Lightweight timber I-beams reinforced by composite materials

Ghazijahani, Tohid Ghanbari; Russo, Thomas; Valipour, Hamid

doi:10.1016/j.compstruct.2019.111579

Cited by 41 publications

(13 citation statements)

References 41 publications

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“…In Hartig et. al [21], continuous damage mechanics [22][23][24][25][26] was employed to model a vehicle impact on moulded wooden tubes. The model predicted well both the observed failure modes, and the acceleration and velocity versus time relationships of the vehicle after impact.…”

Section: Generalmentioning

confidence: 99%

Veneer-based timber circular hollow section beams: Behaviour, modelling and design

Gilbert

Dias-da-Costa

Lebée

et al. 2020

Construction and Building Materials

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Various forms of timber hollow structural profiles have either been proposed in the literature or are already commercially available. Tests performed on Circular Hollow Section (CHS) beams showed failure modes not usually encountered in timber structures. For relatively thin-walled profiles, a sudden failure in the compression zone, with the opening of the cross-section, was observed. To confidently use and market CHS timber products, design rules considering all possible failure modes must be developed. This paper presents a Finite Element (FE) model of CHS timber beams which captures all experimentally observed failure modes. Cohesive zone elements were used to model the quasi-brittle failure modes of the timber material. The model was validated against ten experimental tests performed on CHS of three different cross-sectional slenderness and manufactured from juvenile hardwood Gympie messmate (Eucalyptus cloeziana) rotary peeled veneers. The model was found to accurately capture the measured structural behaviour and resulted in an average experimental-to-predicted bending capacity ratio of 1.02. The model was also used to explain the mechanisms leading to the sudden compressive failure mode. A parametric study was finally performed on 72 CHS beams of different cross-sectional slenderness. Results showed a strong correlation between the cross-sectional slenderness ratio and section capacity. Design rules are proposed and discussed.

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Section: Generalmentioning

confidence: 99%

Veneer-based timber circular hollow section beams: Behaviour, modelling and design

Gilbert

Dias-da-Costa

Lebée

et al. 2020

Construction and Building Materials

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“…When bamboo scrimber is used as a flexural member, it has the disadvantages of insufficient bearing capacity, low bending rigidity, and weak spanning ability similar to that of wood (Kumar et al, 2016;Li et al, 2018b;Yu et al, 2017;Zhou et al, 2021). The reinforcement method of wood bending members has been developed by many researchers, and various materials, such as steel (De Luca and Marano, 2012), fiber composite materials (Borri and Corradi, 2011;D'Ambrisi et al, 2014;Donadon et al, 2020;Dourado et al, 2012;Ghanbari-Ghazijahani et al, 2020), and bamboo (Chen et al, 2021c), have been explored for the reinforcement. For instance, Glišović (2015) and Hoseinpour et al (2018) glued fibre-reinforced polymer (FRP) on the bottom of the glulam beam to study the effect of FRP on the bending performance of the glulam beam.…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

Zhao

Wei

Yan

et al. 2021

Advances in Structural Engineering

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The embedding of steel bars is proposed to enhance the load-bearing performance of bamboo beams. Based on laboratory tests, the bending behavior of bamboo beams reinforced with steel bars or prestressed steel bars was analyzed using finite element software. Comparing the finite element simulation results with those measured in tests, it can be found that the load–displacement curves coincide with each other, and the strain development processes in the mid-span are basically the same. The prediction by the finite element simulation has good accuracy. The embedding of steel bars and prestressed steel bars can effectively improve the ultimate bearing capacity (up to 27.0%), bending stiffness at the serviceability limit state (up to 42.61%), ductility (up to 22.9%), and material utilization efficiency (up to 34.1%) for the bamboo beams. The embedding of steel bars makes the bamboo in the compression zone of the beams develop with higher efficiency, and applying the prestress for steel bars can produce reverse bending deformation and reduce the actual deflection for the reinforced bamboo beam under service load. Under the same reinforcement ratio, the prestress level has a relatively small influence on the ultimate bearing capacity (up to 4.5%) and stiffness (up to 4.5%) of the reinforced beam.

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“…e research results show that the composite beam undergoes brittle failure in the case of simple screw connection and simple viscose connection interface, and the load bearing capacity of the interface is effectively improved in the case of screw and viscose mixed connection. Ghazijahani et al [20] and others conducted experiments on light wood I-beams reinforced with composite materials. rough experiments and numerical methods, the bending and shear strength of lightweight composite wood I-beams are studied in order to use composite materials to strengthen I-beams and improve structural performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Bending Behavior of Steel‐Wood Composite Beams

Duan

Zhou

Liu

et al. 2021

Advances in Civil Engineering

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This paper proposes a steel-wood composite beam with H-shaped steel beam webs glued to the wood. As a new type of composite beam, it combines the advantages of low energy consumption of wood, high permeability, and less pollution and the advantages of light weight and high strength of steel, high degree of assembly, short construction period, and less construction waste generated. Carrying out research is of great significance to improve the mechanical properties of steel-wood composite beams and promote the development of steel-wood composite structures. In this paper, three hot-rolled H-beam-larch composite beams and one pure steel beam were tested for bending capacity. The composite beams are divided into two different combinations of A and B types. The two sides of the web are connected with larch wood by structural glue to form a composite beam. The type B composite beam is a larch wood glued on both sides of the H-shaped steel web and penetrates the bolts at the same time. Through the three-point monotonic static grading loading of the composite beam, the deflection change, failure phenomenon, and form of the specimen during the experiment were observed. Under the circumstances, the ultimate bearing capacity of the test piece was changed to study the combined effect of larch and hot-rolled H-shaped steel. The results show that the overall performance of the H-shaped steel-larch composite beam is good. Bonding wooden boards on both sides of the steel beam web can improve the bearing capacity, and the form of the member is more reasonable and effective; increasing the cross-sectional size of the H-beam in the steel-wood composite beam can further improve the bearing capacity of the composite beam; adding bolt anchorage on the basis of the structural glue used in the composite beam can further improve the bearing capacity of the composite beam. The superposition principle is used to simplify the calculation of the ultimate bearing capacity of H-shaped steel-larch composite beams. Comparing the calculation results with the test results, the data are in good agreement, which can provide a design reference for the practical application of such composite beams.

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Lightweight timber I-beams reinforced by composite materials

Cited by 41 publications

References 41 publications

Veneer-based timber circular hollow section beams: Behaviour, modelling and design

Veneer-based timber circular hollow section beams: Behaviour, modelling and design

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

Experimental Study on the Bending Behavior of Steel‐Wood Composite Beams

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