of the reinforced concrete (RC) beams using Fiber Reinforced Polymer (FRP) sheet, consecutive drop-weight impact loading tests of the beams strengthened in flexure with an Aramid FRP (AFRP) sheet were carried out. In this study, the AFRP sheet having a density of 1660 g/m2 was bonded to the tension-side surface of the beams. RC beams used here have a rectangular cross section of 200 mm width, 250 mm depth, and 3 m clear span length. Impact load was applied by dropping a 300 kg steel weight from a predetermined height onto the mid-span of the beam consecutively. The height was increased in the order of 1, 2, 2.5, and 3 m up to the corresponding ultimate state of the beam. The results obtained from this study were as follows: (1) maximum and residual deflections can be decreased effectively by strengthening with AFRP sheet; (2) absolute maximum and residual deflections were linearly distributed corresponding to an accumulated input impact energy; and (3) the RC beams strengthened with AFRP sheet reached the ultimate state with the sheet debonding.
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Acknowledgements
This work was supported by JSPS KAKENHI Grant Number JP17K06527. AFRP sheet and adhesive were provided by Fibex, Co. Ltd. and Sumitomo Rubber Industries, Co. Ltd., respectively.
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Le Huy, S., Komuro, M., Kishi, N., Kawarai, T. (2021). Experimental Study on Dynamic Behaviors of Flexural Strengthened RC Beams with AFRP Sheet Having 1660 g/m2 Mass Under Consecutive Impact Loading. In: Wang, C.M., Dao, V., Kitipornchai, S. (eds) EASEC16. Lecture Notes in Civil Engineering, vol 101. Springer, Singapore. https://doi.org/10.1007/978-981-15-8079-6_81
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DOI: https://doi.org/10.1007/978-981-15-8079-6_81
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