Depth Adding of Reinforced Concrete Beam

Abstract

      At present, the building has been modified for the first time design purposes. Small buildings are frequently modified due to the change of owner, resulting in improvements to the building for purposes such as the increased of carry load of the building. Beams are structural parts that need to be improved to carry more weight, one improvement is to increase the depth of the beam. The researchers then studied the increased flexural capacity of a simple beam the beam by increasing the depth of beams. The compressive strength of a standard cylindrical concrete 222 kilograms per square centimeter were used for this research with a curing age 28 day. The 4 sample combinations have a depth of 0.28m, 0.33m, 0.38m and 0.43m. Each set has 3 examples. And reinforcing the bending force steel at the Effective depth normal beams, curing by soaking in water for 28 days then test for bending strength and deflection. It was found that all reinforced concrete beams received an increase in bending force compared to normal reinforced concrete beams with the same depth of effectiveness. It has an average of 3.53 times the theory by the Working Stress Design (WSD) and 1.47 times that of Strength Design Method theory (SDM).

Keywords: Effective depth, Bending behavior, Flexural steel reinforcement