Moment and shear capacity of Ply-lam composed with plywood and structural timber under out-of-plane bending

• Published in: Journal of wood science Vol. 65; no. 1; pp. 1 - 10
• Main Authors: Pang, Sung-Jun, Lee, Hyeon-Jeong, Yang, Seung Min, Kang, Seog Goo, Oh, Jung-Kwon
• Format: Journal Article
• Language: English
• Published: Singapore Springer Singapore 01.12.2019; Springer Nature B.V; SpringerOpen
• Subjects: Bend tests; Biomedical and Life Sciences; Characterization and Evaluation of Materials; Cross-laminated timber; Life Sciences; Materials Science; Moment capacity; Original Article; Out of plane bending; Ply-lam; Plywood; Predictions; Shear capacity; Shear tests; Structural timber; Timber (structural); Wood laminates; Wood Science & Technology; Shear capacity; Structural timber; Moment capacity; Cross-laminated timber; Plywood; Ply-lam
• ISSN: 1435-0211; 1611-4663
• DOI: 10.1186/s10086-019-1847-8

The aim of this study was to investigate the moment and shear capacity of Ply-lam which is composed with plywood and structural timber. The moment and shear capacity of Ply-lam were predicted by using prediction methodologies for typical cross-laminated timber (CLT). The predicted values by the methodologies were verified by comparison with measured capacities. Fifty-eight specimens of Ply-lam (five layers) were manufactured and half of the specimens were tested for bending (span-to-depth ratio ( R sd ) was 25:1). The other specimens were tested for rolling shear ( R sd was 12:1) in accordance with EN 16351. The results show that typical prediction methods for structural properties of CLT can also be used to predict those of Ply-lam, since the measured values were higher than the predicted values. In rolling shear test, 52% specimens failed by bending at the bottom layer. This indicates that the rolling shear test method in EN 16351 was not suitable for Ply-lam because the typical CLT would be reinforced by replacing the cross layer with plywood. Thus, the span-to-depth ratio needs to be reduced for hybrid CLT like Ply-lam.