In-plane compressive behavior of short cross-laminated bamboo and timber

• Published in: Industrial crops and products 2023-09, Vol.200, p.116807, Article 116807
• Main Authors: Li, Hao, Wei, Yang, Yan, Libo, Semple, Katherine E., Dai, Chunping
• Format: Article
• Language: English
• Subjects: Bamboo scrimber; Compressive behavior; Cross-laminated bamboo and timber; Cross-laminated timber; Short wall specimen; Sustainable construction product
• ISSN: 0926-6690; 1872-633X
• DOI: 10.1016/j.indcrop.2023.116807

This study investigated the post-yield behavior of 5-layer cross-laminated bamboo and timber (CLBT) short wall specimens under in-plane compressive loading, and cross-laminated timber (CLT) specimens were used as the control. Compared to CLT, the replacement of the outermost spruce-pine-fir layers in CLBT with bamboo scrimber layers led to a 90% increase in compressive strength and a 20% increase in compressive modulus in the major strength direction. A quantitative evaluation employing absolute and relative error indicators demonstrated that the Richard-Abbott model adequately predicted the tested stress–strain relationships. In contrast to CLT, CLBT exhibited a more extended strain hardening stage after yielding and a shorter strain softening stage after the maximum point, particularly in the major strength direction. The ductility and toughness indices of CLBT, calculated based on the yield and failure points, were higher than those of CLT in the major and minor strength directions. The energy absorption provided a better representation of toughness characteristics for CLBT and CLT compared to the toughness index. This study provides a technical database and guidelines for the application of mass hybrid bamboo and wood products in the construction industry. •The in-plane compressive strength and modulus of CLBT are significantly higher than those of CLT.•Compared with CLT, CLBT exhibits a longer strain hardening stage and a shorter strain softening stage.•Replacing the outermost SPF layers with bamboo scrimber layers enhances ductility and toughness.•The Richard-Abbott model accurately describes the measured stress–strain relationship.