International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 06 | Jun 2024
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p-ISSN: 2395-0072
Review paper on Strengthening of Column using BFRP Surya K U 1, K V Mahesh Chandra 2 1MTech Student, Dept. of Civil Engineering, BIT college, Bangalore, Karnataka
2 Assistant Professor, Dept. of Civil Engineering, BIT college, Bangalore, Karnataka
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Abstract - This paper provides a detailed overview of
conditions and has shown to enhance the strength and ductility of the column.
column strengthening strategies utilizing Basalt Fiber Reinforced Polymer (BFRP) composites. With the growing demand for retrofitting and increasing load-carrying capacity in existing structures, BFRP is now recognized as a useful material because of its outstanding mechanical qualities, corrosion resistance, and environmental sustainability. The review discusses a wide range of topics, including BFRP properties, different strengthening procedures, experimental research, analytical models, and design guidelines for BFRP strengthened columns.
FRP, a composite material that combines a polymer matrix with fibers with typically glass, carbon, or aramid, likewise basalt, paper, wood, or asbestos is widely used in industries such as aerospace, automotive, marine, and construction. The researchers investigated the effect of wrapping concrete cylinders with various FRP materials and bonding sizes on their strength. Their findings showed that critical elements such as the wrapping material’s elasticity and Poisson’s ratio have a significant influence on the strength of covered concrete.
Key Words: Column, Basalt Fibre Reinforced Polymer (BFRP), Strengthening, Wrapping, Compression Strength.
1.1 Basalt Fiber Reinforced Polymer (BFRP)
1.INTRODUCTION
Basalt Fiber Reinforced Polymer (BFRP) composites have developed as a possible alternative to traditional construction materials because to its superior mechanical qualities, durability, longevity, and affordability.
Old reinforced concrete structures frequently suffer from weakened concrete and insufficient reinforcing, which leads to instability. To address this issue, engineers use approaches such as wrapping columns with steel jackets or fiber-reinforced cementitious matrix (FRCM) composites. These methods improve the structural integrity and seismic resilience of the columns. Steel jackets, FRCM composites, Ferro cement jackets, and fiber-reinforced polymer (FRP) jackets are among the ways utilized to increase the strength and ductility of these columns, particularly in key stress zones. Studies show that technologies such as steel jackets and FRCM composites considerably enhance the performance of reinforced concrete columns.
Fibers produced from basalt are made from the natural volcanic rock basalt using a complex process that includes melting, extrusion, and spinning. The resultant fibers have great tensile strength, superior corrosion resistance, and thermal stability. Then these fibers are combined with a polymer matrix, such as epoxy or polyester resin, to create Basalt fiber reinforced polymer composites. To acquire the appropriate mechanical qualities, the basalt fibers are conceived with polymer resin before being cured under regulated conditions.
Fiber Reinforced Polymer (FRP) have been used in the form of external wrapping such that it will strengthen the existing structure. Significant researches are being carried out in this field for the past few decades, as the need for strengthening has been grown rapidly, and many design guidelines have been published for Fiber Reinforced Polymer reinforcements including column confinement. The method of application of these fibers is of great importance. From the application point of view, the FRP products are placed, according to various techniques, such that the in case of discrete fibers they are dispersed in the matrix and fiber sheets they are wrapped around the structures. When the load is applied axially to a concrete column, there will be the lateral expansion, and it can be restrained by the effect of confinement provided by the FRP laminates. A lateral confinement pressure will be provided by FRP which delays the softening of the column under the various loading
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BFRP composites have a unique set quality that make them appropriate structural reinforcement applications. High tensile strength, rigidity, resilience to corrosion and thermal stability. Additionally, BFRP composites are lightweight, making them simple to transport and install. Furthermore, basalt fibers are non-toxic and non-carcinogenic, unlike typical reinforcement materials like fiberglass or carbon fiber. Due to the usage of basalt fibers produced from abundant basalt rock around the world, BFRP composites provide environmental benefits. Unlike carbon fibers, which have a large environmental footprint due to petroleum-based manufacture, basalt fibers have a small carbon footprint and are renewable. In addition, BFRP composites are recyclable, which reduces their environmental impact.
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