Repair and rehabilitation of concrete structures using confinement: A review

Khun, Chau; Apandi, Nazirah Mohd; Sofrie, Chin Siew Yung; Ng, Jen Hau; Lo, Wen Haur; Awang, Abdullah Zawawi; Omar, Wahid

doi:10.1016/j.conbuildmat.2016.12.100

Cited by 101 publications

(29 citation statements)

References 57 publications

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“…Lately, there has been a large increase in FRP composite use in civil engineering applications to repair and retrofit existing structures, particularly concrete and masonry buildings and bridges [23,24]. FR composites (FRP composites specifically) have been used in infrastructure applications to repair and retrofit new support structures, build light weight bridge decks, and provide corrosion-resistant internal reinforcement [12,18,23,25,26]. FR composites have several advantages over traditional reinforcement/strengthening materials which include high load capacities, light weight, and corrosion resistance.…”

Section: Background On Fr Compositesmentioning

confidence: 99%

“…External confinement of a column is necessary when a structure is damaged or needs to be upgraded. External confinement can restore or increase the load-carrying capacity, ductility, and energy absorption capacity of the component [23,61]. The effectiveness of FRP wrap confinement is reduced for columns with square or rectangular cross-sections, because the confining pressure is not uniform and is concentrated in the corners.…”

Section: Laboratory Testingmentioning

confidence: 99%

“…The information provided in this section helps to identify research needs that exist in the literature.2.3.3.1. Initial Performance Improvement of FRP Composite Retrofitted Structures Experimental StudiesThere have been several experimental studies in the last few decades on the enhancements that externally bonded FRP composites can impart on a structure[23,146,147]. These studies showed that application of FRP composites can provide performance improvements including enhanced confinement, load-bearing capacity, blast resistance, and shear resistance, depending on the application to the component.…”

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confidence: 99%

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Research needs concerning the performance of fiber reinforced (FR) composite retrofit systems for buildings and infrastructure

Goodwin¹,

Sattar²,

Dukes³

et al. 2019

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NIST acknowledges the extensive input and support of the following subject matter experts: James Jirsa, Bret Lizundia, William Gold, Charles Bakis, and John Myers. Their contributions, diversity of perspectives, critical input, and help facilitating the workshop are much appreciated. Workshop participants are thanked for their valuable feedback and input on the research needs for FR composite retrofitted building performance. NIST also thanks

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Section: Background On Fr Compositesmentioning

confidence: 99%

Section: Laboratory Testingmentioning

confidence: 99%

mentioning

confidence: 99%

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Research needs concerning the performance of fiber reinforced (FR) composite retrofit systems for buildings and infrastructure

Goodwin¹,

Sattar²,

Dukes³

et al. 2019

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“…A popular retrofitting technique for deficient RC members of existing structural systems is RC jacketing. Several investigations have reported the merits of traditional RC jackets for increasing load bearing capacity and stiffness, and efficiently improving the overall structural performance [6][7][8][9]. However, apparent shortcomings of thick and heavily reinforced jackets constructed with common cast-in-place concrete caused this retrofitting method to lose ground [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Repair of Heavily Damaged RC Beams Failing in Shear Using U-Shaped Mortar Jackets

et al. 2019

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The effectiveness of slightly reinforced thin U-shaped cementitious mortar jacketing for the repair of damaged shear-critical reinforced concrete beams is experimentally investigated. The test project includes two parts. In the first one, five concrete beams over-reinforced against flexure and under-reinforced against shear with different ratio of closed stirrups were initially subjected to monotonic loading until failure. The initially tested beams have been designed to fail in shear after wide diagonal cracking and to exhibit various strength and deformation capacities along with different levels of damages. In the second experimental part, the heavily damaged beams were jacketed with mild steel small diameter U-shaped transverse stirrups and longitudinal reinforcing bars. The retrofitted specimens using the proposed jacketing technique were tested again following the same four-point-bending load scheme. Based on the overall performance of the beams, it is deduced that the shear strength and deformation capability of the jacketed beams were substantially increased compared to the corresponding capacities of the initial beams. Further, although all beams failed in a shear abrupt manner, the retrofitted ones exhibited reduced brittleness and higher deflections at failure up to six times with respect to the initially tested specimens. The level of the initial damage influences the efficiency of the jacketing. Additional test data derived from relative shear-damaged beam specimens and retrofitted with similar thin jackets is also presented herein in order to establish the effectiveness of this repair system and to clarify the parameters affecting its structural reliability. Comparisons indicated that jacketed beams can alter the failure mode from brittle shear to ductile flexural under certain circumstances.

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“…Apesar disso, problemas relacionados à resistência e durabilidade do material não são raros e impõem elevados custos em sua reparação no mundo inteiro [9]. Em muitos locais, os aportes financeiros gastos com a recuperação de estruturas de concreto são maiores do que aqueles utilizados na construção de novas edificações [10].…”

Section: Introductionunclassified

Abrasão superficial de concretos contendo cinza volante em substituição parcial ao cimento Portland

Witzke

Correia

Medeiros

2019

Simpósio Paranaense De Patologia Das Construções

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O presente artigo tem por objetivo investigar a abrasão superficial e a resistência à compressão de concretos contendo cinza volante. Foi utilizado um planejamento fatorial fracionado para o desenvolvimento do trabalho, englobando nove misturas com diferentes relações água/aglomerante (A/A: 0,28; 0,33 e 0,40), agregado/aglomerante (AG/A: 2,70; 3,10 e 3,70) e teores de substituição de cimento Portland por cinza volante (TC:10, 20 e 30%). Foram testadas a resistência à compressão aos 28 dias de cura (RC28) , bem como a resistência à abrasão superficial dos concretos (RAS). Os resultados mostraram que é possível se obter concretos com cinza volante com alta resistência à compressão e perda mínima do desgaste abrasivo. Dessa forma, o uso de cinza volante em concretos pode ser uma alternativa para a substituição parcial do cimento Portland, do ponto de vista das propriedades estudadas.

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Repair and rehabilitation of concrete structures using confinement: A review

Cited by 101 publications

References 57 publications

Research needs concerning the performance of fiber reinforced (FR) composite retrofit systems for buildings and infrastructure

Research needs concerning the performance of fiber reinforced (FR) composite retrofit systems for buildings and infrastructure

Repair of Heavily Damaged RC Beams Failing in Shear Using U-Shaped Mortar Jackets

Abrasão superficial de concretos contendo cinza volante em substituição parcial ao cimento Portland

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