The Observation of Creep Strain Distribution in Laminated Veneer Lumber Subjected to Different Loading Regimes

Author:

Xu Shuwei12,Cao Yizhong12,Cao Xiaobing3,Yang Pei4,Liu Xiaohan4,Tang Ruixing4,Yan Yutao12ORCID,Wu Qiang12ORCID

Affiliation:

1. College of Chemistry and Materials Engineering, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China

2. National Engineering and Technology Research Center of Wood-Based Resources Comprehensive Utilization, Hangzhou 311300, China

3. College of Art and Design, Bamboo Research Institute, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China

4. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China

Abstract

Timber architectures have arisen as sustainable solutions for high-rise and long-span buildings, assisting in implementing a circular economy. The creep strain dissipation of laminated veneer lumber (LVL) was investigated in this work to understand the inherent creep behaviors of LVL derived from natural wood. The results demonstrated a significant loading regime dependency of the creep behaviors of LVL. Coupled creep strain dissipation that transits/is parallel to the wood–adhesive interface was proven in the creep deformation of flat-wise and edge-wise bent LVL. In contrast, the creep strain dissipated considerably along the wood–adhesive interface when the LVL was subjected to axial compression creep. Further investigation into the morphologies of LVL after creep revealed that direct contact between the loading plane and wood–adhesive interface could be a plausible trigger for the accelerated deformation and the resultant plastic deformation of the LVL after creep. We believe that this work provides essential insights into the creep strain dissipation of LVL. It is thus beneficial for improving creep resistance and assisting in the long-term safe application of LVL-based engineered wood products in timber architectures.

Funder

National Natural Science Foundation of China

Scientific Research Development Foundation of Zhejiang A&F University

Research Foundation of Talented Scholars of Zhejiang A&F University

Publisher

MDPI AG

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