Pengaruh Variasi Jarak Tulangan Sengkang Spiral Terhadap Kuat Lentur Balok Beton Bertulang

Abstract

In the development of this current technology, concrete is one of the building materials that is experiencing very rapid development in construction, one of which is beam construction. Reinforced concrete as a beam element must be given reinforcement in the form of flexural reinforcement that mounted horizontally and shear reinforcement that mounted vertically against the axis beam. This study aimed to determine the flexural strength of rectangular reinforced concrete beams by varying the spiral spacing of the concrete. This study aimed to determine the flexural strength of rectangular reinforced concrete beams by varying the spiral spacing of the concrete. Test objects used dimensional beam 15 × 15 × 60 cm with a total of 20 samples, each variation made from 5 samples. The variation in spiral spacing without reinforcement were 2,5 cm, 5 cm and 10 cm. Concrete quality plan used FC 30 MPa. Based on the analysis results noted that at a maximum flex load of 47.54 kN and maximum bending moment of 3.579 kNm, the maximum bending load of 37.8 kN and maximum bending moment of 2.849 kNm, and maximum bending moment of 33.26 kN and A maximum of flexible paces of 2.508 kNm for every variation in the distance of the spiral. Based on the hypothesis test using a regression analysis method, the equation obtained was Y = 3,749 -13, 213X. The variation in the spiral spacing of reinforced concrete beams had no significant effect. The crack pattern that occured on all test objects was generally a bending pattern and subjected to vertical cracks in the 1/3 portion of the beam's pull towards the area of press.