Buckling strength of slender circular tubular steel braces strengthened by CFRP

Gao, Xiaofang; Balendra, T.; Koh, C. G.

doi:10.1016/j.engstruct.2012.08.010

Cited by 64 publications

(18 citation statements)

References 10 publications

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“…It indicates that the strengthening method of longitudinal layers is the most effective, whereas the other two methods can merely increase the ultimate capacity by less than 10% (transverse layers followed by longitudinal ones and transverse layers only). The reinforcement effect of transverse layers on SHS columns was found in this paper to be different from the conclusions given in the research (Gao et al 2013) that the transverse layers have a better reinforcement effect on CHS columns.…”

Section: Experimental Analysiscontrasting

confidence: 55%

“…It was found that the longitudinal CFRP layers provided better confinement for slender specimens, whereas the transverse direction perpendicular to the longitudinal fibers was the optimum for stub tubular columns (Shatt and Fam 2006). For CHS tubular columns, it was found that the relationship between the number of layers and the ultimate capacity was proportional (Gao 2013).…”

Section: Introductionmentioning

confidence: 99%

“…However, there is quite limited research on retrofitting steel structures using CFRP sheets. Most of scholars in this field focused on slender and stub tubular columns strengthened by composite fibers (Shatt and Fam 2006;Bambach 2009;Gao 2013), and different shapes of cross section including square hollow section (SHS) and circular hollow section (CHS) (Haedir and Zhao 2011;Sundarraja et al 2014). It was found that the longitudinal CFRP layers provided better confinement for slender specimens, whereas the transverse direction perpendicular to the longitudinal fibers was the optimum for stub tubular columns (Shatt and Fam 2006).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study on behaviour of retrofitted square hollow section slender columns under axial compression

Hai-ying¹,

Zhu²,

Ruan³

2015

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

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An experimental investigation was conducted in this study on axially loaded square hollow section (SHS) slender columns retrofitted by carbon fiber reinforced polymer (CFRP). A total of seven specimens with identical cross section dimensions and raw material properties were compressed between pinned ends to identify the influence of the CFRP, in which six specimens were retrofitted by the CFRP. The effects of many influential factors including different layers of the CFRP, retrofitting directions of the CFRP and retrofitting sequences of the CFRP on the behaviour of the CFRP strengthened SHS slender columns were carefully evaluated. The column strengths obtained from the experimental investigation are compared with the design strengths calculated using the design equations given in the British Standard (CIRIA) and the equations modified based on the section conversion method proposed by Canadian Standard (CAN/CSA-S16-01). It is shown from the comparison that the ultimate strengths of the SHS slender columns were enhanced by retrofitting with the CFRP. The retrofitting directions of the CFRP in the longitudinal directions were found to have a great influence on the ultimate strengths of the CFRP strengthened SHS slender columns. Furthermore, a correction factor (βc) is proposed in this paper for the stability of the CFRP retrofitted SHS slender columns under axial compression. KEYWORDSCarbon fiber reinforced polymer (CFRP), square hollow section (SHS), retrofitted slender column, axial compression, section conversion method.

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Section: Experimental Analysiscontrasting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study on behaviour of retrofitted square hollow section slender columns under axial compression

Hai-ying¹,

Zhu²,

Ruan³

2015

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

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“…Fibre Reinforced Polymer (FRP) composites have been widely used for strengthening and rehabilitation of different structures such as steel structures [1][2][3][4], concrete structures [5,6] and masonry structures [7,8]. Owing to FRP high strength, lightweight and tailor-ability, they can be used for flexural and shear reinforcement of beams [9][10][11][12], strengthening of columns through external confinement [6] and prevention of the local buckling of thin-walled A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 3 structures [13].…”

Section: Introductionmentioning

confidence: 99%

Optimizing the degree of carbon nanotube dispersion in a solvent for producing reinforced epoxy matrices

et al. 2015

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“…Recently a number of experimental tests and numerical analyses have been conducted to evaluate the performance of CFRP strengthened steel structures. Since last decade, extensive studies have been conducted to understand the static behaviour of CFRP strengthened steel members subjected to static loading and the findings are well documented in several research articles [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Numerical studies on CFRP strengthened steel columns under transverse impact

Alam

Fawzia

2015

Composite Structures

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a b s t r a c tStrengthening of metallic structures using carbon fibre reinforced polymer (CFRP) has become a smart strengthening option over the conventional strengthening method. Transverse impact loading due to accidental vehicular collision can lead to the failure of existing steel hollow tubular columns. However, knowledge is very limited on the behaviour of CFRP strengthened steel members under dynamic impact loading condition. This paper deals with the numerical simulation of CFRP strengthened square hollow section (SHS) steel columns under transverse impact loading to predict the behaviour and failure modes. The transverse impact loading is simulated using finite element (FE) analysis based on numerical approach. The accuracy of the FE modelling is ensured by comparing the predicted results with available experimental tests. The effects of impact velocity, impact mass, support condition, axial loading and CFRP thickness are examined through detail parametric study. The impact simulation results indicate that the strengthening technique shows an improved impact resistance capacity by reducing lateral displacement of the strengthened column about 58% compared to the bare steel column. Axial loading plays an important role on the failure behaviour of tubular column.

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Buckling strength of slender circular tubular steel braces strengthened by CFRP

Cited by 64 publications

References 10 publications

Experimental study on behaviour of retrofitted square hollow section slender columns under axial compression

Experimental study on behaviour of retrofitted square hollow section slender columns under axial compression

Optimizing the degree of carbon nanotube dispersion in a solvent for producing reinforced epoxy matrices

Numerical studies on CFRP strengthened steel columns under transverse impact

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