Reinforcement Modeling of Building Beams Using Glass Fiber Reinforced Polymer (GFRP) Due to Building Function Changes in Jember

Abstract

One of effort to increase the space in the building is by adding a floor up. Additions to the upper floors can be done on limited land. However, the addition of the floor causes the ring balk function change becomes the floor beam function. Changing the function of the ring balk becomes floor beam makes the load received by the beam increase. The different types of dead loads and live loads received cause the beam reinforcement is needed. One of the reinforcement methods that can be done is by using Fiber Reinforced Polymer (FRP) material. The advantages of Fiber Reinforced Polymer (FRP) materials are lighter, have high tensile strength, not corrosion, easy to install, and easily formed. In this case, Glass Fiber Reinforced Polymer (GFRP) material is selected. This material is one type of FRP with cheaper price compared to other FRP types. Coating ring balk with GFRP aims to allow the ring balk as a floor beam function without having to destroy it as a whole. So, this case does not interfere with ongoing activities in that building. This study was conducted by modeling a 3 floors into 6 floors building with concrete roof using structure analysis program. The 35/40 ring balk will be function as a main beam on the 4th floor assuming a size of 45/60 with an additional beam of 40/50 to be able to withstand the load given. The results of the maximum moment (Mu = 20845.75 kgm) on the 4th floor main beam are a reference to determine the GFRP needed for reinforcement. Reinforcement is done by coating the beams with 1 mm of GFRP as much as 3 layers on 3 sides of the beam. Based on the analysis carried out it produces øMn (=21893.2861 kgm) > Mu (= 20845.75 kgm). Deflection which calculated composite is 3.63 mm.