Flexural performance of bamboo scrimber beams strengthened with fiber-reinforced polymer

Wei, Yang; Ji, Xuewei; Duan, Maojun; Li, Guofen

doi:10.1016/j.conbuildmat.2017.03.054

Cited by 125 publications

(59 citation statements)

References 31 publications

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“…For example, the failure position of Specimen 1-1 was at the third adhesive layer. However, Yang et al [21] presented a different failure process where slipping did not occur between the strengthening materials and the original bamboo beams prior to the rupturing of the bamboo plates where only 1~3 layers FRP were applied. The reason for the difference may be that as the thickness of CFRP increases, the interface becomes more prone to peeling off.…”

Section: Failure Modesmentioning

confidence: 99%

“…The results indicated that the deformation of the specimens were nonlinear when the stress of the outermost fibers exceeded the limit of compression resistance in the compression zone and the fibers at the bottom of the component were broken when the outermost fibers exceeded the limit of tensile strength in the tension zone. Yang et al [21] studied bamboo scrimber beams that were strengthened by fiber-reinforced polymer (FRP) composite sheets embedded in the internal tensile region with an additional bamboo plate. Four-point bending tests were conducted to determine the failure modes, the load-displacement relationship, the load carrying capacity and the flexural rigidity of reinforced bamboo scrimber beams.…”

Section: Introductionmentioning

confidence: 99%

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Flexural Performance of CFRP-Bamboo Scrimber Composite Beams

Wu¹,

Huang²,

Li³

2019

Journal of Renewable Materials

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This study presents a new structure made up of bamboo scrimber and carbon fiber reinforced polymer (CFRP) to address the low stiffness and strength of bamboo scrimbers. Three-point bending test and finite element model were conducted to study the failure mode, strain-displacement relationship, load-displacement relationship and relationships between strain distribution, contact pressure and deflection, and adhesive debonding. The results indicated that the flexural modulus and static flexural strength of the composite beams were effectively increased thanks to the CFRP sheets. The flexural modulus of the composite specimens were 2.33-2.94 times that of bamboo scrimber beams, and the flexural strength were 1.49-1.58 times that of bamboo scrimber beams. Adhesive debonding had a great influence on the strain distribution and deflection of the composite specimens. It was an important factor for the failure of the CFRP-bamboo scrimber composite specimens. According to the finite element simulation, the strain distribution, contact pressure and deflection also greatly changed with the adhesive debonding. After complete peeling, the deflection of the specimen was 3.09 times that of the unpeeled because it was no longer an integral beam.

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Section: Failure Modesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexural Performance of CFRP-Bamboo Scrimber Composite Beams

Wu¹,

Huang²,

Li³

2019

Journal of Renewable Materials

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“…During the forming processes of BS, there are many physical and chemical changes to bamboo cells, such as compressing, bonding, and densifying [1][2][3][4][5]. Compared with other bamboo composites, bamboo scrimber has comparatively higher raw material utilization rate because the bamboo bark has not been removed [6][7][8][9][10]. Therefore, bamboo scrimber has a desirable texture, high hardness, and longitudinal strength properties [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of the Performance of Two Kinds of Waterborne Coatings on Bamboo and Bamboo Scrimber

Liu

et al. 2019

Coatings

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For this paper, two kinds of waterborne coatings, polyurethane acrylate (PUA) and epoxy resin, were synthesized and then coated onto neat bamboo and bamboo scrimber (BS), respectively. The coating performance of the samples was investigated. The results showed that, for the two kinds of coatings, there was a chemical reaction occurring between both coatings and the substrates. The permeability with respect to bamboo was higher than that of BS, while that of the epoxy resin coating was better than PUA. However, the PUA film was smoother than epoxy resin. The epoxy resin coating on bamboo had the best adhesion, which was at a 1 level. The abrasion values of the four samples varied in the same substrate. A higher hardness of the coating film was obtained when coated with PUA. In general, the coating performance of bamboo scrimber was poorer than that of bamboo, either coated with PUA or epoxy resin. The epoxy resin had a better coating performance than PUA.

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“…However, the incompatible elastic moduli of steel and wood resulted in the signi cant deformation of the wood and large prestress loss [28]. e strengthening techniques for bamboo structures are not systematical and comprehensive compared with wood structures [29]. Wei et al conducted a series of tests to study the e ect of the steel bar and FRP sheet on the exural performance of the bamboo scrimber beams [29].…”

Section: Introductionmentioning

confidence: 99%

“…e strengthening techniques for bamboo structures are not systematical and comprehensive compared with wood structures [29]. Wei et al conducted a series of tests to study the e ect of the steel bar and FRP sheet on the exural performance of the bamboo scrimber beams [29]. Test results showed that the application of the ber-reinforced polymer can be e ective in improving the exural performance of bamboo beams.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Nonprestressed/Prestressed BFRP Bar on Flexural Performance of the Bamboo Beam

Ding

Liu

2019

Advances in Polymer Technology

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Until now, the systematical and comprehensive strengthening techniques have not been formed for the bamboo structure. Under such background, this paper aims to explore the e ects of the application of the nonprestressed and prestressed basalt ber-reinforced polymer (BFRP) bars on the exural performance of the beams made of the laminated bamboo and reconstituted bamboo materials. Two series of four-point bending tests were thus conducted. In the rst series of tests, the pure laminated bamboo beam and the laminated bamboo beam applied with nonprestressed BFRP bar were compared. Test results showed that the ultimate load and deformation capacity of the laminated bamboo beam was improved due to the existence of the BFRP bar. In the second series of tests, the reconstituted bamboo beams applied with nonprestressed and prestressed BFRP bars were compared. It is found that the ultimate load of the reconstituted bamboo beam was not improved by the application of the prestressed force. e further analysis related to the prestress loss demonstrated that the prestress loss before the release of the prestressed BFRP bar could reach up to 31.8-37.3% compared with the design initial prestressed stress. e prestress loss caused by the elastic deformation of the bamboo beam can be neglected. For all tested specimens, the plane section assumption was acceptable and the position of the neutral axis of the beam gradually moved down with the increase of the applied load.

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Flexural performance of bamboo scrimber beams strengthened with fiber-reinforced polymer

Cited by 125 publications

References 31 publications

Flexural Performance of CFRP-Bamboo Scrimber Composite Beams

Flexural Performance of CFRP-Bamboo Scrimber Composite Beams

A Comparison of the Performance of Two Kinds of Waterborne Coatings on Bamboo and Bamboo Scrimber

Effect of the Nonprestressed/Prestressed BFRP Bar on Flexural Performance of the Bamboo Beam

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