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A platform for research: civil engineering, architecture and urbanism
Screw withdrawal capacity of full-culm P. edulis bamboo
Highlights Withdrawal capacity of screws embedded in P. edulis bamboo is presented. Twenty screw type-size-predrill combinations are presented. Average withdrawal parameters exceeding fax = 40 N/mm2 were achieved. Screw diameters greater than 6 mm required predrilled holes. There was no advantage observed to using self-drilling screws.
Abstract The withdrawal capacity – as determined by a modified ASTM D1761 test – of screws embedded in Phyllostachys edulis bamboo culm walls is presented, demonstrating capacities and behaviour suitable for structural load bearing applications. This study considers twelve screw type-size combinations and considers whether these are predrilled or the screws are inserted without predrilling, resulting in 20 screw type-size-predrill combinations. For the better-performing screws, average withdrawal parameters exceeding fax = 40 N/mm2 were achieved; twice that determined for three-ply plywood having comparable thickness. Comparison with a comparable dataset of screw withdrawal tests from Guadua angustifolia Kunth bamboo indicates that the value of fax is likely species-dependent. In order to mitigate splitting upon screw insertion into bamboo, screw diameters generally less than 6 mm were required unless the screws are inserted into predrilled holes. There was no advantage observed to using self-drilling screws.
Screw withdrawal capacity of full-culm P. edulis bamboo
Highlights Withdrawal capacity of screws embedded in P. edulis bamboo is presented. Twenty screw type-size-predrill combinations are presented. Average withdrawal parameters exceeding fax = 40 N/mm2 were achieved. Screw diameters greater than 6 mm required predrilled holes. There was no advantage observed to using self-drilling screws.
Abstract The withdrawal capacity – as determined by a modified ASTM D1761 test – of screws embedded in Phyllostachys edulis bamboo culm walls is presented, demonstrating capacities and behaviour suitable for structural load bearing applications. This study considers twelve screw type-size combinations and considers whether these are predrilled or the screws are inserted without predrilling, resulting in 20 screw type-size-predrill combinations. For the better-performing screws, average withdrawal parameters exceeding fax = 40 N/mm2 were achieved; twice that determined for three-ply plywood having comparable thickness. Comparison with a comparable dataset of screw withdrawal tests from Guadua angustifolia Kunth bamboo indicates that the value of fax is likely species-dependent. In order to mitigate splitting upon screw insertion into bamboo, screw diameters generally less than 6 mm were required unless the screws are inserted into predrilled holes. There was no advantage observed to using self-drilling screws.
Screw withdrawal capacity of full-culm P. edulis bamboo
Harries, Kent A. (author) / Morrill, Pheobe (author) / Gauss, Christian (author) / Flower, Chelsea (author) / Akinbade, Yusuf (author) / Trujillo, David (author)
Construction and Building Materials ; 216 ; 531-541
2019-05-02
11 pages
Article (Journal)
Electronic Resource
English
Bamboo , Connection , Screw , Splitting , Withdrawal
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