Lamombi, Slamet L. (2024) Pengaruh Perkuatan Pengekangan Eksternal Pada Balok Beton Bertulang Yang Sudah Dibebani Menggunakan Carbon Fiber Reinforced Polymer (Cfrp) Terhadap Kuat Momen Lentur. Undergraduate thesis, Fakultas Teknik Universitas Merdeka Malang.

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Abstract

The use of carbon fiber reinforced polymer (CFRP) to strengthen damaged concrete beams can restore the strength, stiffness and stability of concrete structures. The aim of this research is to determine the effect of strengthening external restraints on reinforced concrete beams that have been loaded using carbon fiber reinforced polymer (CFRP) on bending moment strength. The research consisted of testing the bending moment strength of reinforced concrete beams using CFRP external restraint reinforcement. The test object is in the form of a block measuring 15 x 15 x 65 cm with concrete quality f'c 22.27 Mpa. Using variations in CFRP spacing and width. Each of the variations without CFRP spacing, 5 cm, 10 cm and CFRP widths 5 cm, 7 cm, and 9 cm, contained 3 test objects. The bending moment strength test was tested based on ASTM C78/C78 regarding standard test method for flexural strength of concrete (using simple beam with third-point loading). The research results show that the distance between spacing and the width of CFRP can increase the bending moment strength of concrete that has been loaded. The average bending moment strength of an unreinforced concrete beam is 4.60 kNm. The largest average bending moment strength was in the variation without spacing of CFRP worth 6.77 kNm and the variation in width of 9 cm CFRP worth 5.97 kNm compared to normal concrete beams (without reinforcement). Meanwhile, the 5 cm CFRP spacing variation is worth 6.70 kNm, 10 cm is worth 5.93 kNm and the 5 cm CFRP width variation is worth 5.43 kNm, 7 cm is worth 5.67 kNm.

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