DETERMINATION OF MODAL PARAMETERS OF REINFORCED CONCRETE BOX CULVERT RETROFITTED WITH GFRP USING FINITE ELEMENT METHOD

Abstract

This paper presents a new method for the reinforcement of concrete box culvert, which is the most common type of culvert, by applying a thin layer of glass fiber reinforced polymer composite (GFRP), the fiber glass reinforced polymer composite has a high resistance against corrosion and chemicals. Therefore, effectively eliminate corrosion problems and increase the service life of concrete culvert. In this study, the strengthening method was used (GFRP) using the finite element method. As a result of the reinforcement was made by wrapping a fabric (GFRP) with a thickness of 3 mm in the concrete structure of the culvert, which is 12.6 m long, 3.72 m high, and 3.65 m wide. The differences between typical parameters of concrete culvert and GFRP reinforced culvert were compared. These conditional parameters are period and mode forms. The first five case modes with and without GFRP were examined by a finite element method. A difference of 5% - 8% was observed in the periods of the first five modes. It has been observed that reinforcement.