Pengaruh Penggunaan Fiber Reinforced Polymer (Frp) terhadap Kuat Lentur Kayu

Abstract

Wood is a construction material commonly found in nature and has been used since the early history of humanity as a fundamental material in construction. However, the use of wood has gradually declined with the emergence of alternative materials such as concrete and steel. Some historical buildings in Indonesia, especially remnants from the Dutch East Indies, utilize wood and are considered cultural heritage by UNESCO. The city of Medan has several heritage buildings that still use wood, requiring conservation efforts to preserve their characteristics. Structural reinforcement, especially using Fiber Reinforced Polymer (FRP), becomes a solution to prevent damage and strengthen wood. FRP has a higher tensile strength than steel, is lightweight, corrosion-resistant, and more economical in reinforcement handling. Research on wood reinforcement with FRP has been conducted, demonstrating increased strength and stiffness of wood. The use of FRP not only strengthens the structure but also preserves aesthetic values, making it suitable for the conservation of heritage buildings. Test results show an increase in the load and flexural strength of wood after reinforcement with FRP, using FRP sheets for reinforcement. The common failure process occurs in the bonding type. The flexural load of wood increases by 29.07%, with the average load after reinforcement reaching 21.4 kN. The flexural strength of wood also increases by 20.92%, with the average strength after reinforcement reaching 95.52 MPa. The deflection of wood after reinforcement with FRP tends to be smaller, with an average deflection of 15.75 mm compared to untreated wood with a deflection of 13.602 mm. Theoretical simulations without FRP show an average deflection of 20.20 mm, indicating that reinforcement with FRP successfully reduces deflection by 12%. This study indicates that structural reinforcement using FRP not only enhances the performance of wood structures but also reduces deflection with potential applications in the conservation of heritage buildings