Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core
Light-frame wood structures are the most common type of construction for residential and low-rise buildings in North America. The 2015 edition of the National Building Code of Canada has increased the height limit for light-frame wood construction from 4 to 6 stories. With the increase in building h...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/12/7/1018 |
| _version_ | 1827619124803534848 |
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| author | Ariya Eini Lina Zhou Chun Ni |
| author_facet | Ariya Eini Lina Zhou Chun Ni |
| author_sort | Ariya Eini |
| collection | DOAJ |
| description | Light-frame wood structures are the most common type of construction for residential and low-rise buildings in North America. The 2015 edition of the National Building Code of Canada has increased the height limit for light-frame wood construction from 4 to 6 stories. With the increase in building height, it was noticed that light-frame wood structures may be governed by inter-story drift under wind and seismic loads. To reduce the inter-story drift, a hybrid system, consisting of CLT cores and light-frame structures, is proposed. The efficiency of this hybrid system is dependent on the performance of the connections between the two sub-systems. In this project, self-tapping screws (STSs) were used to connect the CLT core and light-frame wood structures on the floor level. Monotonic and reversed-cyclic tests were carried out on CLT-wood frame connections connected with STSs inserted at 45°, 90°, and mixed angles (45° and 90°). The connection performance was evaluated in terms of strength, stiffness, ultimate displacement, ductility, and energy dissipation capacity. Results show that a joint with STSs inserted at 45° had high stiffness and ductility but low energy dissipation, while connections with STSs installed at 90° had high ductility and energy dissipation but low stiffness. Connections with STSs inserted at mixed angles (45° and 90°) achieved the advantages of both configurations when the STSs were inserted at 45° or 90° individually, i.e., high stiffness, ductility, and energy dissipation. The ductility and energy dissipation were significantly improved compared with connections with STSs only inserted at 45° or 90°. This mixed angle connection can be an ideal design for connecting light-frame wood structures to a CLT core to resist wind and seismic load. |
| first_indexed | 2024-03-09T10:21:49Z |
| format | Article |
| id | doaj.art-fbc270202c074134abfe19170e1943e8 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T10:21:49Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-fbc270202c074134abfe19170e1943e82023-12-01T21:58:43ZengMDPI AGBuildings2075-53092022-07-01127101810.3390/buildings12071018Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT CoreAriya Eini0Lina Zhou1Chun Ni2Department of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaDepartment of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, CanadaBuilding Systems, FPInnovations, Vancouver, BC V6T 1Z4, CanadaLight-frame wood structures are the most common type of construction for residential and low-rise buildings in North America. The 2015 edition of the National Building Code of Canada has increased the height limit for light-frame wood construction from 4 to 6 stories. With the increase in building height, it was noticed that light-frame wood structures may be governed by inter-story drift under wind and seismic loads. To reduce the inter-story drift, a hybrid system, consisting of CLT cores and light-frame structures, is proposed. The efficiency of this hybrid system is dependent on the performance of the connections between the two sub-systems. In this project, self-tapping screws (STSs) were used to connect the CLT core and light-frame wood structures on the floor level. Monotonic and reversed-cyclic tests were carried out on CLT-wood frame connections connected with STSs inserted at 45°, 90°, and mixed angles (45° and 90°). The connection performance was evaluated in terms of strength, stiffness, ultimate displacement, ductility, and energy dissipation capacity. Results show that a joint with STSs inserted at 45° had high stiffness and ductility but low energy dissipation, while connections with STSs installed at 90° had high ductility and energy dissipation but low stiffness. Connections with STSs inserted at mixed angles (45° and 90°) achieved the advantages of both configurations when the STSs were inserted at 45° or 90° individually, i.e., high stiffness, ductility, and energy dissipation. The ductility and energy dissipation were significantly improved compared with connections with STSs only inserted at 45° or 90°. This mixed angle connection can be an ideal design for connecting light-frame wood structures to a CLT core to resist wind and seismic load.https://www.mdpi.com/2075-5309/12/7/1018light-frame wood structurecross-laminated timberself-tapping screwmonotonic testreversed-cyclic testconnection capacity |
| spellingShingle | Ariya Eini Lina Zhou Chun Ni Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core Buildings light-frame wood structure cross-laminated timber self-tapping screw monotonic test reversed-cyclic test connection capacity |
| title | Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core |
| title_full | Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core |
| title_fullStr | Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core |
| title_full_unstemmed | Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core |
| title_short | Behavior of Self-Tapping Screws Used in Hybrid Light Wood Frame Structures Connected to a CLT Core |
| title_sort | behavior of self tapping screws used in hybrid light wood frame structures connected to a clt core |
| topic | light-frame wood structure cross-laminated timber self-tapping screw monotonic test reversed-cyclic test connection capacity |
| url | https://www.mdpi.com/2075-5309/12/7/1018 |
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