International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 03 | Mar 2024
p-ISSN: 2395-0072
www.irjet.net
A Study on Literature of Strengthening of Beam Partial Replacement of Cement by GGBS & Fly Ash and Using CFRP Wrapping Kajol Dhanaji Bhosale1, Prof. S.B. Mohite2 1PG Students, Department of Civil Engineering, Kolhapur Institute of Technology’s College of Engineering
(Autonomous),Kolhapur
2Sandip Mohite, Assistant Professor, , Department of Civil Engineering, Kolhapur Institute of Technology’s College
of Engineering (Autonomous),Kolhapur ---------------------------------------------------------------------***--------------------------------------------------------------------Key Words: fibre-reinforced polymer (FRP), Carbon Fibre Abstract - In recent years, the construction industry sheets, ultimate load.
has increasingly included Fibre Reinforced Polymer (FRP) as a means of reinforcing structures. This practise often involves utilising FRP in conjunction with other commonly used construction materials, including wood, steel, and concrete. Fiber-reinforced polymers (FRPs) provide a range of enhanced characteristics, including a high ratio of strength to weight, a high ratio of stiffness to weight, design flexibility, resistance to corrosion, high fatigue strength, and simplicity of application. Several researchers have conducted studies on the application of FRP sheets or plates as bonding materials for concrete beams. The utilisation of adhesive bonded FRPs for the purpose of enhancing structural integrity has been widely recognised as a successful technique applicable to various forms of concrete constructions, including columns, beams, slabs, and walls. The utilisation of Fibre Reinforced Polymer (FRP) materials for the purpose of external reinforcement of pre-existing concrete structures has been on the rise due to its advantageous properties, including non-corrosiveness, nonmagnetism, and resistance to a wide range of chemical substances. Previous research has demonstrated that the application of externally bonded glass fiber-reinforced polymers (GFRP) can effectively augment the flexural, shear, and torsional strength of reinforced concrete (RC) beams. The utilisation of flexible glass fibre sheets has been seen to be highly advantageous in enhancing the structural integrity of RC beams. This is mostly due to their adaptable characteristics, simplicity of manipulation and application, as well as their exceptional tensile strength-to-weight ratio and stiffness. The utilisation of FRPs in the restoration of preexisting concrete structures has shown significant and rapid growth in recent years. Numerous studies have demonstrated the effective use of FRP materials for enhancing the structural integrity of concrete beams that exhibit deficiencies in flexural, shear, and torsional capacities. Regrettably, the existing Indian concrete design standards, commonly referred to as IS Codes, do not incorporate any rules pertaining to the reinforcement of structural elements in terms of flexural, shear, and torsional strengthening utilising FRP materials. Due to the lack of design standards, research and industry collaborated to explore and advocate for FRP in structural restoration, notably flexural, shear, and torsional rehabilitation. Carbon, aramid, or glass fibres are mixed with a polymeric matrix like thermosetting resin to make FRP. Fibers are the main load-bearing component of FRP.
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1.INTRODUCTION To mitigate the issues arising from the corrosion of steel reinforcement in concrete structures, scholarly investigations have indicated the viability of substituting steel reinforcement with fibre reinforced polymer (FRP) reinforcement. The degradation of the steel reinforcement within reinforced concrete (RC) constructions has a detrimental impact on the mechanical properties of both the steel and the concrete materials. The corrosion of a steel reinforcing bar leads to a reduction in its cross-sectional area, which in turn compromises its structural integrity. The corrosion of steel reinforcing bars causes the concrete to weaken as fractures occur in the concrete cover due to the expansion of corrosion products. The rehabilitation of infrastructures is a well-established practise, with several projects having been implemented globally in the last twenty years. One method employed to enhance the structural integrity of reinforced concrete elements is the application of steel plates externally, utilising two-component epoxy adhesives. Through this approach, it becomes feasible to enhance the mechanical efficacy of a structural element. The extensive application of this technique in diverse architectural and engineering contexts, encompassing structures such as buildings and bridges, has substantiated its efficacy and practicality. Notwithstanding this fact, the plate bonding process exhibits several drawbacks attributable to the utilisation of steel as a strengthening material. The primary disadvantages associated with steel include to its substantial weight, which poses challenges in terms of on-site plate handling, as well as its susceptibility to corrosive conditions. In addition, steel plates possess. 1.1 Objective 1. For the present research, the following objectives have been set. 2. To evaluate the effectiveness of the external GFRP wrapping technique in retrofitting of built RC Beam. 3. Determine the maximum load-bearing capacity of the specimens retrofitted using the FRP
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