FRP materials for the rehabilitation of tubular steel structures, for underwater applications

Seica, Michael V.; Packer, Jeffrey A.

doi:10.1016/j.compstruct.2006.05.029

Cited by 134 publications

(77 citation statements)

References 11 publications

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“…It is obvious from relevant literature that the number of CFRP layers, and the layer orientation, affect the strength of the sections primarily when they are subjected to compression and bending. It can also be seen that three layers of CFRP configuration, with the HHL and LLH layer orientation, were able to increase the ultimate strength by the maximum of 3 % and 27 % for compact section, and these were the least strength increment among all configurations of CFRP to strengthen non compact and slender sections [23,24]. Several researchers have proposed to use an adhesion promoter to increase the bond between the steel and CFRP composites.…”

Section: Introductionmentioning

confidence: 98%

“…Two layers of fabric (LL), with the fibres oriented longitudinally to the length of the tube, were confined with a third layer (H) with the fibres oriented transversely, and were used to strengthen compact circular hollow tubes. This configuration for compact section increased the ultimate load by about 27 % compared to an unstrengthened beam [24]. It is obvious from relevant literature that the number of CFRP layers, and the layer orientation, affect the strength of the sections primarily when they are subjected to compression and bending.…”

Section: Introductionmentioning

confidence: 99%

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Utjecaji orijentacije slojeva CFRP traka na ojačanje šupljih čeličnih elemenata

2015

JCE

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This paper studies the effects of orientation of CFRP (carbon fibre reinforced polymer) strip layers on the improvement of bearing capacity of strengthened steel-made circular hollow elements. The four point bending test was conducted, and elements were subjected to bending until failure. The improvement of bearing capacity of strengthened tubular steel elements is presented in terms of failure load, stiffness, composite beam action, and modes of failure. Beams strengthened with CFRP strips with two longitudinal layers and one layer along the periphery performed better than the beams reinforced with one longitudinal layer and two layers along the periphery. Utjecaji orijentacije slojeva CFRP traka na ojačanje šupljih čeličnih elemenata U ovom se radu proučavaju utjecaji orijentacije slojeva CFRP traka (polimera ojačanih ugljičnim vlaknima) na poboljšanje nosivosti ojačanih čeličnih kružnih šupljih elemenata. Provedeno je ispitivanje savijanjem uz djelovanje sila u četiri točke, a elementi su opterećeni na savijanje do sloma. Poboljšanje nosivosti ojačanih cijevnih čeličnih elemenata analizirano je s obzirom na silu otkazivanja, krutost, kompozitno djelovanje i vrstu sloma. Nosači armirani CFRP trakama s dva uzdužna sloja i jednim po obodu pokazuju bolje ponašanje od nosača armiranih s jednim uzdužnim slojem i dva sloja po obodu.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Utjecaji orijentacije slojeva CFRP traka na ojačanje šupljih čeličnih elemenata

2015

JCE

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“…The hollow steel tubular (HSS) sections possess excellent structural and earthquake-resistant properties such as high strength and high ductility, and have gained increasing popularity in buildings, bridges and other structural applications as either onshore or offshore structures [1]. But they are exposed to deterioration, fi re and corrosion due to severe environmental conditions or to the development of fatigue cracks when the structure is subjected to cyclic loads.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, rehabilitation methods using fi bre reinforced polymer (FRP) composites do not exhibit any of these drawbacks. The advantages of FRP over steel plates are the low weight of the bonded material, easy applicability and the capacity to cover areas with limited access, where the use of traditional techniques would be impractical [1]. High stiffness fi bres, such as carbon fi bres, can effectively enhance the structural properties of steel structures; additionally, composites could also enhance the fatigue life of steel structures.…”

Section: Introductionmentioning

confidence: 99%

“…Seica et al [1] investigated the fl exural performance of compact circular hollow sections (CHS) beams strengthened by CFRP sheets (two layers in the longitudinal direction and one in the transverse direction). In addition to strength increase, they found that a class 2 section wrapped with CFRP can reach a moment capacity above the plastic moment capacity, with increased ductility and rotation capacity.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Corroded Hss Tubular Members under Compression Strengthened with CFRP Composites

Sundarraja¹,

Sriram²

2014

Archives of Civil Engineering

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The main objective of this investigation is to assess the feasibility of strengthening of corroded (damaged) square hollow steel tubular sections subjected to compression and to develop or predict the suitable wrapping scheme of fi bre reinforced polymer (FRP) to enhance the structural behaviour of it. For this study, compact mild steel tubes were used with the main variable being FRP characteristics. Carbon fi bre reinforced polymer (CFRP) fabrics was used as horizontal strips (lateral ties) with other parameters such as the number of layers and spacing of strips. Among fourteen specimens, six were externally bonded by CFRP strips having a constant width of 50mm with a spacing of 20mm and the remaining six were externally bonded by CFRP strips having a constant width of 70mm with a spacing of 20mm, two columns were unbonded. Experiments were undertaken until the failure of columns to fully understand the infl uence of FRP characteristics on the compressive behaviour of the square sections including their failure modes, axial stress-strain behaviour, enhancement in the load carrying capapcity, and effect of distribution of CFRP layers. Finally, the behaviour of externally bonded hollow tubular sections was compared with one another and also with the control specimens. Evaluation of the results will lead to optimum CFRP jacketing/ wrapping arrangements for the steel tubes considered here.

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Manufacturing and mechanical behavior of hybrid building materials

Papanicolaou

Lagas

Papadimitropoulos

et al. 2011

J of Applied Polymer Sci

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This work is an experimental investigation of the flexural properties of hybrid matrix composites reinforced with different types of reinforcement, namely short glass fibers, glass beads, and short steel fibers. The aim of this investigation is to determine the mechanical behavior and properties of the composites that were manufactured, as well as to define an optimum composition of the materials used that will result in a composite with enhanced mechanical performance for building applications.

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FRP materials for the rehabilitation of tubular steel structures, for underwater applications

Cited by 134 publications

References 11 publications

Utjecaji orijentacije slojeva CFRP traka na ojačanje šupljih čeličnih elemenata

Utjecaji orijentacije slojeva CFRP traka na ojačanje šupljih čeličnih elemenata

Investigation on Corroded Hss Tubular Members under Compression Strengthened with CFRP Composites

Manufacturing and mechanical behavior of hybrid building materials

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