Experimental Study on Timber−Lightweight Concrete Composite Beams with Ductile Bolt Connectors

Hu, Yafeng; Wei, Yang; Chen, Si; Yan, Yihua; Zhang, Weiyao

doi:10.3390/ma14102632

Cited by 9 publications

(6 citation statements)

References 29 publications

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“…Several researchers have been investigating the feasibility of different connections among TCCs. Following these, a considerable body of work has been carried out to build high-performance shear connectors and quantify the load slip, load-bearing capacity, and stiffness of the connections, mostly via push-out-shear tests [21][22][23][24][25][26]. e connection in TCC was found to affect the load-bearing behavior of the composite beam, while the structural behavior of the slab was influenced by the stiffness, ductility, and shear resistance of the connection [27,28].…”

Section: Literature Reviewmentioning

confidence: 99%

“…e motivation of the study is to investigate timber-concrete composite structural design, which consists of a concrete slab, where concrete is designed to be in the compression zone, and the timber is attached below in the tension zone. ese two materials are combined using different shear connectors, such as coach screw shear connectors (zinc-plated steel coach screw), stud connectors, dowels, and notches cut in the timber filled with concrete [20][21][22][23][24][25][26][27][28][29][30]. e shear connection between timber and concrete is essential as these connectors typically govern the strength and the structural behavior of the TCC structures.…”

Section: Motivation Of Researchmentioning

confidence: 99%

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Hybrid Timber Concrete Composite Slab for Analysis of Lag Screw Embedment Connections

Lawati

Erdogmus

Young

et al. 2022

Advances in Civil Engineering

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Push-out-shear tests were used in this study to analyze lag screw connections in timber-concrete composite (TCC) slabs based on the embedment depth. The goal of this research is to look into the relationship between shear capacity and embedment depth in TCC, as well as to investigate the embedment strength of the wood. Experiments were carried out at different embedment depths (5.08 cm, 7.0 cm, and 8.9 cm). The prepared samples were examined in order to determine the failure modes and provide an accurate assessment of the influence of embedment depth on TCC slabs. The investigation on the embedment strength of the wood was performed then for the analysis of the crushing of wood fibers, lag screw yielding strength, and maximum load applied at embedment depths of 6.6 cm and 7.0 cm. The results indicate that between 5.08 cm and 7.0 cm, there was an apparent improvement in the relationship between embedment depth (ED) and shear capacity of TCC slabs in terms of the shear strength, while a significant difference was observed between 7.0 cm and 8.9 cm. The study suggests that the ED of the TCC slab should be maintained at around 7.33 times the diameter of the lag screw.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Motivation Of Researchmentioning

confidence: 99%

Hybrid Timber Concrete Composite Slab for Analysis of Lag Screw Embedment Connections

Lawati

Erdogmus

Young

et al. 2022

Advances in Civil Engineering

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“…It was demonstrated that the deconstructable connection possesses the similar shear behaviors compared with the permanent connections. In addition, Crocetti et al [18], Zhang et al [19], and Hu et al [20] also provided the feasible assembly-type connecting methods for TCC structures based on the dowel-type connections. Tao et al [21] investigated shear performances of the cross inclined screw connections using prefabricated slabs through the grouting method, and obtained the expected experimental results.…”

Section: Introductionmentioning

confidence: 99%

Shear Behaviors of Steel-Plate Connections for Timber-Concrete Composite Beams with Prefabricated Concrete Slabs

Shi¹,

Huang²,

Yang³

et al. 2023

Journal of Renewable Materials

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To promote the development of timber-concrete composite (TCC) structures, it is necessary to propose the assembly-type connections with high assembly efficiency and shear performances. This article presented the experimental results of the innovative steel-plate connections for TCC beams using prefabricated concrete slabs. The steel-plate connections consisted of the screws and the steel-plates. The steel-plates were partly embedded in the concrete slabs. The concrete slabs and the timber beams were connected by screws through the steel-plates. The parameters researched in this article included screw number, angle steel as the reinforcement for anchoring, and shallow notches on the timber surface to restrict the slip of the steel-plates. Experimental results were discussed in terms of failure modes, ultimate bearing capacities, and slip moduli. It was found that increasing the number of screws could lead to the obvious improvement on the ultimate bearing capacities and the slip moduli at the ultimate state; and the angle steel as the reinforcement showed the slight influence on the ultimate bearing capacities and the slip moduli. The application of the shallow notch can greatly improve the ultimate bearing capacities and the slip moduli. The calculation models for the ultimate bearing capacities and the slip moduli of the steel-plate connections with and without shallow notches were proposed, which showed good accuracy compared with the experimental results.

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“…[2][3][4][5][6] In recent years, studies have indicated that bamboo engineering materials are suitable not only for decoration and furniture but also for building structures [7][8][9][10][11] and have been generally utilized in pedestrian bridges, residential buildings, and landscape buildings. [12][13][14][15] In bamboo engineering materials, reconstituted bamboo has excellent mechanical properties, [16][17][18] which is a research hotspot for new biomass engineering materials.…”

Section: Introductionmentioning

confidence: 99%

“…Existing studies of reconstituted bamboo mostly involve bending and compression members, 19 including ordinary restructuring bamboo beams and bamboo poles, 20,21 and the restructuring of bamboo, fiber reinforced polymer (FRP) and concrete, and wood composite structures. 18,[22][23][24][25] However, research on the impact of environmental temperature on the physical and mechanical properties of bamboo is limited. Presently, the effect of temperature on the mechanical performance of reconstituted bamboo research is mainly reflected in heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on compressive mechanical properties and strength design index of reconstituted bamboo

Zhao

Wei

Chen

et al. 2022

J of Applied Polymer Sci

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The effect of temperature on the compressive properties of recombinant bamboo was analyzed. At different temperatures (10 $ 70 C), the failure mode, basic mechanical properties, stress-strain model, and design value of the compressive strength of hot-pressed reconstituted bamboo were investigated through axial unidirectional compression tests. The results indicate that with a rise in temperature, the reconstituted bamboo material changes from brittle to ductile, showing three failure modes: splitting failure, shear failure, and buckling cracking failure. The ultimate compressive strength of reconstituted bamboo decreased from 79.96 to 40.81 MPa, a decrease of 48.96%, and the compressive strain of reconstituted bamboo increased from 0.0069 to 0.0120, an increase of 72.16%. Based on the Richard-Abbott model, the function relation between the elastic modulus reduction factor (λ E1,T ) and the post-yield modulus reduction factor (λ E2,T ) of bamboo compression specimens and the temperature were obtained. A model of the design value of the compression strength considering temperature was established, and the design value of the compression strength was evaluated.

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Experimental Study on Timber−Lightweight Concrete Composite Beams with Ductile Bolt Connectors

Cited by 9 publications

References 29 publications

Hybrid Timber Concrete Composite Slab for Analysis of Lag Screw Embedment Connections

Hybrid Timber Concrete Composite Slab for Analysis of Lag Screw Embedment Connections

Shear Behaviors of Steel-Plate Connections for Timber-Concrete Composite Beams with Prefabricated Concrete Slabs

Effect of temperature on compressive mechanical properties and strength design index of reconstituted bamboo

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