Repairing of Reinforced Concrete Beam

Abstract

Strengthening of reinforced concrete beams is required due to design errors, deficient concrete production, bad execution processes, damage due to earthquakes, accidents such as collisions, fire, explosions, and situations involving changes in the functionality of the structure, etc. In the present paper, there is a reinforced concrete bridge and a reinforced concrete dam built interconnecting each other. All the frame structures are in a good condition except for the beam of the dam part in front of the bridge. The beam members are cracked and deflected from the structure due to the soil pressure under the bridge and the vibration load comes from the vehicles. There are several repair methods for a reinforced concrete structure. One of the repairing methods is a beam-jacketing method, and for this study have found this method is suitable and has been able to repair the cracked and deflected beam. Jacketing of the reinforced concrete beam has been done by enlarging the existing cross-section with a new layer of concrete that have reinforced with both longitudinal and transverse reinforcement. Four different methods have been employed for jacketing of reinforced concrete beams. According to this study, have removed the soil between the concrete bridge and the reinforced concrete dam structure and have built a retaining wall to solve the problem by the sudden load coming from the traffic and to block the soil pressure from under the bridge. To repair the cracked and deflected beam using this method, the structure is first partially have removed and Thoroughly cleaned, and then the structure has restored using a bonding agent to allow the new concrete to blend well with the old concrete.

Keywords: Reinforced concrete beam, Repairing, Jacketing, Shear wall, Soil pressure.

DOI: 10.7176/CER/14-3-02

Publication date:May 31^st 2022