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Fire Protection System Assignment - Desklib
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Added on 2020-05-08
Fire Protection System Assignment - Desklib
Added on 2020-05-08
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Fibre-reinforced polymer also known as (FRPs) fiber-reinforced plastics, (FRP) is a compositematerial, which is usually made of a polymer matrix that is reinforced with fibers (Huang, 2009).The common fibers which are used are usually glass, carbon, aramid or basalt. The FRPs aregaining a lot of recognition and increasing their usage in these industries. The polymers aredesigned to meet some specific condition and this has led to their increased usage. Nevertheless,these materials also require some special attention which will ensure that they are able tomitigate their available defects. One of the key defects when it comes to the FRPs is their abilityto withstand fire for a long time (Firmo, Correia, and França, 2012). This means that thesematerials have poor fire resistivity. Their inability to withstand fire has led to research ondifferent mechanisms which can be adopted to make the materials better used in fire prone zones.Fire protection is usually defined as the practice taken to mitigate the unwanted effects anddestruction due to fire occurrence (Katz, Berman and Bank, 2010). The common areas where theFRPs are applied are prone to fire and this causes the key requirement to ensure that thestructures build using these materials are safe and stable. This paper will be able to analyze thedifferent fire protection mechanisms and their performance when FRPs are applied. First, the properties of FPRs are able to make them suitable to resistant to fire and high temperatures. iiApplication of FRPsThe FRPs have found their application on different industries such as the aerospace, automotive, marine and even the construction industry (Mallick, 2017). The construction industry, and more specifically the members are highly affected by fire. Their strength is able to reduce with increase in fire effects. FRPs have been gaining popularity a lot in the past decades. Fireiiiprotection systems have been enhanced a lot in relation to the adoption of the fibre-reinforced 2
polymer in different industries. The construction industry has in the past years seen a lot of efforts in increase of fire protection of the FRPs (Ahmed and Kodur, 2011). In civil engineering and structures, the consideration for the fire exposure has become a key element. Performance ofstructures under fire is a key element which structures are able to focus on (Barros and Fortes, 2006). The introduction of FRP is able to enhance the strengthening of fire resistance on such structures. Although the documentation of FRPs is not common, the use of FRPs has been in application since 1980s. Bond properties and mechanical characteristics to enhance the resistanceon fire has been some of key areas of focus in relation to the FRPs. The increased use of FRPs inthis industry has led to various reviews on the available mechanism for the fire protection on such structures. The different mechanisms has been able to perform differently with combinationwith the FRP ( Katz, 2009). This facture has led to the increased adoption of the material in many construction activities ranging from slab, beams and even the columns. ivAccording to Benichou at al., (2010), many FPRs have designed insulation which is made toresist the increase on temperature when buildings and structures are under fire. The behavior ofthe FRPs under fire has raised the need of the fire protection mechanisms on the structures.nevertheless, there have been lack of proper address of the limitations on the use of FRPs atdifferent segments. Th FRP characteristics has raised the need to have the fire protectionmechanisms considering its combination with fire spreading.In construction industry, the FRPs have found their way and they are gaining popularity at a highrate. The need to mitigate the fire spread effect of the FRPs and their inability to withstand the fire for a long time has raised the need for innovations on the fire protection mechanisms on these materials. Use of insulation has become a common norm for the structure elements such as the beams, columns and slabs in the construction industry (Fib bulletin 14, 2011). Proper 3
materials such as cementitious materials and gypsum have been used as coatings in these elements to enhance the fire resistance. In addition, the materials used for the fire protection havebeen able to enhance the structural capacity of the construction elements. These mechanisms are used to lower the heat penetration in case of fire or absorb the fire effects (Maraveas, Miamis andVrakas, 2012). This effect is able to increase the fire resistivity thus taking longer to reach the FRP material. There is need therefore to control the fire effect when the FRPs are used in the different industries. Structure of FRPs and relation to fireIn terms of structure, the FRPs have high-strength fibers which are embedded in a polymer matrix. This makes them suitable for consideration in fire prone structures. Moreover, the adoption of the FRPs in the construction industry has been promoted due to the high strength of the material, corrosion resistance and its ease of application (Kodur and Ahmed, 2010). The FRPs have been also applied in the strengthening of concrete structures such as beams, columns and slabs. Nevertheless, the strength of the FRPs with the temperature increase is able to affect the strength of the materials. This raises the need to have fire protection mechanisms for the FRPs (Green, 2014). The most common materials which are used for the FRP include the Aramid, Carbon and Glass FRP. Their bond strength is able to vary differently when the structure is exposed to fire. This makes the need to have the fire protection mechanism to have a key say. The graph below is able to show the behavior of the FRPs when exposed on heat. The FRPs behavior as show, is able to raise the need of the fire protection mechanisms to enhance fire resistance. v4
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