Experimental and theoretical investigation of steel-reinforced bamboo scrimber beams

Wei, Yang; Yan, Shaocong; Zhao, Kang; Dong, Fenghui; Li, Guofen

doi:10.1016/j.engstruct.2020.111179

Cited by 72 publications

(19 citation statements)

References 45 publications

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“…Because of no similar research on other forms of prestressed continuous beams, there is no direct comparison. Nevertheless, based on former research [28,29,35], compared with Glulam beams, the bearing capacity of the continuous prestressed beams can be increased by 106.4% to 652.4%, and the bearing capacity of other types of prestressed Glulam beams was increased by 28.5% to 28.8% [21,26]. erefore, compared with other types of prestressed beams, the prestressed continuous beam proposed is more effective and feasible.…”

Section: Contrastive Analysis Of Continuous Beams and Simply Supported Beamsmentioning

confidence: 99%

“…e use of prestress for structural strengthening of timber structures was detailedly assessed, and then prestress was used to strengthen the mechanical properties of the Glulam beams [20][21][22][23][24][25][26][27][28][29]. Wei et al [21] proposed a novel steel-reinforced PBSL beam in which steel bars or prestressed steel bars were embedded in bamboo-composite beams. e result showed that the ultimate bearing capacity of the reinforced beams increases with an increasing reinforcement ratio and prestress, but the influence of the prestress was inferior to that of the diameter of the reinforced bars.…”

Section: Introductionmentioning

confidence: 99%

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Bending Performance of Prestressed Continuous Glulam Beams

Guo

et al. 2021

Advances in Civil Engineering

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The limited transferring moment capability of Glulam (glued laminated wood) joints results in insufficient joint stiffness. Therefore, most of the connections are hinged joints. Based on the previous studies, one novel end-connection device was proposed to form prestressed continuous Glulam beams. The prestressed beams were composed of prestressed low-relaxation steel bars, the deviator block, the anchorage device, and the novel end-connection apparatus. These prestressed steel bars were tensioned by the deviator block to exert prestress. Then, 18 prestressed continuous beams and two prestressed simply supported beams were subject to the bending tests to explore the impact of reinforcement ratio and prestress on the prestressed Glulam beams from aspects such as failure modes, bearing capacity, load-deflection relationship, and load-strain relationship. The results show that, given the same prestress level, compared with beams with a reinforcement ratio of 1.92%, the bearing capacity of beams with a reinforcement ratio of 3.84% and 5.76% is increased by 20.3%–29.4% and 30.51%–36.36%, respectively. Given the same reinforcement ratios, compared with beams without prestressing, the bearing capacity of beams with a prestressing force of 7 kN and 14 kN is increased by 2.39%–10.14% and 6.49%–13.26%, respectively. In addition, compared with simply supported beams, the bearing capacity of continuous beams is increased by 40%, and the deformation is reduced by 13%. Therefore, as a novel prestressed beam, the bending performance of Glulam beams can be improved effectively.

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Section: Contrastive Analysis Of Continuous Beams and Simply Supported Beamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending Performance of Prestressed Continuous Glulam Beams

Guo

et al. 2021

Advances in Civil Engineering

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“…However, the serviceability limit of flexural members is determined by deformation rather than strength in most cases. The bamboo flexural members have the defects of insufficient bearing capacity, low section stiffness, and insufficient spanning capacity (Chen et al, 2020a;Chen et al, 2020b;Wei et al, 2020b), which is similar to the wood flexural members. To enhance the flexural performance, the wood-concrete composite structure was proposed.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Mechanical Behavior of Bamboo-Concrete Connections and Wood-Concrete Connections

et al. 2020

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To investigate the similarities and differences of mechanical behavior between the bamboo-concrete connections and the wood-concrete connections, thirty-six specimens were tested through push-out tests with the material type (bamboo or wood), concrete strength and dowel diameter as test parameters. In addition to the linear variable displacement transducer the digital image correlation was also used to obtain the slip distribution of the whole field of the specimens, which was conducive to the further detailed analysis of the slip distribution and a comprehensive understanding of the load-slip relationship. The results showed that the failure modes of the bamboo-concrete connections were similar to that of the wood-concrete connections, such as the concrete failure near the joint and the dowels bending in different degrees. The load-slip curves of the two kinds of connections were similar, which could be summarized as the elastic section, strengthening section and descending section. The shear stiffness and capacity of bamboo-concrete connections were higher than that of wood-concrete connections, and the shear capacity increased with the increase of dowel diameter and concrete strength. The slip distribution of the left and right sides of the specimen was basically identical. The load-transfer performance of the dowel was excellent. Finally, the prediction method of shear capacity and load-slip curve model of composite connections were proposed and verified to be effective.

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“…Natural fibres from plants including jute, sisal, kenaf, ramie, flax and bamboo have already been developed as load-carrying composite materials. [9][10][11][12] Bamboo fibre materials have received increasing attention for their high strength, biodegradation and carbon sequestration from the atmosphere. 15,[13][14][15][16][17][18][19][20][21][22][23] Moreover, bamboo is highly renewable with perfect environmental sustainability -it is a type of grass that is the fastest growing plant currently known -and bamboo stalks reach maturity in 8 years.…”

Section: Introductionmentioning

confidence: 99%

Stress–strain relationship model of glulam bamboo under axial loading

Wei

Zhou

Zhao

et al. 2020

Advanced Composites Letters

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Glulam bamboo has been preliminarily explored for use as a structural building material, and its stress–strain model under axial loading has a fundamental role in the analysis of bamboo components. To study the tension and compression behaviour of glulam bamboo, the bamboo scrimber and laminated bamboo as two kinds of typical glulam bamboo materials were tested under axial loading. Their mechanical behaviour and failure modes were investigated. The results showed that the bamboo scrimber and laminated bamboo have similar failure modes. For tensile failure, bamboo fibres were ruptured with sawtooth failure surfaces shown as brittle failure; for compression failure, the two modes of compression are buckling and compression shear failure. The stress–strain relationship curves of the bamboo scrimber and laminated bamboo are also similar. The tensile stress–strain curves showed a linear relationship, and the compressive stress–strain curves can be divided into three stages: elastic, elastoplastic and post-yield. Based on the test results, the stress–strain model was proposed for glulam bamboo, in which a linear equation was used to describe the tensile stress–strain relationship and the Richard–Abbott model was employed to model the compressive stress–strain relationship. A comparison with the experimental results shows that the predicted results are in good agreement with the experimental curves.

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Experimental and theoretical investigation of steel-reinforced bamboo scrimber beams

Cited by 72 publications

References 45 publications

Bending Performance of Prestressed Continuous Glulam Beams

Bending Performance of Prestressed Continuous Glulam Beams

Comparative Study on Mechanical Behavior of Bamboo-Concrete Connections and Wood-Concrete Connections

Stress–strain relationship model of glulam bamboo under axial loading

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