scholarly journals Fibre Reinforced Polymer in Retrofitting

2021 ◽  
Vol 9 (12) ◽  
pp. 83-87
Author(s):  
Sumirah Nisar
Keyword(s):  
Construction Industry ◽  
Seismic Damage ◽  
Seismic Action ◽  
Existing Structures ◽  
Frp Composite ◽  
Current State ◽  
Reinforced Polymer ◽  
Earthquake Resistant ◽  
The World ◽  
Fibre Reinforced Polymer

Abstract: Retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion etc. Many of the existing reinforced concrete structures throughout the world are in urgent need of rehabilitation, repair or reconstruction because of deterioration due to various factors like corrosion, lack of detailing, failure of bonding between beamcolumn joints etc. Fibre Reinforced Polymer (FRP) composite has been accepted in the construction industry as a promising substitute for repairing and in incrementing the strength of RCC structures. It stabilizes the current structure of buildings and making them earthquake resistant. This paper presents a representative overview of the current state of using FRP materials as a retrofitting technique for the structures not designed to resist seismic action. It summarizes the scopes and uses of FRP materials in seismic strengthening of RCC structures and masonry retrofitting. Keywords: Retrofitting, Rehabilitation, Seismic damage, fibre

scholarly journals Repair and Rehabilitation of RCC Beam using Synthetic Fiber Material

2019 ◽  
Vol 8 (12S) ◽  
pp. 1020-1022
Keyword(s):  
Fiber Material ◽  
Fiber Reinforced Polymer ◽  
Synthetic Fiber ◽  
Existing Structures ◽  
Frp Composite ◽  
Reinforced Polymer ◽  
Test Study ◽  
The World ◽  
Carbon Filaments

Retrofitting is the alteration of existing structures to make them continuously impenetrable to seismic development, ground development, etc. A large number of the current strengthened solid structures all through the world are in pressing need of recovery, fix or reproduction in light of crumbling because of different factors like consumption, absence of itemizing, disappointment of holding between pillar segment joints and so on. Fiber Reinforced Polymer (FRP) composite has been acknowledged in the development business as a promising substitute for fixing and in augmenting the quality of Reinforced concrete structures. This paper exhibits a test study on fortified solid shafts retrofitted with different kinds of filaments remotely. The goal of this examination is to explore the conduct of shafts in the wake of retrofitting utilizing different normal and engineered filaments including steel strands, polypropylene strands, glass filaments, Basalt filaments, carbon filaments and so forth.

Flexural behaviour of concrete beams internally reinforced with GFRP rods and steel rebars

2003 ◽  
Vol 21 (4) ◽  
pp. 146-157 ◽  
Author(s):  
H.Y. Leung ◽  
R.V. Balendran
Keyword(s):  
Construction Industry ◽  
Concrete Beams ◽  
Concrete Members ◽  
Frp Composite ◽  
Reinforced Polymer ◽  
Beam Design ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced ◽  
Steel Rebars

Use of fibre‐reinforced polymer (FRP) composite rods, in lieu of steel rebars, as the main flexural reinforcements in reinforced concrete (RC) beams have recently been suggested by many researchers. However, the development of FRP RC beam design is still stagnant in the construction industry and this may be attributed to a number of reasons such as the high cost of FRP rods compared to steel rebars and the reduced member ductility due to the brittleness of FRP rods. To resolve these problems, one of the possible methods is to adopt both FRP rods and steel rebars to internally reinforce the concrete members. The effectiveness of this new reinforcing system remains problematic and continued research in this area is needed. An experimental study on the load‐deflection behaviour of concrete beams internally reinforced with glass fibre‐reinforced polymer (GFRP) rods and steel rebars was therefore conducted and some important findings are summarized in this paper.

The all-composite road bridge – a proposal for rapid urbanisation

2018 ◽  
Author(s):  
Tomasz Siwowski ◽  
Aleksander Kozlowski ◽  
Leonard Ziemiański ◽  
Mateusz Rajchel ◽  
Damian Kaleta
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Construction Materials ◽  
Fast Growing ◽  
Frp Composites ◽  
Frp Composite ◽  
Reinforced Polymer ◽  
Composite Bridge ◽  
Fibre Reinforced Polymer ◽  
Traditional Construction

<p>Technology and materials can help cities get smarter and cope with rapid urbanisation. Life cycle assessment (LCA) is one of the approaches applied in evaluation of material sustainability. Many significant LCA comparisons of innovative and traditional construction materials indicate that fibre- reinforced polymer (FRP) composites compare very favourably with other materials studied. As a proposal for rapid urbanisation, the FRP all-composite road bridge was developed and demonstrated in Poland. The paper describes the bridge system itself and presents the results of research on its development. The output of the R&amp;D project gives a very promising future for the FRP composite bridge application in Poland, especially for cleaner, resilient and more environmentally efficient infrastructure of fast-growing cities.</p>

scholarly journals Fibre reinforced polymer for strengthening cylindrical metal shells against elephant’s foot buckling: An elasto-plastic analysis

2018 ◽  
Vol 21 (16) ◽  
pp. 2483-2498 ◽  
Author(s):  
Mustafa Batikha ◽  
Jian-Fei Chen ◽  
J Michael Rotter
Keyword(s):  
Cylindrical Shell ◽  
Polymer Composites ◽  
Seismic Action ◽  
Strengthening Effect ◽  
Reinforced Polymer ◽  
Cylindrical Metal ◽  
Different Types ◽  
Fibre Reinforced Polymer ◽  
Parameter Values ◽  
High Internal Pressure

This article describes the use of fibre reinforced polymer composites to increase the strength of an isotropic metallic cylindrical shell against elephant’s foot buckling. This form of buckling occurs when a cylindrical shell structure is subjected to high internal pressure together with an axial force, such as those that may occur in tanks and silos. It is particularly relevant to tanks under seismic action. Although fibre reinforced polymer composites have been widely applied to different types of structures under several loading conditions, its use to strengthen thin steel cylindrical shells has been very limited. Here, a non-linear elasto-plastic finite element idealisation is used to explore the strengthening effect of a fibre reinforced polymer strip on a thin cylinder. The optimum size and position of the fibre reinforced polymer sheet were obtained and empirically formulated. This study has shown that the strength after repair is sensitive to minor changes in the fibre reinforced polymer parameters so that a close adherence to the optimum parameter values is very desirable.

Carbon Footprint Analysis of Fibre Reinforced Polymer (FRP) Incorporated Pedestrian Bridges: A Case Study

2012 ◽  
Vol 517 ◽  
pp. 724-729
Author(s):  
Jian Guo Dai ◽  
Tamon Ueda
Keyword(s):  
Construction Industry ◽  
Carbon Footprint ◽  
Prestressed Concrete ◽  
Environmental Friendliness ◽  
Pedestrian Bridge ◽  
Reinforced Polymer ◽  
Pedestrian Bridges ◽  
Fibre Reinforced Polymer ◽  
Footprint Analysis

This paper presents a case study on the carbon footprint of a fibre reinforced polymer (FRP)-incorporated pedestrian bridge in comparison with a conventional prestressed concrete (PC) one. The CO2 emission is used as an index and calculated for both the material manufacturing and the construction processes. It is shown that using an FRP-incorporated pedestrian bridge to replace a conventional prestressed concrete (PC) bridge may reduce the CO2 emission by 18% and 70%, respectively, during the material manufacturing and construction periods, leading to a total reduction by about 26%. Such reduction is expected to be more significant if the life-cycle CO2 emission is accounted for, since the former type of bridge is free of corrosion and almost maintenance-free. Therefore, FRP-incorporated bridges may become a more competitive alternative to conventional reinforced concrete (RC) or PC ones with the increasing attention paid on the sustainability and environmental friendliness of construction industry by our society.

scholarly journals Modelling and Validation of the Composite Shell of a Train Seat

2020 ◽  
Vol 64 (189) ◽  
pp. 75-84
Author(s):  
Łukasz Gołębiowski ◽  
Marcin Siwek ◽  
Marcin Ciesielski ◽  
Andrzej Zagórski ◽  
Sławomir Krauze ◽  
...  
Keyword(s):  
Experimental Validation ◽  
Composite Shell ◽  
Strength Analysis ◽  
Material Structure ◽  
Frp Composites ◽  
Frp Composite ◽  
Industry Standard ◽  
Reinforced Polymer ◽  
Physical Prototype ◽  
Fibre Reinforced Polymer

The subject of the modelling work and the conducted experiments is the composite shell of a train seat. The activities carried out involved designing the geometry, planning the material structure, and selecting the materials to be used. The shell was built using polymer matrix fibrous composites (i.e. FRP – Fibre Reinforced Polymer – composites), which are lighter than steel and comply with the relevant standards for strength and safety at the same time. This was followed by creating a computational model for the shell and conducting a strength analysis in accordance with the guidelines of the relevant industry standard and strength hypotheses adopted for FRP composites. The calculations were conducted using ANSYS Composite PrepPost software based on the finite element method. The article offers a strength analysis of an optimised composite shell of a train seat. Based on the guidelines obtained as a result of the conducted modelling work, a physical prototype (validation model) of the seat was created. Hot vacuum lamination technology was applied in the production process. The experimental validation of the model, producing a positive result, was conducted using a test stand owned by S.Z.T.K. TAPS – Maciej Kowalski. Keywords: train seat structure, FRP composite, FEM modelling, experimental validation

An investigation on fire hazard and smoke toxicity of epoxy FRP composites

2017 ◽  
Vol 8 (3) ◽  
pp. 230-237
Author(s):  
Saeed Bakhtiyari ◽  
Leila Taghi Akbari ◽  
Masoud Jamali Ashtiani
Keyword(s):  
Heat Release ◽  
Construction Industry ◽  
Fire Hazard ◽  
Test Method ◽  
Fiber Reinforced Polymers ◽  
Content Type ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Cone Calorimeter Test ◽  
Fibre Reinforced Polymer

PurposeThe purpose of this study is assessment of fire and smoke hazards of some fiber reinforced polymers (FRP). The use of FRP strengthening strips has been found rapid growth in construction industry of Iran and many other countries. However, the fire and smoke hazards of these materials in both construction and use phases need to be determined and the appropriated measures against fire should be taken. Design/methodology/approachThe fire hazards of two types of fibre-reinforced epoxy composites (graphite fibre-reinforced polymer and carbon fibre-reinforced polymer) were investigated in bench-scale using cone calorimeter test method. Time to ignition, heat release rate, total heat release, smoke release and carbon monoxide production were measured and analysed. Time to flashover of an assumed room lined with the tested FRP was analysed with Conetools software. Smoke production and toxicity of the considered composites were also analysed and discussed, using the fractional effective dose parameter. FindingsThe results showed that the tested FRP products had a high fire hazard and a potential high contribution to fire growth. The tests also proved that the used epoxy resin had a low glass transition temperature, around 50°C; therefore, the mechanical strength of the product could be drastically reduced at first stages of a probable fire incident. This also showed that a regular thermal barrier, typically used for protection of plastic foams against fire, could not be sufficient for the protection of strengthening FRP composites. Originality/valueThis research was carried out for the first time for the materials used in construction industry of Iran. The results and achievements were very useful for safe use and development of proper details of application of the system.

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