Abstrak

Baca Juga : PENGGUNAAN NATURAL FIBER REINFORCED POLYMER (NFRP) BERBAHAN DASAR SERAT PISANG ABAKA UNTUK PERKUATAN GESER BALOK BETON BERTULANG (MUHAMMAD IQBAL, 2020) ,

Baca Juga : ANALISIS PERBANDINGAN KUAT LEKATAN MATERIAL KOMPOSIT FRP SERAT RAMI DAN SERAT ABAKA PADA PERKUATAN STRUKTUR BETON BERTULANG (SAPRIADIN, 2020) ,

umlah lapisan nfrp. metode perkuatan nfrp yang digunakan ialah dengan cara ditempelkan pada permukaan elemen struktur berbentuk strip secara fisik dengan bantuan perekat. benda uji yang digunakan ialah benda uji balok beton bertulang berukuran 15 cm x 30 cm x 220 cm yang berjumlah 3 benda uji yang diantaranya 1 benda uji sebagai balok kontrol dan 2 benda uji menggunakan perkuatan nfrp dengan variasi jumlah lapisannya. serat abaka yang digunakan berasal dari surakarta solo, yang di rajut oleh pengrajin tenun. berdasarkan hasil penelitian, penambahan atau perkuatan nfrp serat abaka pada balok bstv1 dapat meningkatkan beban maksimum sebesar 9,78% dari balok normal dan bstv2 sebesar 9,92% dari balok normal. kegagalan laminasi nfrp yang terjadi pada balok bstv1 yaitu 1 nfrp debonding failure dan 4 nfrp debonding failure pada balok bstv2. rendahnya peningkatan kapasitas kuat geser balok bstv2 diakibatkan kegagalan debonding (debonding failure) pada nfrp, sehingga nfrp serat abaka pada balok bstv2 tidak bekerja secara optimal. kata kunci: natural fiber reinforced polymer (nfrp), serat abaka, kuat geser,jumlah lapisan over time, the shear strength of reinforced concrete structures continues to decreased strength in structural performance due to several factors, as is the environment, natural hazards, and technical errors in construction so it requires increased capacity to withstand the load. one of the methods of shear reinforcement in reinforced concrete is to use fiber reinforced polymer (frp). the use of natural fibers as a natural fiber reinforced polymer (nfrp) material can be an alternative to shear reinforcement compared to glass fiber and carbon which is relatively expensive. natural fibers have good tensile strength, it is available in materials in nature especially in developing countries like indonesia, and the manufacturing process is environmentally friendly. some natural fibers that have been studied and explored to produce composite materials are abaca fibers. the purpose of this study is to evaluate the nfrp shear strength on reinforced concrete beams based on the nfrp number of layers. the nfrp reinforcement method used is by sticking it to the physical surface of a strip-shaped structural element with the aid of an adhesive. this study had 3 specimens with size of 150 x 300 x 2200 one of the specimens was control beam and the other two were strengthened beam with one and two layer of abaca nfrp. abaca fiber that is used comes from surakarta solo, which is knitted by artisans weaving. based on the results of the study, the addition or reinforcement of abaca fiber nfrp on bstv1 beams can increase the maximum load by 9.78% from normal beams and bstv2 by 9.92% from normal beams. nfrp lamination failures that occur are 1 nfrp debonding failure in bstv1 beams and 4 nfrp debonding failures in bstv2 beams. the low increase in bstv2 beam shear capacity is caused by the debonding failure in nfrp so that the nfrp of abaca fiber in the bstv2 beam does not work optimally. keywords: natural fiber reinforced polymer (nfrp), abaca fiber, shear strength, number of

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