Analysis of RC beams strengthened with mechanically fastened FRP (MF-FRP) strips

Bank, Lawrence C.; Arora, Deepali

doi:10.1016/j.compstruct.2005.12.001

Cited by 101 publications

(41 citation statements)

References 11 publications

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“…However, some other factors involved in the design for safety bonding, such as adhesion or bonding property, fabrication, economy, are involved in the materials selection. Although increasing the strength was not the main purpose of this study, analogous to the study of Wu and Sun [26], Bank and Arora [27], and Kim and Hefferman [28] it was proven that this externally bonding of the concrete elements can improve some other mechanical properties such as strength.…”

Section: Discussionmentioning

confidence: 53%

A design for de-fragmentation of concrete materials to decline the vulnerability in the reconstruction of houses

Shahnoori

Voorbij

2009

WIT Transactions on the Built Environment

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In an integrated building system optimization of the sub-systems and the segments is a key issue. Improving the structural elements and materials for a reconstruction after an earthquake is even more important than a normal construction. Because earthquakes annually cause big economic and human impacts on world's society such as losses of energy (causing depletion of natural resources in a large scale), efforts, and lives. With building destruction in seismic areas, the collapse of construction materials and their weight is the main reason for fatalities and severe injuries. Houses as the major inhabited buildings are the main subject of the collapse or damages in earthquakes. Thus, to guarantee the sustainability by an integrated design and a qualitative building system, appropriately materialization of houses is highly important in seismic areas. As the context of this study is a seismic desert city, it concentrates on increasing the efficiency of the building system in such an area. The main goal is declining the vulnerability of the inhabitants of a house by appropriately materialisation and designing for de-fragmentation.

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Section: Discussionmentioning

confidence: 53%

A design for de-fragmentation of concrete materials to decline the vulnerability in the reconstruction of houses

Shahnoori

Voorbij

2009

WIT Transactions on the Built Environment

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“…All the strengthened slabs were preliminarily designed to achieve a similar nominal flexural strength (Napoli, 2008) based on an existing simplified analytical procedure (Bank and Arora, 2007). The length of the FRP laminate in specimens MF-1-S and MF-2-S was selected as the minimum to attain the target nominal strength (Napoli, 2008).…”

Section: Mf-frp Strengthening Layout and Test Matrixmentioning

confidence: 99%

“…Simplified analytical models to predict the flexural response of MF-FRP strengthened RC members have been proposed (Bank and Arora, 2007;Lamanna, 2002) that rely on the assumption of conservation of plane Napoli et al…”

Section: Introductionmentioning

confidence: 99%

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

Napoli¹,

Matta²,

Martinelli³

et al. 2010

Magazine of Concrete Research

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Mechanically fastened fibre-reinforced polymer laminate systems are emerging as a promising means for the repair and strengthening of reinforced concrete members. This technology entails the use of pultruded carbon-and glassvinyl ester fibre-reinforced polymer laminates with enhanced longitudinal bearing strength that are connected to the concrete substrate by means of steel anchors. Attractive applications are those for emergency repairs where constructability and speed of installation are critical requirements. In this paper, an experimental investigation is first presented that included laboratory testing of scaled reinforced concrete slabs strengthened with four different combinations of laminate lengths and fastener layouts to study optimised strengthening configurations. Compelling evidence was gained on the influence of the partial interaction between reinforced concrete slabs and mechanically fastened fibre-reinforced polymer laminates on the flexural response arising predominantly from bearing of the fasteners on to the fibre-reinforced polymer laminate. A numerical study is presented where the proposed finiteelement procedure incorporates non-linear constitutive models for materials and the concrete-fibre-reinforced polymer interface. For the latter, an accurate and simplified, conservative bilinear stress-slip model is successfully implemented and verified to evaluate applicability for analysis and design purposes.

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“…This failure mode was consistent with available references, which indicated that the 2-ply EB-FRP could not be fully utilized due to the poor interfacial bond behaviour. 8,13,16,24,25 Experimental results showed that this failure mode could be changed when IHB-FRP or SPHB-FRP technique was adopted in some cases. As shown in Table 1 For the beams failed due to the rupture of CFRP, the MFs remained in good condition until the CFRP fractured.…”

Section: Failure Modesmentioning

confidence: 96%

“…Spadea et al 7 adopted spaced Ushaped external steel anchors to fasten FRP strips throughout the span of the strengthened beam and found that the ultimate capacity and ductility increased significantly with this approach. Bank and Arora, 8 Martin and Lamanna 9 and Lee et al 10 adopted the powder-actuated fasteners, expansion anchors or bolts installed along the entire beam span to prevent the FRP strips from debonding. The influence of some factors on the strengthening effect, such as the diameter, alignment and spacing of the bolt, were investigated in their researches.…”

Section: Introductionmentioning

confidence: 99%

An approach of steel plate hybrid bonding technique to externally bonded fibre-reinforced polymer strengthening system

Zhang

Cheng

2018

International Journal of Distributed Sensor Networks

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The strengthening efficiency of externally bonded fibre-reinforced polymer to concrete structure is usually limited owing to the unexpected debonding of fibre-reinforced polymer laminates. In this study, a new steel plate hybrid bonding technique was developed to supply additional anchorage for traditional externally bonded fibre-reinforced polymer strengthening system. With this approach, the fibre-reinforced polymer debonding can be effectively prevented. Moreover, the stress concentration, which probably results in a premature fracture of fibre-reinforced polymer laminates as that performed for available hybrid bonding anchorage techniques, can be eliminated by introducing a steel plate between the mechanical fasteners and fibre-reinforced polymer strips. To verify the effect of this new method, 21 carbon fibrereinforced polymer-strengthened beams were studied on the flexural behaviours. Test results showed that, compared to available hybrid bonding anchorage techniques, steel plate hybrid bonding is more capable of making the full use of fibre-reinforced polymer laminates and further enhance the ultimate capacity and ductility of externally bonded fibrereinforced polymer-strengthened beams. Based on the experimental results, the effect of interfacial treatment, ply of carbon fibre-reinforced polymer and mechanical fastener spacing on the failure mode and ultimate load ratio were discussed. Eventually, a simplified analytical procedure was proposed and verified to estimate the flexural resistance of steel plate hybrid bonding -fibre-reinforced polymer-strengthened beam.

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Analysis of RC beams strengthened with mechanically fastened FRP (MF-FRP) strips

Cited by 101 publications

References 11 publications

A design for de-fragmentation of concrete materials to decline the vulnerability in the reconstruction of houses

A design for de-fragmentation of concrete materials to decline the vulnerability in the reconstruction of houses

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

An approach of steel plate hybrid bonding technique to externally bonded fibre-reinforced polymer strengthening system

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