Prediction of bending performance for a separable CLT-concrete composite slab connected by notch connectors

Pang, Sung-Jun; Ahn, Kyung-Sun; Jeong, Seok-Man; Lee, Gun-Cheol; Kim, Hyeon Soo; Oh, Jung-Kwon

doi:10.1016/j.jobe.2021.103900

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…They demonstrated that their proposed system could be deconstructed even after exposure to large loads. Pang et al [34] proposed a deconstructable connector for the wet-dry system as well using round notch connections, however, without the use of screws.…”

Section: Solutions For the Wet-dry Systemmentioning

confidence: 99%

Design for Deconstruction: Benefits, Challenges, and Outlook for Timber–Concrete Composite Floors

Derikvand

Fink

2023

Buildings

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Design for deconstruction (DfD) considers the end-of-life scenario of buildings at an early design stage to ensure that these buildings (or parts of the buildings) can be deconstructed without unproportional effort and material loss. After deconstruction, the elements or materials can be used for future purposes such as reusing (preferably), remanufacturing, or recycling. This opinion paper is aimed to advocate for DfD in timber–concrete composite (TCC) floors as it represents an important contribution toward circular economy design and creates a more sustainable built environment. Different end-of-life scenarios for TCC floors according to their original design and connection type were initially explored. Existing deconstructable connection systems that could enable DfD in TCC floors were reviewed. Furthermore, potential challenges relating to the implementation of DfD in TCC floors are briefly highlighted. Finally, a discussion around the outlook and actions that might be needed to address some of the identified challenges is provided. This paper proposes directions for future developments and contributes to the understanding and promotion of DfD in TCC floors with an emphasis on deconstructable connectors that can enable material recovery and reuse as the preferred end-of-life scenario.

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Section: Solutions For the Wet-dry Systemmentioning

confidence: 99%

Design for Deconstruction: Benefits, Challenges, and Outlook for Timber–Concrete Composite Floors

Derikvand

Fink

2023

Buildings

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“…This eases the process of recycling or reuse of the materials, which makes it a more environmental-friendly option compared to conventional forms of TCC structures. Therefore, deconstructable TCC structures are gaining more attention because of their potential to reduce waste and the environmental impact of buildings [1][2][3][4][5]. However, they are relatively new in the field of construction and the connector options for such structures are limited on the market, especially for the cast-in-situ construction method (i.e., the wet-dry system).…”

Section: Introduction 345mentioning

confidence: 99%

Structural Performance of Timber-Concrete Composite Floor Elements With Deconstructable Connectors and Its Potential for Reuse

Derikvand

Fink

2023

World Conference on Timber Engineering (WCTE 2023)

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By incorporating design methods that allow for disassembly, buildings can be deconstructed at the end of their service life, thereby supporting the principles of circular economy and reducing waste. This paper provides a summary of the latest research advances by the research group for Wooden Structures (Aalto University) on the development and mechanical characteristics of a deconstructable connection system for timber-concrete composite (TCC) floors. This includes an overview of the experimental investigations conducted to date, focusing on the performance of the proposed system both at the connection level and at the floor level. At the connection level, the paper highlights the experimental investigations on the static and cyclic shear properties, as well as the ease of deconstruction after being exposed to substantial loads. Additionally, the floor level examination includes an overview of the bending properties, vibration characteristics, and deconstructability after reaching the failure point. A subsequent experiment is also reported here on the flexibility of the deconstructable connector for reuse and the influence of pre-existing concrete cracks on the performance of prefabricated TCC floors. The paper concludes with an outlook on the future of designing for deconstruction of TCC structures, as it not only reduces the environmental impact of construction but also allows for the efficient reuse of valuable resources.

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“…Structural timber within a building will store the carbon as long as the building is maintained. Thus, the use of timber as a structural element contributes to the atmospheric carbon emissions reduction of buildings (Petersen Raymer 2006;Resch et al 2021;Pang et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Bending behavior of separable glued-laminated timber (GLT)-steel beam combined with inclined screws,

Pang

2023

BioRes

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A separable glued-laminated timber (GLT, Larix kaempferi Carr.)-steel beam system is presented in this work for easy recycling at the time of disposal. The minimum thickness of steel required to induce compressive GLT failure was assembled with GLT by inclined screws. In a total of 8 GLTs, 3 GLTs were not reinforced (control group), and 5 GLTs were reinforced with steel plates (comparison group). In the GLT in the comparison group, a steel plate (SPHC, yield strength: 227 MPa, modulus of elasticity 166.33 GPa) was installed with screws (∅9x160mm, 45°). The deflection and load of specimens were measured by a third-point bending test to derive their bending stiffness and load-carrying capacities. All specimens in the control group showed brittle tensile failure, but all specimens in the comparison group showed ductile behavior and maintained a load-carrying capacity of about 30 kN. After the compression failure of the GLT, there was no damage to the screw connection, while the steel plate was extended. Based on the behavior of the steel, a GLT-steel beam prediction model was developed, similar to the structural design method for reinforced concrete.

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Prediction of bending performance for a separable CLT-concrete composite slab connected by notch connectors

Cited by 8 publications

References 34 publications

Design for Deconstruction: Benefits, Challenges, and Outlook for Timber–Concrete Composite Floors

Design for Deconstruction: Benefits, Challenges, and Outlook for Timber–Concrete Composite Floors

Structural Performance of Timber-Concrete Composite Floor Elements With Deconstructable Connectors and Its Potential for Reuse

Bending behavior of separable glued-laminated timber (GLT)-steel beam combined with inclined screws,

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