文献类型：期刊文献

英文题名：Long-term mechanical properties of bamboo scrimber

作者：Luo, Xiangya[1,2,3] Wang, Xueyu[1,3] Ren, Haiqing[1,3] Zhang, Shuangbao[2] Zhong, Yong[1,3]

第一作者：Luo, Xiangya

通信作者：Zhong, Y[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing, Peoples R China;[2]Beijing Forestry Univ, Coll Mat Sci & Technol, Beijing, Peoples R China;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

年份：2022

卷号：338

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20220048374);Scopus(收录号：2-s2.0-85129539802);WOS:【SCI-EXPANDED(收录号:WOS:000796507200001)】；

基金：Acknowledgment We would like to thank the supported by Fundamental Research Funds of Research Institute of Forest New Technology, Chinese Academy of Forestry (CAFYBB2019SZ008) and the National Natural Science Foundation of China (32171883) for their financial support for this research.

语种：英文

外文关键词：Bamboo scrimber (BS); Long-term mechanical properties; duration of load (DOL); Creep; Time-dependent constitutive models

摘要：Bamboo scrimber (BS), a main bamboo composite, has wide application prospects in green buildings. As a viscoelastic biomass material, long-term mechanical properties are the key indicators for its safe lifetime service. In this study, both short-term and long-term tension tests parallel to grain of BS were conducted. The long-term mechanical properties of BS including the duration of load (DOL) and creep effects were investigated from the macro and micro levels. Results indicated that the DOL effect of BS was more severe than other structural wooden materials, but its relative creep strain was smaller. From microlevel characterization, the DOL effect was strongly correlated with its microfracture morphology and bamboo fiber damage, while the creep effect was related to the decomposition of hemicellulose. Finally, time-dependent constitutive models were developed and provided good prediction for the DOL factor and creep strain of BS under different load durations. This study was beneficial for the long-term safe application of BS as a new structural material.