Zhang, C., Harris, R. and Chang, W.-S. orcid.org/0000-0002-2218-001X (2020) Strain distribution of dowel-type connections reinforced with self-tapping screws. Journal of Materials in Civil Engineering, 32 (1). ISSN 0899-1561
Abstract
Current limited guidance on the selection of screws together with undefined design specifications restricts the effectiveness of self-tapping screws as reinforcement on timber members to control crack propagation. Using digital image correlation (DIC), this study visualized the surface strain distribution of screw-reinforced dowel-type connections to understand the influence of thread configuration and screw-to-dowel distance on controlling crack propagation. The experiment was based on single-dowel embedment tests using 16- and 20-mm-diameter steel dowels. Three thread lengths (0%, 33%, and 100% thread) and six screw-to-dowel distances (0.5d, 0.75d, 1d, 1.5d, 2d, and 4d) were investigated. Results show that a screw with 33% thread on the point end can be as effective as screws with 100% thread to control crack propagation under the same geometrical parameters of the connections. Results also reveal that a screw placed further from the dowel (e.g., at 2d distance) can delay the crack-controlling effect. Self-tapping screws placed at 2d can still improve the embedment strength and ductility; however, further doubling this distance (4d) did not enhance the embedment strength, but a higher ductility was still achieved.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Society of Civil Engineers. This is an author-produced version of a paper subsequently published in Journal of Materials in Civil Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > School of Architecture (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 24 Oct 2019 08:59 |
Last Modified: | 25 Mar 2020 14:50 |
Status: | Published |
Publisher: | American Society of Civil Engineers (ASCE) |
Refereed: | Yes |
Identification Number: | 10.1061/(asce)mt.1943-5533.0002883 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:152602 |