Seismic behavior of RC columns flexurally strengthened with FRP sheets and FRP anchors

Castillo, Enrique del Rey; Griffith, Michael; Ingham, Jason

doi:10.1016/j.compstruct.2018.07.029

Cited by 71 publications

(18 citation statements)

References 13 publications

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“…This proved that the adaption of the FRP anchors could provide adequate anchorage to assist the FRP strips to reach a higher material utilization. FRP anchors were also applied to the seismic strengthening of RC columns by del Rey Castillo et al., 85 and it was found that the anchors could connect the bonded FRP sheets to the concrete substrate, thus providing the continuity of the load path. Qazi 86 tested three specimens to study the seismic behavior of short RC shear walls.…”

Section: Anchorage Systems For Frp Laminatesmentioning

confidence: 99%

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Wang

Zhu

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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Fiber-reinforced polymer (FRP) composites have been widely used to strengthen the deteriorated reinforced concrete structures due to their outstanding characteristics of light weight, high strength, as well as noncorrosion. A successful strengthening with the FRP composites would equip the existing structures with the prominent improvement in terms of the durability, ductility, and bearing capacity. Current studies indicate that a simple and reliable anchorage system for the FRP composites will help improve the performance of the strengthened structures both efficiently and economically. Up till now, various anchorage systems have been developed for the FRP composites. Therefore, it is necessary to select appropriate anchorage systems according to different needs and establish relevant design specifications. In view of the aforementioned objectives, this paper systematically summarizes the anchoring mechanism of anchorage systems for two commonly used FRP products (FRP laminates and FRP bars) in different strengthened systems. Additionally, a state-of-the-art review as well as the advantages and disadvantages of each anchorage system are presented. Finally, shortcomings in the current state of knowledge and recommendations beneficial to further study are put forward.

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Section: Anchorage Systems For Frp Laminatesmentioning

confidence: 99%

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Wang

Zhu

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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show abstract

“…Castillo et al [47], on the other hand, used FRP anchors and a bond breaking layer with FRP sheets in order to overcome the debonding disadvantage of the FRP sheets in strengthening RC columns. It was observed that due to the inclusion of a novel bond breaking layer, the premature debonding of FRP sheet was prevented and the ductility of the column was enhanced.…”

Section: Cfrp Strengtheningmentioning

confidence: 99%

Strengthening and Repair of Reinforced Concrete Columns by Jacketing: State-of-the-Art Review

et al. 2019

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Sustainability necessitates the protection of infrastructure from any kind of deterioration over the life cycle of the asset. Deterioration in the capacity of reinforced concrete (RC) infrastructure (e.g., bridges, buildings, etc.) may result from localised damage sustained during extreme loading scenarios, such as earthquakes, hurricanes or tsunamis. In addition, factors such as the corrosion of rebars or ageing may also deteriorate or degrade the capacity of an RC column, thereby necessitating immediate strengthening to either extend or ensure its design life is not limited. The aim of this paper is to provide a state-of-the-art review of various strengthening and repair methods for RC columns proposed by different researchers in the last two decades. The scope of this review paper is limited to jacketing techniques for strengthening and/or repairing both normal- and high-strength RC columns. The paper also identifies potential research gaps and outlines the future direction of research into the strengthening and repair of RC columns.

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“…CFRP (Carbon Fiber-Reinforced Polymer) has been widely used in the reinforcement of civil engineering [ 1 , 2 ]. For concrete structures, remarkable results have been achieved, for example in bending reinforcement [ 3 ], shear reinforcement [ 4 ], seismic reinforcement [ 5 ], interfacial bond peeling study [ 6 ], material inspection methods [ 7 ] and durability research [ 8 ]. In recent years, CFRP has attracted more attention in relation to the strengthening and retrofitting of steel structures Compared with traditional technology, which mainly depends on welding [ 9 , 10 ], the CFRP strengthening steel structure has many advantages [ 11 , 12 ], such as a low density (about 1/4 of the steel density), high tensile properties (1000 to 5000 MPa for ordinary grade CFRP sheets), an excellent resistance to acid and alkali corrosion, a good fatigue resistance and a good creep relaxation resistance.…”

Section: Introductionmentioning

confidence: 99%

Study on the Interface Constitutive Relation between Carbon Fiber Fabric and Steel

et al. 2020

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Peeling failure at the interface is one of the main failure modes for CFRP (Carbon Fiber-Reinforced Polymer)-reinforced steel structures. However, there are very few reported studies on the bond-slip relationship at the CFRP-steel interface. A series of simple shear tests were carried out in the present paper. The influence of the fiber fabric’s width and thickness, the surface roughness of the steel sheet, and the thickness of the adhesive layer on the bonding performance of the CFRP fabric to steel interface was considered. The interface constitutive model and bonding strength model were further established under multiple factors. The results show that with the decrease of the surface roughness, the interface’ ultimate peeling load increases gradually, and the failure has a tendency to develop from a glue-steel interface to a glue-CFRP interface. The test pieces that were subjected to sand blasting obtained the peak value of the ultimate peeling load. This indicates that sand blasting can effectively enhance the interface bonding strength. The theoretical values obtained via the interface prediction model are consistent with the experimental values. This proves that the newly developed interface prediction model can effectively predict the local bonding slip and bonding strength of the interface.

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Seismic behavior of RC columns flexurally strengthened with FRP sheets and FRP anchors

Cited by 71 publications

References 13 publications

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Strengthening and Repair of Reinforced Concrete Columns by Jacketing: State-of-the-Art Review

Study on the Interface Constitutive Relation between Carbon Fiber Fabric and Steel

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