Experimental and Nonlinear Analytical Studies on Prefabricated Timber–Concrete Composite Structures with Crossed Inclined Coach Screw Connections

Tao, Haotian; Yang, Huifeng; Liu, Weiqing; Wang, Chaochao; Shi, Benkai; Ling, Xiu

doi:10.1061/(asce)st.1943-541x.0002988

Cited by 28 publications

(5 citation statements)

References 34 publications

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“…5c. This failure mode was also observed in the crossed inclined screw type timber-concrete connections in many studies (Derikvand and Fink 2021;Tao et al 2021).…”

Section: Failure Modessupporting

confidence: 68%

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Shear performances of shallow notch-screw connections for timber-concrete composite (TCC) floors

Ben¹,

Dai

Chen

et al. 2022

BioRes

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Shallow notch-screw connections, which showed potential superior slip moduli and load-carrying capacity compared with the traditional screwed connections and can be employed in the timber-concrete composite (TCC) floors were examined in this study. Eight groups of shallow notch-screw connections were designed to perform the push-out tests, in which the arrangement of screws, the heavy timber types, and the width of the shallow notch were considered. The depth of the notch was uniformly 15 mm. The vertical screws and the cross inclined screws were separately selected as the reinforcement for the shallow notch connections. The common heavy timber panels, including nail laminated timber (NLT), glulam, and cross laminated timber (CLT), were adopted. The width of the shallow notch tested included 100 and 200 mm. The experimental results showed that the shallow notch connections underwent ductile failure. The effects of testing factors on the shear strength, slip moduli, and ductility were discussed. The design proposals about the slip moduli of the shallow notches using each timber panel types were proposed, aiming to provide guidance for the application of the TCC floors with shallow notches.

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“…5c. This failure mode was also observed in the crossed inclined screw type timber-concrete connections in many studies (Derikvand and Fink 2021;Tao et al 2021).…”

Section: Failure Modessupporting

confidence: 68%

“…5a and 5b, the specimens with partly shallow notches mainly showed concrete cracking or expulsion failure. This was caused by the uplifting force of the shearcompression loaded screws (Tao et al 2021), which also led to the opening gap between the timber and concrete, as shown in Fig. 5c.…”

Section: Failure Modesmentioning

confidence: 99%

Shear performances of shallow notch-screw connections for timber-concrete composite (TCC) floors

Ben¹,

Dai

Chen

et al. 2022

BioRes

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“…(1) Screwed connectors Inclined screwed connectors are characterized by high load-carrying capacities and slip moduli thanks to the contribution of the great pushout behavior of screws in tension [4,31,134]. Considering the reciprocating action of seismic load, it is necessary to arrange the reverse sheared screws or bi-directional sheared screws between the timber and concrete [135].…”

Section: Shear Connectorsmentioning

confidence: 99%

Long-Term Behavior of Timber–Concrete Composite Structures: A Literature Review on Experimental and Numerical Investigations

Shi,

Zhou,

Tao

et al. 2024

Buildings

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Timber–concrete composite structure is a type of efficient combination form composed of concrete floors and timber beams or floors through shear connectors, and shows good application potential in the floor system of timber buildings. The long-term performance of the timber–concrete composite structures is complex and is affected by the creep of timber and concrete, as well as the long-term slip of the shear connectors. This article presents a comprehensive overview of the research status on the long-term behavior of timber–concrete composite members and different shear connectors. For the shear connectors, the effects of loading levels, environments, and component materials on their creep coefficients are summarized. As to the timber–concrete composite members, both the experimental and numerical investigations are gathered into discussions: the connection types, component materials, loading conditions, and durations in the long-term tests are also discussed; various models for describing long-term behavior of timber, concrete, and connection systems are provided, and then a comprehensive description of the progress of numerical investigations over the last decades is made. In addition, the suggestions for future research are proposed to reach a clearer understanding of the bending mechanisms and mechanical characteristics of timber–concrete composite structures.

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“…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. Wei et al [22] investigated the bending performances of the bamboo-concrete composite beams with prefabricated concrete slabs, which were connected by glued-in steel-plate connections, and the grouting method was also adopted to assemble the bamboo beam and the concrete slab, which obtained superior bending performances.…”

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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Experimental and Nonlinear Analytical Studies on Prefabricated Timber–Concrete Composite Structures with Crossed Inclined Coach Screw Connections

Cited by 28 publications

References 34 publications

Shear performances of shallow notch-screw connections for timber-concrete composite (TCC) floors

Shear performances of shallow notch-screw connections for timber-concrete composite (TCC) floors

Long-Term Behavior of Timber–Concrete Composite Structures: A Literature Review on Experimental and Numerical Investigations

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

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