Pre-impregnated carbon fibre reinforced composite system for patch repair of steel I-beams

Manalo, Allan; Sirimanna, C. S.; Karunasena, Warna; McGarva, L.; Falzon, Paul

doi:10.1016/j.conbuildmat.2015.12.172

Cited by 31 publications

(10 citation statements)

References 14 publications

(31 reference statements)

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“…Several studies have been carried out on rehabilitating steel beams using CFRP. Flexural rehabilitation of damaged steel beams using CFRP sheets was conducted by Chen and Das (2009), and Manalo et al (2016). The studies concluded a slight increase in the stiffness of the rehabilitated beams.…”

Section: © Ascementioning

confidence: 99%

Rehabilitation of Steel I-Beam with Basalt Fiber Reinforced Polymer

Bastani¹,

Adesina²,

Das³

et al. 2020

Structures Congress 2020

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Deterioration of our infrastructure cannot be totally avoided due to severe conditions to which they are exposed to. A significant number of steel structures, especially bridges, undergoes deterioration due to corrosion as they are situated outdoors and subjected to moisture and other deleterious chemicals. Due to economic and other constraints, replacement of all these deteriorating structures is not feasible. Therefore, their effective rehabilitation is paramount. One of the effective ways to rehabilitate steel structures is with the use of fibre-reinforced polymers (FRP). This paper explores the effectiveness of rehabilitating corroded webs in steel I-shaped beams with unidirectional basalt fibre reinforcement polymer (BFRP) fabric. The structural deficiency was induced to the web of the beam by cutting a circular shaped area out of the web. The section loss was repaired with BFRP fabric using the wet lay-up technique. Overall, seven beams were tested utilizing a 4-point test setup, including a control (undamaged) beam, control corrosion (damaged) beam, and five rehabilitated specimens. Two patterns of rehabilitation were performed by attaching BFRP fabrics in horizontal and vertical orientations. The study concluded that the BFRP fabrics were effective in restoring elastic stiffness, yield load, and ultimate load capacity of rehabilitated beams to that of an undamaged steel beam. The tests also showed that there was a direct correlation between the improvement of structural behaviour and thickness and orientation of the BFRP fabric. Nonlinear finite element analysis was successfully used in this study to determine the optimum pattern of rehabilitation with BFRP fabrics.

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Section: © Ascementioning

confidence: 99%

Rehabilitation of Steel I-Beam with Basalt Fiber Reinforced Polymer

Bastani¹,

Adesina²,

Das³

et al. 2020

Structures Congress 2020

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“…The results indicated that joints with adhesive bond showed nearly five times higher average strength than pure riveted joints. Generally speaking, in comparison with the traditional methods such as riveting or other mechanical joint methods, the bonded composite patches can effectively repair damaged metal structures without introducing new defects or stress concentrations, and make the repaired systems present a higher strength . Schubbeet et al studied the repaired effect of graphite‐epoxy and boron‐epoxy composite patches on the fatigue properties of damaged aluminum plates in the corrosive environment.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of UV‐curable carbon fiber‐reinforced polymer composite patch: Repair evaluation of damaged aluminum alloy

Liu

2019

Polymers for Advanced Techs

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Epoxy resin composite patches reinforced by carbon fiber were prepared through ultraviolet (UV)-curing method, and the damaged aluminum alloy plates are rapidly repaired by means of adhesively bonding method. Mechanical properties of the composite patches and damaged aluminum alloy plates before and after repair were studied by experiment and numerical simulation. Results indicated that the tensile properties of carbon fiber/epoxy resin composite patches presented the tendency of first increase and then decrease with the increase of layer numbers of reinforced fiber. The composite patches with two layers fiber showed the best tensile properties, and the tensile strength and modulus reached 1.13 GPa and 27.79 GPa, respectively. However, the bending strength of composite patches decreased with the increase of layer numbers. Results of performance evaluation on the mechanical properties of damaged aluminum alloy plates repaired by the two layers carbon fiber/epoxy resin composite patches showed that the repair efficiency of tensile and bending properties of the repaired aluminum alloys reached more than 83% and 160%, respectively, compared with the undamaged aluminum alloys. Besides, results of numerical simulation showed that the stress intensity factor (SIF) of the crack tip on repaired aluminum alloy plates decreased significantly in comparison with the unrepaired aluminum alloy plates, which further revealing the reinforced mechanism of composite patches on the bending properties of repaired aluminum alloy plates. KEYWORDS finite element analysis (FEA), mechanical properties, polymer composite patches, repair materials, ultraviolet light curing 1 | INTRODUCTION The aluminum alloys are widely used in aerospace, automobile, ships, machinery manufacturing, and chemical industry because of the low density, high specific strength, and good thermal and electric conductivity. 1 Since aluminum alloy structures are unavoidably exposed to repetitive loads or humid environment frequently during its service life, the corrosion or fatigue damage generates easily on the aluminum alloy structures under the electrochemical effect. Therefore, it is urgent to rapidly and effectively repair the mechanical properties of the cracked aluminum alloy structures.Traditional methods of repair normally consist of riveting an additional reinforcement onto the damaged area. For the repair of metal structures, the hot-driven rivets have been extensively used from the end of 18th century. However, the hot riveting process also induces high stress concentrations in the metallic plates and makes the riveted connections become weak. 2 Hence, with the development of materials technology, it is necessary to find a more effective repair

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“…Всё это приводит к тому, что возникла необходимость определять их прочностные и деформационные свойства при различных видах нагружения. В литературе этому вопросу уделено особое внимание [1][2][3][4][5]. Несмотря на многочисленные работы по анализу и интерпретации известных в литературе экспериментальных данных в настоящий момент нет полного понимания явлений, происходящих в композитах при различных видах силовых воздействий [6,7].…”

Section: Introductionunclassified

“…Среди современных композиционных материалов достаточно широкое распространение получил углепластик, представляющий собой материал из углеродных волокон, пропитанных эпоксидным связующим, который в незатвердевшем состоянии легко формуется. Это дает возможность довольно успешно использовать его для увеличения несущей способности и ремонта бетонных, железобетонных, каменных, стальных и деревянных конструкций [1][2][3][4][5]. Углепластики относятся к классу полимерных композиционных материалов из переплетённых нитей углеродного волокна, расположенных в матрице из полимерных (эпоксидных) смол.…”

Section: Introductionunclassified