International Scientific Journal of Engineering and Management

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Effect of strengthening Schemes on Concrete Beams and Columns retrofitted with GFRP

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Effect of strengthening Schemes on Concrete Beams and Columns retrofitted with GFRP

Mr. Om Ramesh Kale

 

ABSTRACT

 

The research work described focuses on the use of Glass Fiber Reinforced Polymers (GFRP) for strengthening Reinforced Cement Concrete (RCC) structures. The need for strengthening arises due to factors such as insufficient capacity, corrosion of internal reinforcing steel, changes in use, poor initial design, and more stringent design codes. The objective is to improve the function and lifespan of the structures using GFRP materials.

GFRP offers several advantages over conventional reinforcement materials, including high strength, stiffness, corrosion resistance, ease of installation, simple repair methods, excellent durability, long service life, minimum maintenance, and lower life cycle costs.

The experimental program consists of testing RCC beams and columns strengthened with GFRP sheets. For the beams, a symmetrical two-point concentrated loading system is used, and three sets of beams are tested: control beams, single-layered GFRP (S1) beams, and double-layer GFRP (S2) beams. The tests involve measuring load, deflection, and failure modes of the beams to investigate the effect of the number of GFRP layers and their orientation on load carrying capacity and failure mode.

For the columns, axial compression tests are conducted using Universal Testing Machine (UTM). Three sets of columns are tested: control columns, columns reinforced with single layers of GFRP sheets, and columns reinforced with double layers of GFRP sheets. The aim is to enhance the ductility and compressive strength of the columns. The interaction curve of wrapped RCC columns with GFRP is also studied, focusing on the compressive control region.

The research work includes both experimental and analytical studies to understand the behavior of RCC beams and columns reinforced with GFRP sheets. The keywords associated with this research include FRP, GFRP, load, deflection, RCC beam, RCC column, and axial compressive strength.  Overall, the research aims to provide insights into the strengthened behavior of RCC beams and columns using GFRP sheets, contributing to the knowledge and understanding of GFRP strengthening techniques for concrete structures.


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