Confinement Effectiveness of FRP in Retrofitting Circular Concrete Columns under Simulated Seismic Load

Dongsheng, Gu; Wu, Gang; Wu, Zhishen; Wu, Yufei

doi:10.1061/(asce)cc.1943-5614.0000105

Cited by 72 publications

(26 citation statements)

References 14 publications

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“…The energy dissipation capacity of retrofitted columns is influenced by FRP jacket confinement stiffness (Promis et al 2009, Gu et al 2010, the axial load ratio (Ozbakkaloglu and Saatcioglu 2007, Gu et al 2010, Zhou et al 2013a) and the aspect ratio of the column section (Ozbakkaloglu and Saatcioglu 2007, Gu et al 2010, Bui et al 2015. The improvement of the strength and ductility capacity by using FRP wrapping the full height of columns is not in proportion with that contributed from FRP wrapping in the potential plastic hinge locations (Parvin and Brighton 2014).…”

Section: Frp-strengthened Rc Columnsmentioning

confidence: 99%

“…An increase in energy dissipation due to FRP wrapping means an increase of ductility and thus increased sectional curvature capacity and inter-storey drift capacity , Gu et al 2010, Goksu et al 2012, Pantelides and Moran 2013, Parvin and Brighton 2014, because the drift capacity of columns is dominated by the plastic hinge length and the section curvature (Ozbakkaloglu and Saatcioglu 2007, Gu et al 2010, Parvin and Brighton 2014. FRP wrapping can also prevent buckling of longitudinal reinforcement, and reducing the damage in non-seismically designed RC columns , Gu et al 2010, Goksu et al 2012,Pantelides and Moran 2013, Parvin and Brighton 2014.…”

Section: Frp-strengthened Rc Columnsmentioning

confidence: 99%

“…FRP wrapping can also prevent buckling of longitudinal reinforcement, and reducing the damage in non-seismically designed RC columns , Gu et al 2010, Goksu et al 2012,Pantelides and Moran 2013, Parvin and Brighton 2014.…”

Section: Frp-strengthened Rc Columnsmentioning

confidence: 99%

See 2 more Smart Citations

A review of FRP strengthened concrete structures under extreme loading

Chen¹,

Xie

Tao

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Many concrete structures are vulnerable to extreme loadings such as accidental impact, terrorist attack and earthquake disasters. Retrofitting of existing concrete structures for enhanced performance under these loadings has been an important topic of research for a long time, especially since the 911 terrorist attack. Among the different retrofitting techniques, external bonding of fibre reinforced polymer (FRP) composites has been a popular one. This paper presents a brief review of recent research on FRP strengthened concrete structures under blast, impact, earthquake and cyclic loading.

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Section: Frp-strengthened Rc Columnsmentioning

confidence: 99%

Section: Frp-strengthened Rc Columnsmentioning

confidence: 99%

See 1 more Smart Citation

A review of FRP strengthened concrete structures under extreme loading

Chen¹,

Xie

Tao

et al. 2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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“…Numerous studies involve the FRP retrofit of deficient reinforced concrete columns for seismic loads [39][40][41][42][43][44][45][46][47][48][49]. The effects of the FRP reinforcement length on the plastic hinge region and the drift capacity of FRP-retrofitted columns has been investigated [39].…”

Section: Strengthening Of Columns Subjected To Seismic Loadsmentioning

confidence: 99%

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

2014

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This paper provides a review of some of the progress in the area of fiber reinforced polymers (FRP)-strengthening of columns for several loading scenarios including impact load. The addition of FRP materials to upgrade deficiencies or to strengthen structural components can save lives by preventing collapse, reduce the damage to infrastructure, and the need for their costly replacement. The retrofit with FRP materials with desirable properties provides an excellent replacement for traditional materials, such as steel jacket, to strengthen the reinforced concrete structural members. Existing studies have shown that the use of FRP materials restore or improve the column original design strength for possible axial, shear, or flexure and in some cases allow the structure to carry more load than it was designed for. The paper further concludes that there is a need for additional research for the columns under impact loading senarios. The compiled information prepares the ground work for further evaluation of FRP-strengthening of columns that are deficient in design or are in serious need for repair due to additional load or deterioration.

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“…Due to the economic consideration, mostly the latter will be chosen as it requires less time, cheaper, easier and most importantly, it is highly effective. Past research works have proven that rapid repairing using confinement is effective in restoring the original strength of the concrete columns [7][8][9][10]. Besides, it was also reported that the confinement restored the ductility of damaged concrete as well [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effects of Predamaged Level on Confined HSC Columns

et al. 2017

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Abstract. In the design of repair works for damaged concrete, an accurate and representative stress-strain model is of important. The stress-strain model for damaged high strength concrete (HSC) repaired with posttensioning steel straps confinement yet available, although the confining method has been proven to be effective in improving the performance of non-damaged HSC. A series of experimental test was carried out to investigate the stress-strain relationships of such concrete. A total of 24 HSC cylinders were compressed until certain damaged levels, then repaired by using steel straps. Two important parameters have been identified to have significant effects on the stress-strain relationship of such repaired concrete, namely the confining volumetric ratio and damaged levels. These parameters were incorporated into the development of stressstrain model, which later was shown to correlate well with the experimental results. This paper also has evidenced that existing stressstrain models of damaged concrete are not suitable to be directly applied to the design of repair works using post-tensioning steel straps confinement that produce external lateral stress on damaged columns before subsequent loading applied.

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Confinement Effectiveness of FRP in Retrofitting Circular Concrete Columns under Simulated Seismic Load

Cited by 72 publications

References 14 publications

A review of FRP strengthened concrete structures under extreme loading

A review of FRP strengthened concrete structures under extreme loading

FRP Composites Strengthening of Concrete Columns under Various Loading Conditions

Effects of Predamaged Level on Confined HSC Columns

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