Upgrading steel–concrete composite girders and repair of damaged steel beams using bonded CFRP laminates

Fam, Amir; MacDougall, Colin; Shaat, Amr

doi:10.1016/j.tws.2008.10.014

Cited by 70 publications

(26 citation statements)

References 8 publications

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“…Some examples of this requirement for the assessment of damaged steel structures are presented by Mahin [1] on the damage to steel structures during the Northridge earthquake and Heneka et al [2] on the assessment of storm damage to buildings. Furthermore, Fam et al [3] state that forty percent of all steel bridges in the US are classified as structurally deficient or structurally obsolete and work to investigate damage events in shipping [4], indicate the need to be able to assess the residual strength of structures to allow upgrade and repair or to ensure safe operation.…”

Section: Introductionmentioning

confidence: 99%

Ultimate collapse strength assessment of damaged steel-plated structures

Underwood

Sobey

Blake

et al. 2012

Engineering Structures

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In an unpredictable world where human intervention or unexpected environmental conditions can prevail, damage can occur to manmade structures. Whilst structural design allows for redundancy, or a structural capability beyond the general working load of the structure, it is necessary to be able to analyse and understand the residual capability of a damaged structure to ensure the safety of personnel in the vicinity of the structure and assess the potential to facilitate repair.Idealised Structural Unit Method (ISUM) can allow rapid assessment of large structural arrangements by simplification into smaller constituent parts, which are assessed against pre-calculated failure data for each part. The method has potential benefits for allowing rapid assessment of damaged steelplated structure that would otherwise require the use of high fidelity modelling of the entire structures, such as through the use of finite element analysis. This paper presents a study on the use of ISUM to assess damaged steel-plated structures and its limitations through the collapse analysis of stiffened steel panels. A new ISUM is proposed for strength assessment of damaged structural arrangements. Analysis is undertaken to assess the effects of geometrical and material property variations that can occur in a structure as well as the effects of damage aperture size and shape on the collapse strength of stiffened steel panels. The study shows 2 that while ISUM can be applied in the assessment of damaged steel-plated structures, implementing the proposed new ISUM allows greater accuracy in the calculation of the collapse strength of damaged stiffened steel panels. The paper also concludes that the assessment of larger structural units for application in the ISUM assessment, will allow the effects of the damage on surrounding structure to be captured, which can influence the deflection shapes that will lead to collapse of the structure.

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Section: Introductionmentioning

confidence: 99%

Ultimate collapse strength assessment of damaged steel-plated structures

Underwood

Sobey

Blake

et al. 2012

Engineering Structures

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“…The load-carrying capacity of steel-concrete composite girders can be improved by epoxy bonding fiber reinforced polymers (FRP) laminates to its tension flange. Carbon fiber reinforced polymers (CFRP) have great potential for the strengthening and repair of steel bridge girders due to high strength to weight ratio, corrosion resistance and high fatigue properties [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of strengthened steel–concrete composite beams by various plating methods

Sallam

Badawy

Saba

et al. 2010

Journal of Constructional Steel Research

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“…Results demonstrated that bonding CFRP plates significantly increased the ultimate bearing capacity, while its effects on elastic response were relatively modest. Al-Saidy et al [6] reported obvious increases in post-elastic stiffness of strengthened beams through the use of high modulus CFRP, also confirmed by Fam et al [7] and Schnerch and Rizkalla [8].…”

Section: Introductionmentioning

confidence: 69%

Study of the Tensile Properties of CFRP Strengthened Steel Plates

et al. 2015

Polymers

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This paper presents the experimental results of steel plates strengthened with carbon fiber reinforced polymer (CFRP) sheets under tensile load. The number of CFRP layers (ranging from one to four), strengthening schemes (single-sided and double-sided bonding), and temperatures (ranging from 25 to 120˝C) were investigated. Results showed that the number of CFRP layers and strengthening schemes had insignificant effects on failure modes of specimens. The failure modes were dominated by the degradation of resin matrix at temperatures lower than T g + 10 or 20˝C, where T g is the glass transition temperature, and were dominated by the volume decrease of resin matrix at temperatures above that. Through bonding CFRP sheets, the ultimate load and post-elastic stiffness of specimens were significantly increased. However, the increase in the number of CFRP layers also led to the decrease in strengthening and stiffening efficiency. The double-sided strengthened specimens showed more preferable mechanical properties than the single-sided strengthened specimens. As temperature increased, significant decreases in ultimate load and post-elastic stiffness were observed. Analytical modeling to predict the mechanical properties at ambient and elevated temperatures were conducted, respectively. The modeling results were verified by the test data.

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Upgrading steel–concrete composite girders and repair of damaged steel beams using bonded CFRP laminates

Cited by 70 publications

References 8 publications

Ultimate collapse strength assessment of damaged steel-plated structures

Ultimate collapse strength assessment of damaged steel-plated structures

Flexural behavior of strengthened steel–concrete composite beams by various plating methods

Study of the Tensile Properties of CFRP Strengthened Steel Plates

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