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Advances in Materials Science and Engineering - Volume 2015 2015, Article ID 564876, 11 pages -

Research ArticleDepartment of Civil Engineering, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, Chungbuk 362-763, Republic of Korea

Received 28 April 2015; Accepted 8 June 2015

Academic Editor: Ana S. Guimarães

Copyright © 2015 Kyusan Jung et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The effectiveness of a hybrid fiber reinforced polymer- FRP- fabric reinforced cementitious matrix FRCM for shear strengthening was investigated though an experimental study. FRP materials of FRCM are usually fabricated in the form of a fabric to enhance the bond strength between the FRP material and the cementitious matrix. The hybrid FRP fabric used in this study consisted of carbon FRP CFRP and glass FRP GFRP in warp and weft directions, respectively. A total of 11 beams were fabricated and 8 beams among them were strengthened in shear with externally bonded hybrid FRP-FRCM. The number of plies, the bond types, and the spacing of the hybrid FRP fabric were considered as experimental variables. Additionally, a shear capacity model for a FRCM shear strengthened beam was proposed. The values predicted by the proposed model were compared with those by the ACI 549 code and test results. It was confirmed from the comparison that the proposed model predicted the shear strengthening performance of the hybrid FRP-FRCM more reliably than the ACI 549 code did.





Autor: Kyusan Jung, Kinam Hong, Sanghoon Han, Jaekyu Park, and Jaehyun Kim

Fuente: https://www.hindawi.com/



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