Strengthening fire-damaged concrete by confinement with fibre-reinforced polymer wraps

Bisby, Luke; Chen, Jian Fei; Li, S.Q.; Stratford, Tim; Cueva, N.; Crossling, K.

doi:10.1016/j.engstruct.2011.07.002

Cited by 117 publications

(90 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reason can be related to the fact that the ductility effectiveness parameter depends on the area under the axial stress-axial strain curve. Several researchers [29][30][31][32][33][34][35] investigated the axial strain through a photographic method known as the digital image correlation technique. This technique functions by capturing various images at selected time intervals during the experimental testing.…”

Section: Ductility Effectivenessmentioning

confidence: 99%

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Abd-Elrahman

El‐Hacha

2014

Polymers

View full text Add to dashboard Cite

Abstract:Recently, steel fibre reinforced polymers (SFRP) sheets have been introduced for the repair and rehabilitation of concrete structures. Few researchers studied the behaviour of the concrete columns wrapped with SFRP sheets; however, several critical parameters such as the cost and ductility effectiveness of the SFRP wrapped concrete columns have been lightly addressed. Thus, the main objective of this paper is to study the cost and ductility effectiveness of SFRP wrapped concrete columns and compare the results with the conventionally used carbon FRP (CFRP) wrapped concrete columns. In addition, an analytical procedure to predict the cost effectiveness of SFRP wrapped concrete columns is also suggested, from which, a parametric study was conducted. The parametric study investigated the effect of the concrete strength, the number of SFRP layers, and the size and slenderness effects on the cost effectiveness of the concrete columns wrapped with SFRP sheets. The results from the cost and ductility effectiveness study indicated that the SFRP wrapped concrete columns showed enhanced performance over the CFRP wrapped concrete columns. The suggested analytical procedure proved to be a reliable and accurate method to predict the cost effectiveness parameter of SFRP wrapped concrete columns. The parametric study showed the significant impact of the investigated parameters on the cost effectiveness of concrete columns wrapped with SFRP sheets.

show abstract

Section: Ductility Effectivenessmentioning

confidence: 99%

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Abd-Elrahman

El‐Hacha

2014

Polymers

View full text Add to dashboard Cite

show abstract

“…FRP has also been used to strengthen post fire exposed concrete specimen [5]. Bisby et al [5] suggested that the use of FRP in post fire exposed specimens would significantly increase (above 100 %) the compressive strength of the specimens.…”

Section: Introductionmentioning

confidence: 99%

“…Bisby et al [5] suggested that the use of FRP in post fire exposed specimens would significantly increase (above 100 %) the compressive strength of the specimens. The model to estimate the compressive strength applies two assumptions: (1) the total increase in the ultimate stress is the same for the fire exposed and non-fire exposed concrete; and (2) the total increase in the ultimate axial strain between the strain at peak unconfined stress and the strain at peak FRPconfined stress is the same for the fire exposed and non-fire exposed concrete [5].…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength of Post Fire Exposed Concrete Column Wrapped with Fiber Reinforced Polymer

Wardaya¹,

Sugiharto²,

Pudjisuryadi³

2017

ced

View full text Add to dashboard Cite

Abstract:In this study, behaviour of reinforced concrete columns strengthened using fiber reinforced polymer (FRP; glass fiber and carbon fiber) after fire exposure are discussed. After being exposed to fire as high as 720 o C for 180 minutes, the specimens showed concrete and reinforcement strength degradation, even though there was no carbonation. It was found that specimens wrapped by carbon fiber showed better compressive strength but less ductility compared to specimens wrapped by glass fiber. It was also found that the low initial compressive strength did not decrease FRP confinement effectiveness. Increase of wrapped concrete compressive strength was evident despite the low initial strength (<17 MPa). Strength estimation using ACI 440.2R-08 formula, which is originally for wrapped plain concrete without fire heat exposure, underestimated the compressive strength. In the proposed formula, the initial compressive strength (f'co) should be adjusted by considering the modulus elasticity and strain limitation to have more precise estimation.

show abstract

“…As such, the numerous applications of FRP composites in repairing reinforced concrete (RC) structural elements have been widely investigated over the past three decades. Very few experimental investigations have recently examined the potential of using FRP composites to repair heatdamaged RC columns Bailey 2011a, b, 2012;Yaqub et al 2011Bisby et al 2011;Bailey and Yaqub 2012;Tahir et al 2013;Al-Nimry et al 2013;Roy et al 2014Roy et al , 2016Al-Kamaki et al 2015). Most of the test columns were unstressed during heating, cooling and testing despite the fact that columns are expected to be stressed up to 50% of their capacity during any fire incident.…”

Section: Introductionmentioning

confidence: 99%

“…To this end, Al-Kamaki et al (2015) applied an axial compressive loading of 30% of the maximum compressive strength at ambient temperature while exposing the test columns to elevated temperatures. Available research results Bailey 2011a, b, 2012;Yaqub et al 2011Bisby et al 2011;Bailey and Yaqub 2012;Tahir et al 2013;Al-Nimry et al 2013;Roy et al 2014Roy et al , 2016Al-Kamaki et al 2015) indicated that jacketing heat-damaged columns with unidirectional FRP sheets may, depending on the cross sectional shape, restore the axial strength of the columns. FRP jacketing has been found efficient in enhancing the ductility, deformation and energy dissipation capacities of heat-damaged columns.…”

Section: Introductionmentioning

confidence: 99%

FRP Confinement of Heat-Damaged Circular RC Columns

Al-Nimry

Ghanem

2017

Int J Concr Struct Mater

View full text Add to dashboard Cite

To investigate the effectiveness of using fiber reinforced polymer (FRP) sheets in confining heat-damaged columns, 15 circular RC column specimens were tested under axial compression. The effects of heating duration, stiffness and thickness of the FRP wrapping sheets were examined. Two specimen groups, six each, were subjected to elevated temperatures of 500°C for 2 and 3 h, respectively. Eight of the heat-damaged specimens were wrapped with unidirectional carbon and glass FRP sheets. Test results confirmed that elevated temperatures adversely affect the axial load resistance and stiffness of the columns while increasing their ductility and toughness. Full wrapping with FRP sheets increased the axial load capacity and toughness of the damaged columns. A single layer of the carbon sheets managed to restore the original axial resistance of the columns heated for 2 h yet, two layers were needed to restore the axial resistance of columns heated for 3 h. Glass FRP sheets were found to be less effective; using two layers of glass sheets managed to restore the axial load carrying capacity of columns heated for 2 h only. Confining the heatdamaged columns with FRP circumferential wraps failed in recovering the original axial stiffness of the columns. Test results confirmed that FRP-confining models adopted by international design guidelines should address the increased confinement efficiency in heat-damaged circular RC columns.

show abstract

Strengthening fire-damaged concrete by confinement with fibre-reinforced polymer wraps

Cited by 117 publications

References 10 publications

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Compressive Strength of Post Fire Exposed Concrete Column Wrapped with Fiber Reinforced Polymer

FRP Confinement of Heat-Damaged Circular RC Columns

Contact Info

Product

Resources

About